From 566304494a1a5447c7c9771b9f93b6130090d037 Mon Sep 17 00:00:00 2001
From: Dennis Fanshaw <64549250+hyposcaler-bot@users.noreply.github.com>
Date: Mon, 14 Oct 2024 13:08:10 +0000
Subject: [PATCH 1/2] change default ipv6 mgmt prefix to use
 3fff:172:20:20::/64

---
 clab/config.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clab/config.go b/clab/config.go
index ae2806293..3928628c5 100644
--- a/clab/config.go
+++ b/clab/config.go
@@ -28,7 +28,7 @@ const (
 	// a name of a docker network that nodes management interfaces connect to.
 	dockerNetName     = "clab"
 	dockerNetIPv4Addr = "172.20.20.0/24"
-	dockerNetIPv6Addr = "2001:172:20:20::/64"
+	dockerNetIPv6Addr = "3fff:172:20:20::/64"
 	// veth link mtu.
 	DefaultVethLinkMTU = 9500
 

From eddaea9a5c56a8f1eed274330573695aa2b14693 Mon Sep 17 00:00:00 2001
From: Roman Dodin <dodin.roman@gmail.com>
Date: Mon, 14 Oct 2024 16:34:36 +0300
Subject: [PATCH 2/2] change v6 prefix in the docs

---
 docs/cmd/inspect.md                           | 26 ++++++++--------
 docs/install.md                               |  6 ++--
 docs/lab-examples/cvx02.md                    |  2 +-
 docs/lab-examples/min-5clos.md                | 28 ++++++++---------
 docs/lab-examples/peering-lab.md              | 16 +++++-----
 docs/manual/clabernetes/quickstart.md         |  2 +-
 docs/manual/inventory.md                      |  6 ++--
 docs/manual/kinds/ceos.md                     |  4 +--
 docs/manual/kinds/crpd.md                     |  4 +--
 docs/manual/kinds/srl.md                      |  2 +-
 docs/manual/network.md                        | 26 ++++++++--------
 docs/manual/nodes.md                          |  2 +-
 docs/quickstart.md                            |  4 +--
 docs/rn/0.26.md                               |  2 +-
 lab-examples/clos02/README.md                 | 28 ++++++++---------
 lab-examples/clos02/setup.clos02.clab.yml     | 30 +++++++++----------
 .../templated01/topology_config.gotmpl        |  4 +--
 .../templated02/topology_config.gotmpl        |  8 ++---
 schemas/clab.schema.json                      |  8 ++---
 tests/01-smoke/01-basic-flow.robot            |  2 +-
 tests/01-smoke/01-linux-nodes.clab.yml        |  4 +--
 21 files changed, 107 insertions(+), 107 deletions(-)

diff --git a/docs/cmd/inspect.md b/docs/cmd/inspect.md
index 45c1ecd04..1695adba0 100644
--- a/docs/cmd/inspect.md
+++ b/docs/cmd/inspect.md
@@ -51,10 +51,10 @@ The local `-w | --wide` flag adds all available columns to the `inspect` output
 +---+------------+----------+-----------------+--------------+--------------------+------+-------+---------+----------------+----------------------+
 | # | Topo Path  | Lab Name |      Name       | Container ID |       Image        | Kind | Group |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+------------+----------+-----------------+--------------+--------------------+------+-------+---------+----------------+----------------------+
-| 1 | newlab.yml | newlab   | clab-newlab-n1  | 3c8262034088 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.4/24 | 2001:172:20:20::4/80 |
-| 2 |            |          | clab-newlab-n2  | 79c562b71997 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.5/24 | 2001:172:20:20::5/80 |
-| 3 | srl02.yml  | srl01    | clab-srl01-srl  | 13c9e7543771 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.2/24 | 2001:172:20:20::2/80 |
-| 4 |            |          | clab-srl01-srl2 | 8cfca93b7b6f | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.3/24 | 2001:172:20:20::3/80 |
+| 1 | newlab.yml | newlab   | clab-newlab-n1  | 3c8262034088 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.4/24 | 3fff:172:20:20::4/80 |
+| 2 |            |          | clab-newlab-n2  | 79c562b71997 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.5/24 | 3fff:172:20:20::5/80 |
+| 3 | srl02.yml  | srl01    | clab-srl01-srl  | 13c9e7543771 | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.2/24 | 3fff:172:20:20::2/80 |
+| 4 |            |          | clab-srl01-srl2 | 8cfca93b7b6f | srlinux:20.6.3-145 | srl  |       | running | 172.20.20.3/24 | 3fff:172:20:20::3/80 |
 +---+------------+----------+-----------------+--------------+--------------------+------+-------+---------+----------------+----------------------+
 ```
 
@@ -67,8 +67,8 @@ Provide information about the running lab named `srlceos01`
 +---+---------------------+--------------+---------+------+-------+---------+----------------+----------------------+
 | # |        Name         | Container ID |  Image  | Kind | Group |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+---------------------+--------------+---------+------+-------+---------+----------------+----------------------+
-| 1 | clab-srlceos01-ceos | 90bebb1e2c5f | ceos    | ceos |       | running | 172.20.20.4/24 | 2001:172:20:20::4/80 |
-| 2 | clab-srlceos01-srl  | 82e9aa3c7e6b | srlinux | srl  |       | running | 172.20.20.3/24 | 2001:172:20:20::3/80 |
+| 1 | clab-srlceos01-ceos | 90bebb1e2c5f | ceos    | ceos |       | running | 172.20.20.4/24 | 3fff:172:20:20::4/80 |
+| 2 | clab-srlceos01-srl  | 82e9aa3c7e6b | srlinux | srl  |       | running | 172.20.20.3/24 | 3fff:172:20:20::3/80 |
 +---+---------------------+--------------+---------+------+-------+---------+----------------+----------------------+
 ```
 
@@ -80,8 +80,8 @@ INFO[0000] Parsing & checking topology file: srl02.clab.yml
 +---+-----------------+--------------+-----------------------+------+---------+----------------+----------------------+
 | # |      Name       | Container ID |         Image         | Kind |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+-----------------+--------------+-----------------------+------+---------+----------------+----------------------+
-| 1 | clab-srl02-srl1 | 7a7c101be7d8 | ghcr.io/nokia/srlinux | srl  | running | 172.20.20.4/24 | 2001:172:20:20::4/64 |
-| 2 | clab-srl02-srl2 | 5e3737621753 | ghcr.io/nokia/srlinux | srl  | running | 172.20.20.5/24 | 2001:172:20:20::5/64 |
+| 1 | clab-srl02-srl1 | 7a7c101be7d8 | ghcr.io/nokia/srlinux | srl  | running | 172.20.20.4/24 | 3fff:172:20:20::4/64 |
+| 2 | clab-srl02-srl2 | 5e3737621753 | ghcr.io/nokia/srlinux | srl  | running | 172.20.20.5/24 | 3fff:172:20:20::5/64 |
 +---+-----------------+--------------+-----------------------+------+---------+----------------+----------------------+
 ```
 
@@ -94,9 +94,9 @@ clab inspect --all --wide
 +---+-----------------------------------+----------+-------+-----------------+--------------+-----------------------+---------------+---------+----------------+----------------------+
 | # |             Topo Path             | Lab Name | Owner |      Name       | Container ID |         Image         |     Kind      |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+-----------------------------------+----------+-------+-----------------+--------------+-----------------------+---------------+---------+----------------+----------------------+
-| 1 | lab-examples/srl01/srl01.clab.yml | srl01    | user1 | clab-srl01-srl  | ea86f40b412a | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
-| 2 | lab-examples/srl02/srl02.clab.yml | srl02    | user2 | clab-srl02-srl1 | ba7e807235b6 | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.4/24 | 2001:172:20:20::4/64 |
-| 3 |                                   |          |       | clab-srl02-srl2 | 71006155b70a | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.3/24 | 2001:172:20:20::3/64 |
+| 1 | lab-examples/srl01/srl01.clab.yml | srl01    | user1 | clab-srl01-srl  | ea86f40b412a | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.2/24 | 3fff:172:20:20::2/64 |
+| 2 | lab-examples/srl02/srl02.clab.yml | srl02    | user2 | clab-srl02-srl1 | ba7e807235b6 | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.4/24 | 3fff:172:20:20::4/64 |
+| 3 |                                   |          |       | clab-srl02-srl2 | 71006155b70a | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.3/24 | 3fff:172:20:20::3/64 |
 +---+-----------------------------------+----------+-------+-----------------+--------------+-----------------------+---------------+---------+----------------+----------------------+
 ```
 
@@ -113,7 +113,7 @@ clab inspect --all --wide
     "kind": "srl",
     "state": "running",
     "ipv4_address": "172.20.20.3/24",
-    "ipv6_address": "2001:172:20:20::3/80"
+    "ipv6_address": "3fff:172:20:20::3/80"
   },
   {
     "lab_name": "srlceos01",
@@ -123,7 +123,7 @@ clab inspect --all --wide
     "kind": "ceos",
     "state": "running",
     "ipv4_address": "172.20.20.4/24",
-    "ipv6_address": "2001:172:20:20::4/80"
+    "ipv6_address": "3fff:172:20:20::4/80"
   }
 ]
 ```
diff --git a/docs/install.md b/docs/install.md
index e2ac6c258..8bd5ab211 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -463,7 +463,7 @@ root@docker-desktop:/Users/romandodin/clab# clab dep -t 2srl.clab.yml
 INFO[0000] Parsing & checking topology file: 2srl.clab.yml
 INFO[0000] Creating lab directory: /Users/romandodin/clab/clab-2srl
 INFO[0000] Creating root CA
-INFO[0000] Creating docker network: Name='clab', IPv4Subnet='172.20.20.0/24', IPv6Subnet='2001:172:20:20::/64', MTU='1500'
+INFO[0000] Creating docker network: Name='clab', IPv4Subnet='172.20.20.0/24', IPv6Subnet='3fff:172:20:20::/64', MTU='1500'
 INFO[0000] Creating container: srl1
 INFO[0000] Creating container: srl2
 INFO[0001] Creating virtual wire: srl1:e1-1 <--> srl2:e1-1
@@ -471,8 +471,8 @@ INFO[0001] Adding containerlab host entries to /etc/hosts file
 +---+----------------+--------------+-----------------------+------+-------+---------+----------------+----------------------+
 | # |      Name      | Container ID |         Image         | Kind | Group |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+----------------+--------------+-----------------------+------+-------+---------+----------------+----------------------+
-| 1 | clab-2srl-srl1 | 574bf836fb40 | ghcr.io/nokia/srlinux | srl  |       | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
-| 2 | clab-2srl-srl2 | f88531a74ffb | ghcr.io/nokia/srlinux | srl  |       | running | 172.20.20.3/24 | 2001:172:20:20::3/64 |
+| 1 | clab-2srl-srl1 | 574bf836fb40 | ghcr.io/nokia/srlinux | srl  |       | running | 172.20.20.2/24 | 3fff:172:20:20::2/64 |
+| 2 | clab-2srl-srl2 | f88531a74ffb | ghcr.io/nokia/srlinux | srl  |       | running | 172.20.20.3/24 | 3fff:172:20:20::3/64 |
 +---+----------------+--------------+-----------------------+------+-------+---------+----------------+----------------------+
 ```
 
diff --git a/docs/lab-examples/cvx02.md b/docs/lab-examples/cvx02.md
index 7eaab22ea..4464a4734 100644
--- a/docs/lab-examples/cvx02.md
+++ b/docs/lab-examples/cvx02.md
@@ -21,7 +21,7 @@ Once the lab is started, the nodes will be able to ping each other:
 
 ```
 $  clab-cvx02-sw1
-Warning: Permanently added 'clab-cvx02-sw1,2001:172:20:20::3' (ECDSA) to the list of known hosts.
+Warning: Permanently added 'clab-cvx02-sw1,3fff:172:20:20::3' (ECDSA) to the list of known hosts.
 root@clab-cvx02-sw1's password:
 Linux sw1 5.10.16.3-networkop+ #17 SMP Mon May 24 15:22:51 BST 2021 x86_64
 root@sw1:mgmt:~# ping 12.12.12.2
diff --git a/docs/lab-examples/min-5clos.md b/docs/lab-examples/min-5clos.md
index dad91e3d2..2aad65ad5 100644
--- a/docs/lab-examples/min-5clos.md
+++ b/docs/lab-examples/min-5clos.md
@@ -56,61 +56,61 @@ The following table outlines the addressing plan used in this lab:
 
 | Source      | Interface      | Towards     | IPv4                | IPv6                      |
 | ----------- | -------------- | ----------- | ------------------- | ------------------------- |
-| leaf1       | mgmt0.0        | -           | `172.100.100.2/24`  | `2001:172:100:100::2/64`  |
+| leaf1       | mgmt0.0        | -           | `172.100.100.2/24`  | `3fff:172:100:100::2/64`  |
 |             | system0.0      | -           | `30.0.0.1/32`       | `3000:30:0:0::1/128`      |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.0/31`       | `1000:10:0:0::0/127`      |
 |             | ethernet-1/2.0 | spine2      | `10.0.0.2/31`       | `1000:10:0:0::2/127`      |
 |             | ethernet-1/3.0 | client1     | `10.0.0.24/31`      | `1000:10:0:0::24/127`     |
-| leaf2       | mgmt0.0        | -           | `172.100.100.3/24`  | `2001:172:100:100::3/64`  |
+| leaf2       | mgmt0.0        | -           | `172.100.100.3/24`  | `3fff:172:100:100::3/64`  |
 |             | system0.0      | -           | `30.0.0.2/32`       | `3000:30:0:0::2/128`      |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.4/31`       | `1000:10:0:0::4/127`      |
 |             | ethernet-1/2.0 | spine2      | `10.0.0.6/31`       | `1000:10:0:0::6/127`      |
 |             | ethernet-1/3.0 | client2     | `10.0.0.26/31`      | `1000:10:0:0::26/127`     |
-| leaf3       | mgmt0.0        | -           | `172.100.100.4/24`  | `2001:172:100:100::4/64`  |
+| leaf3       | mgmt0.0        | -           | `172.100.100.4/24`  | `3fff:172:100:100::4/64`  |
 |             | system0.0      | -           | `30.0.0.3/32`       | `3000:30:0:0::3/128`      |
 |             | ethernet-1/1.0 | spine3      | `10.0.0.12/31`      | `1000:10:0:0::12/127`     |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.14/31`      | `1000:10:0:0::14/127`     |
 |             | ethernet-1/3.0 | client3     | `10.0.0.28/31`      | `1000:10:0:0::28/127`     |
-| leaf4       | mgmt0.0        | -           | `172.100.100.5/24`  | `2001:172:100:100::5/64`  |
+| leaf4       | mgmt0.0        | -           | `172.100.100.5/24`  | `3fff:172:100:100::5/64`  |
 |             | system0.0      | -           | `30.0.0.4/32`       | `3000:30:0:0::4/128`      |
 |             | ethernet-1/1.0 | spine3      | `10.0.0.16/31`      | `1000:10:0:0::16/127`     |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.18/31`      | `1000:10:0:0::18/127`     |
 |             | ethernet-1/3.0 | client4     | `10.0.0.30/31`      | `1000:10:0:0::30/127`     |
-| spine1      | mgmt0.0        | -           | `172.100.100.6/24`  | `2001:172:100:100::6/64`  |
+| spine1      | mgmt0.0        | -           | `172.100.100.6/24`  | `3fff:172:100:100::6/64`  |
 |             | system0.0      | -           | `30.0.0.5/32`       | `3000:30:0:0::5/128`      |
 |             | ethernet-1/1.0 | leaf1       | `10.0.0.1/31`       | `1000:10:0:0::1/127`      |
 |             | ethernet-1/2.0 | leaf2       | `10.0.0.5/31`       | `1000:10:0:0::5/127`      |
 |             | ethernet-1/3.0 | superspine1 | `10.0.0.8/31`       | `1000:10:0:0::8/127`      |
-| spine2      | mgmt0.0        | -           | `172.100.100.7/24`  | `2001:172:100:100::7/64`  |
+| spine2      | mgmt0.0        | -           | `172.100.100.7/24`  | `3fff:172:100:100::7/64`  |
 |             | system0.0      | -           | `30.0.0.6/32`       | `3000:30:0:0::6/128`      |
 |             | ethernet-1/1.0 | leaf1       | `10.0.0.3/31`       | `1000:10:0:0::3/127`      |
 |             | ethernet-1/2.0 | leaf2       | `10.0.0.7/31`       | `1000:10:0:0::7/127`      |
 |             | ethernet-1/3.0 | superspine2 | `10.0.0.10/31`      | `1000:10:0:0::10/127`     |
-| spine3      | mgmt0.0        | -           | `172.100.100.8/24`  | `2001:172:100:100::8/64`  |
+| spine3      | mgmt0.0        | -           | `172.100.100.8/24`  | `3fff:172:100:100::8/64`  |
 |             | system0.0      | -           | `30.0.0.7/32`       | `3000:30:0:0::7/128`      |
 |             | ethernet-1/1.0 | leaf3       | `10.0.0.13/31`      | `1000:10:0:0::13/127`     |
 |             | ethernet-1/2.0 | leaf4       | `10.0.0.17/31`      | `1000:10:0:0::17/127`     |
 |             | ethernet-1/3.0 | superspine1 | `10.0.0.20/31`      | `1000:10:0:0::20/127`     |
-| spine4      | mgmt0.0        | -           | `172.100.100.9/24`  | `2001:172:100:100::9/64`  |
+| spine4      | mgmt0.0        | -           | `172.100.100.9/24`  | `3fff:172:100:100::9/64`  |
 |             | system0.0      | -           | `30.0.0.8/32`       | `3000:30:0:0::8/128`      |
 |             | ethernet-1/1.0 | leaf3       | `10.0.0.15/31`      | `1000:10:0:0::15/127`     |
 |             | ethernet-1/2.0 | leaf4       | `10.0.0.19/31`      | `1000:10:0:0::19/127`     |
 |             | ethernet-1/3.0 | superspine2 | `10.0.0.22/31`      | `1000:10:0:0::22/127`     |
-| superspine1 | mgmt0.0        | -           | `172.100.100.10/24` | `2001:172:100:100::10/64` |
+| superspine1 | mgmt0.0        | -           | `172.100.100.10/24` | `3fff:172:100:100::10/64` |
 |             | system0.0      | -           | `30.0.0.9/32`       | `3000:30:0:0::9/128`      |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.9/31`       | `1000:10:0:0::9/127`      |
 |             | ethernet-1/2.0 | spine3      | `10.0.0.21/31`      | `1000:10:0:0::21/127`     |
-| superspine2 | mgmt0.0        | -           | `172.100.100.11/24` | `2001:172:100:100::11/64` |
+| superspine2 | mgmt0.0        | -           | `172.100.100.11/24` | `3fff:172:100:100::11/64` |
 |             | system0.0      | -           | `30.0.0.10/32`      | `3000:30:0:0::10/128`     |
 |             | ethernet-1/1.0 | spine2      | `10.0.0.11/31`      | `1000:10:0:0::11/127`     |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.23/31`      | `1000:10:0:0::23/127`     |
-| client1     | eth0           | -           | `172.100.100.12/24` | `2001:172:100:100::12/64` |
+| client1     | eth0           | -           | `172.100.100.12/24` | `3fff:172:100:100::12/64` |
 |             | eth1           | leaf1       | `10.0.0.25/31`      | `1000:10:0:0::25/127`     |
-| client2     | eth0           | -           | `172.100.100.13/24` | `2001:172:100:100::13/64` |
+| client2     | eth0           | -           | `172.100.100.13/24` | `3fff:172:100:100::13/64` |
 |             | eth1           | leaf2       | `10.0.0.27/31`      | `1000:10:0:0::27/127`     |
-| client3     | eth0           | -           | `172.100.100.14/24` | `2001:172:100:100::14/64` |
+| client3     | eth0           | -           | `172.100.100.14/24` | `3fff:172:100:100::14/64` |
 |             | eth1           | leaf3       | `10.0.0.29/31`      | `1000:10:0:0::29/127`     |
-| client4     | eth0           | -           | `172.100.100.15/24` | `2001:172:100:100::15/64` |
+| client4     | eth0           | -           | `172.100.100.15/24` | `3fff:172:100:100::15/64` |
 |             | eth1           | leaf4       | `10.0.0.31/31`      | `1000:10:0:0::31/127`     |
 
 Configuration snippets that are used to provision the nodes are contained within the [`configs`](https://github.com/srl-labs/containerlab/tree/main/lab-examples/clos02/configs) subdirectory.
diff --git a/docs/lab-examples/peering-lab.md b/docs/lab-examples/peering-lab.md
index 7f11c7641..111e32bb8 100644
--- a/docs/lab-examples/peering-lab.md
+++ b/docs/lab-examples/peering-lab.md
@@ -185,10 +185,10 @@ Upon successful deployment, containerlab presents the lab summary table that con
 +---+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
 | # |      Name      | Container ID |             Image             |     Kind      |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
-| 1 | clab-ixp-peer1 | c9f5301899fb | sros:23.3.R1                  | vr-nokia_sros | running | 172.20.20.5/24 | 2001:172:20:20::5/64 |
-| 2 | clab-ixp-peer2 | 83da54ce9f7b | quay.io/frrouting/frr:8.4.1   | linux         | running | 172.20.20.3/24 | 2001:172:20:20::3/64 |
-| 3 | clab-ixp-rs1   | 701ee906f03f | quay.io/openbgpd/openbgpd:7.9 | linux         | running | 172.20.20.4/24 | 2001:172:20:20::4/64 |
-| 4 | clab-ixp-rs2   | 7de1a2f30d52 | ghcr.io/srl-labs/bird:2.13    | linux         | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
+| 1 | clab-ixp-peer1 | c9f5301899fb | sros:23.3.R1                  | vr-nokia_sros | running | 172.20.20.5/24 | 3fff:172:20:20::5/64 |
+| 2 | clab-ixp-peer2 | 83da54ce9f7b | quay.io/frrouting/frr:8.4.1   | linux         | running | 172.20.20.3/24 | 3fff:172:20:20::3/64 |
+| 3 | clab-ixp-rs1   | 701ee906f03f | quay.io/openbgpd/openbgpd:7.9 | linux         | running | 172.20.20.4/24 | 3fff:172:20:20::4/64 |
+| 4 | clab-ixp-rs2   | 7de1a2f30d52 | ghcr.io/srl-labs/bird:2.13    | linux         | running | 172.20.20.2/24 | 3fff:172:20:20::2/64 |
 +---+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
 ```
 
@@ -203,10 +203,10 @@ $ containerlab inspect --all
 +---+--------------+----------+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
 | # |  Topo Path   | Lab Name |      Name      | Container ID |             Image             |     Kind      |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+--------------+----------+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
-| 1 | ixp.clab.yml | ixp      | clab-ixp-peer1 | c9f5301899fb | sros:23.3.R1                  | vr-nokia_sros | running | 172.20.20.5/24 | 2001:172:20:20::5/64 |
-| 2 |              |          | clab-ixp-peer2 | 83da54ce9f7b | quay.io/frrouting/frr:8.4.1   | linux         | running | 172.20.20.3/24 | 2001:172:20:20::3/64 |
-| 3 |              |          | clab-ixp-rs1   | 701ee906f03f | quay.io/openbgpd/openbgpd:7.9 | linux         | running | 172.20.20.4/24 | 2001:172:20:20::4/64 |
-| 4 |              |          | clab-ixp-rs2   | 7de1a2f30d52 | ghcr.io/srl-labs/bird:2.13    | linux         | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
+| 1 | ixp.clab.yml | ixp      | clab-ixp-peer1 | c9f5301899fb | sros:23.3.R1                  | vr-nokia_sros | running | 172.20.20.5/24 | 3fff:172:20:20::5/64 |
+| 2 |              |          | clab-ixp-peer2 | 83da54ce9f7b | quay.io/frrouting/frr:8.4.1   | linux         | running | 172.20.20.3/24 | 3fff:172:20:20::3/64 |
+| 3 |              |          | clab-ixp-rs1   | 701ee906f03f | quay.io/openbgpd/openbgpd:7.9 | linux         | running | 172.20.20.4/24 | 3fff:172:20:20::4/64 |
+| 4 |              |          | clab-ixp-rs2   | 7de1a2f30d52 | ghcr.io/srl-labs/bird:2.13    | linux         | running | 172.20.20.2/24 | 3fff:172:20:20::2/64 |
 +---+--------------+----------+----------------+--------------+-------------------------------+---------------+---------+----------------+----------------------+
 ```
 
diff --git a/docs/manual/clabernetes/quickstart.md b/docs/manual/clabernetes/quickstart.md
index eb4f788c7..f8d4bb855 100644
--- a/docs/manual/clabernetes/quickstart.md
+++ b/docs/manual/clabernetes/quickstart.md
@@ -422,7 +422,7 @@ INFO[0000] Parsing & checking topology file: topo.clab.yaml
 +---+---------+--------------+-------------------------+-------+---------+----------------+----------------------+
 | # |  Name   | Container ID |          Image          | Kind  |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+---------+--------------+-------------------------+-------+---------+----------------+----------------------+
-| 1 | client1 | dbde60209a3b | ghcr.io/srl-labs/alpine | linux | running | 172.20.20.2/24 | 2001:172:20:20::2/64 |
+| 1 | client1 | dbde60209a3b | ghcr.io/srl-labs/alpine | linux | running | 172.20.20.2/24 | 3fff:172:20:20::2/64 |
 +---+---------+--------------+-------------------------+-------+---------+----------------+----------------------+
 ```
 
diff --git a/docs/manual/inventory.md b/docs/manual/inventory.md
index 16b84005e..9e9877cc1 100644
--- a/docs/manual/inventory.md
+++ b/docs/manual/inventory.md
@@ -179,7 +179,7 @@ Example of exported data when using default `auto.tmpl` template:
             "network": "clab",
             "bridge": "br-<...>",
             "ipv4-subnet": "172.20.20.0/24",
-            "ipv6-subnet": "2001:172:20:20::/64",
+            "ipv6-subnet": "3fff:172:20:20::/64",
             "mtu": "1500",
             "external-access": true
           },
@@ -200,7 +200,7 @@ Example of exported data when using default `auto.tmpl` template:
           "mgmt-intf": "",
           "mgmt-ipv4-address": "172.20.20.3",
           "mgmt-ipv4-prefix-length": 24,
-          "mgmt-ipv6-address": "2001:172:20:20::3",
+          "mgmt-ipv6-address": "3fff:172:20:20::3",
           "mgmt-ipv6-prefix-length": 64,
           "mac-address": "",
           "labels": {
@@ -227,7 +227,7 @@ Example of exported data when using default `auto.tmpl` template:
           "mgmt-intf": "",
           "mgmt-ipv4-address": "172.20.20.2",
           "mgmt-ipv4-prefix-length": 24,
-          "mgmt-ipv6-address": "2001:172:20:20::2",
+          "mgmt-ipv6-address": "3fff:172:20:20::2",
           "mgmt-ipv6-prefix-length": 64,
           "mac-address": "",
           "labels": {
diff --git a/docs/manual/kinds/ceos.md b/docs/manual/kinds/ceos.md
index 077a978a1..919f7b31e 100644
--- a/docs/manual/kinds/ceos.md
+++ b/docs/manual/kinds/ceos.md
@@ -79,7 +79,7 @@ When containerlab launches ceos node, it will set IPv4/6 addresses as assigned b
         link/ether 02:42:ac:14:14:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
         inet 172.20.20.2/24 brd 172.20.20.255 scope global eth0
         valid_lft forever preferred_lft forever
-        inet6 2001:172:20:20::2/80 scope global
+        inet6 3fff:172:20:20::2/80 scope global
         valid_lft forever preferred_lft forever
         inet6 fe80::42:acff:fe14:1402/64 scope link
         valid_lft forever preferred_lft forever
@@ -96,7 +96,7 @@ When containerlab launches ceos node, it will set IPv4/6 addresses as assigned b
     Interface       Status        MTU       IPv6 Address                     Addr State    Addr Source
     --------------- ------------ ---------- -------------------------------- ---------------- -----------
     Ma0             up           1500       fe80::42:acff:fe14:1402/64       up            link local
-                                            2001:172:20:20::2/80             up            config
+                                            3fff:172:20:20::2/80             up            config
     ```
     As you see, the management interface `Ma0` inherits the IP address that docker assigned to ceos container management interface.
 
diff --git a/docs/manual/kinds/crpd.md b/docs/manual/kinds/crpd.md
index 84377ee76..2de7d2022 100644
--- a/docs/manual/kinds/crpd.md
+++ b/docs/manual/kinds/crpd.md
@@ -64,7 +64,7 @@ When containerlab launches cRPD node, it will assign IPv4/6 address to the `eth0
         link/ether 02:42:ac:14:14:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
         inet 172.20.20.3/24 brd 172.20.20.255 scope global eth0
         valid_lft forever preferred_lft forever
-        inet6 2001:172:20:20::3/80 scope global nodad
+        inet6 3fff:172:20:20::3/80 scope global nodad
         valid_lft forever preferred_lft forever
         inet6 fe80::42:acff:fe14:1403/64 scope link
         valid_lft forever preferred_lft forever
@@ -92,7 +92,7 @@ When containerlab launches cRPD node, it will assign IPv4/6 address to the `eth0
                         INET6 fe80::b4d3:63ff:fef1:cb7b
     eth0             Up    ISO   enabled
                         INET  172.20.20.3
-                        INET6 2001:172:20:20::3
+                        INET6 3fff:172:20:20::3
                         INET6 fe80::42:acff:fe14:1403
     ```
     As you see, the management interface `eth0` inherits the IP address that docker assigned to cRPD container.
diff --git a/docs/manual/kinds/srl.md b/docs/manual/kinds/srl.md
index 2d91dc922..bce00f817 100644
--- a/docs/manual/kinds/srl.md
+++ b/docs/manual/kinds/srl.md
@@ -332,7 +332,7 @@ The certificate is generated for the following subjects (assuming node name is `
 DNS:srl
 DNS:clab-srl-srl
 DNS:srl.srl.io
-IP Address:172.20.20.3, IP Address:2001:172:20:20:0:0:0:3
+IP Address:172.20.20.3, IP Address:3fff:172:20:20:0:0:0:3
 ```
 
 Nokia SR Linux nodes support setting of [SANs](../nodes.md#subject-alternative-names-san).
diff --git a/docs/manual/network.md b/docs/manual/network.md
index 30e6d4713..29905ecf9 100644
--- a/docs/manual/network.md
+++ b/docs/manual/network.md
@@ -52,7 +52,7 @@ When no information about the management network is provided within the topo def
 The addressing information that containerlab will use on this network:
 
 * IPv4: subnet 172.20.20.0/24, gateway 172.20.20.1
-* IPv6: subnet 2001:172:20:20::/64, gateway 2001:172:20:20::1
+* IPv6: subnet 3fff:172:20:20::/64, gateway 3fff:172:20:20::1
 
 This management network will be configured with MTU value matching the value of a `docker0` host interface to match docker configuration on the system. This option is [configurable](#mtu).
 
@@ -65,8 +65,8 @@ With these defaults in place, the two containers from this lab will get connecte
 +---+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
 | # |      Name       | Container ID |  Image  | Kind | Group |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
-| 1 | clab-srl02-srl1 | ca24bf3d23f7 | srlinux | srl  |       | running | 172.20.20.3/24 | 2001:172:20:20::3/80 |
-| 2 | clab-srl02-srl2 | ee585eac9e65 | srlinux | srl  |       | running | 172.20.20.2/24 | 2001:172:20:20::2/80 |
+| 1 | clab-srl02-srl1 | ca24bf3d23f7 | srlinux | srl  |       | running | 172.20.20.3/24 | 3fff:172:20:20::3/80 |
+| 2 | clab-srl02-srl2 | ee585eac9e65 | srlinux | srl  |       | running | 172.20.20.2/24 | 3fff:172:20:20::2/80 |
 +---+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
 
 # addresses can also be fetched afterwards with `inspect` command
@@ -74,12 +74,12 @@ With these defaults in place, the two containers from this lab will get connecte
 +---+----------+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
 | # | Lab Name |      Name       | Container ID |  Image  | Kind | Group |  State  |  IPv4 Address  |     IPv6 Address     |
 +---+----------+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
-| 1 | srl02    | clab-srl02-srl1 | ca24bf3d23f7 | srlinux | srl  |       | running | 172.20.20.3/24 | 2001:172:20:20::3/80 |
-| 2 | srl02    | clab-srl02-srl2 | ee585eac9e65 | srlinux | srl  |       | running | 172.20.20.2/24 | 2001:172:20:20::2/80 |
+| 1 | srl02    | clab-srl02-srl1 | ca24bf3d23f7 | srlinux | srl  |       | running | 172.20.20.3/24 | 3fff:172:20:20::3/80 |
+| 2 | srl02    | clab-srl02-srl2 | ee585eac9e65 | srlinux | srl  |       | running | 172.20.20.2/24 | 3fff:172:20:20::2/80 |
 +---+----------+-----------------+--------------+---------+------+-------+---------+----------------+----------------------+
 ```
 
-The output above shows that srl1 container has been assigned `172.20.20.3/24 / 2001:172:20:20::3/80` IPv4/6 address. We can ensure this by querying the srl1 management interfaces address info:
+The output above shows that srl1 container has been assigned `172.20.20.3/24 / 3fff:172:20:20::3/80` IPv4/6 address. We can ensure this by querying the srl1 management interfaces address info:
 
 ```bash
 ❯ docker exec clab-srl02-srl1 ip address show dummy-mgmt0
@@ -87,7 +87,7 @@ The output above shows that srl1 container has been assigned `172.20.20.3/24 / 2
     link/ether 2a:66:2b:09:2e:4d brd ff:ff:ff:ff:ff:ff
     inet 172.20.20.3/24 brd 172.20.20.255 scope global dummy-mgmt0
        valid_lft forever preferred_lft forever
-    inet6 2001:172:20:20::3/80 scope global
+    inet6 3fff:172:20:20::3/80 scope global
        valid_lft forever preferred_lft forever
 ```
 
@@ -121,7 +121,7 @@ name: srl02
 mgmt:
   network: custom_mgmt                # management network name
   ipv4-subnet: 172.100.100.0/24       # ipv4 range
-  ipv6-subnet: 2001:172:100:100::/80  # ipv6 range (optional)
+  ipv6-subnet: 3fff:172:100:100::/80  # ipv6 range (optional)
 
 topology:
 # the rest of the file is omitted for brevity
@@ -139,14 +139,14 @@ For such cases, users can define the desired IPv4/6 addresses on a per-node basi
 mgmt:
   network: fixedips
   ipv4-subnet: 172.100.100.0/24
-  ipv6-subnet: 2001:172:100:100::/80
+  ipv6-subnet: 3fff:172:100:100::/80
 
 topology:
   nodes:
     n1:
       kind: nokia_srlinux
       mgmt-ipv4: 172.100.100.11       # set ipv4 address on management network
-      mgmt-ipv6: 2001:172:100:100::11 # set ipv6 address on management network
+      mgmt-ipv6: 3fff:172:100:100::11 # set ipv6 address on management network
 ```
 
 Users can specify either IPv4 or IPv6 or both addresses. If one of the addresses is omitted, it will be assigned by container runtime in an arbitrary fashion.
@@ -158,7 +158,7 @@ Users can specify either IPv4 or IPv6 or both addresses. If one of the addresses
 
 #### auto-assigned addresses
 
-The default network addresses chosen by containerlab - 172.20.20.0/24 and 2001:172:20:20::/64 - may clash with the existing addressing scheme on the lab host. With the [user-defined addresses](#user-defined-addresses) discussed above, users can avoid such conflicts, but this requires manual changes to the lab topology file and may not be convenient.
+The default network addresses chosen by containerlab - 172.20.20.0/24 and 3fff:172:20:20::/64 - may clash with the existing addressing scheme on the lab host. With the [user-defined addresses](#user-defined-addresses) discussed above, users can avoid such conflicts, but this requires manual changes to the lab topology file and may not be convenient.
 
 To address this issue, containerlab provides a way to automatically assign the management network v4/v6 addresses. This is achieved by setting the `ipv4-subnet` and/or `ipv6-subnet` to `auto`:
 
@@ -494,8 +494,8 @@ For a lab named `demo` with two nodes named `l1` and `l2` containerlab will crea
 ###### CLAB-demo-START ######
 172.20.20.2     clab-demo-l1
 172.20.20.3     clab-demo-l2
-2001:172:20:20::2       clab-demo-l1
-2001:172:20:20::3       clab-demo-l2
+3fff:172:20:20::2       clab-demo-l1
+3fff:172:20:20::3       clab-demo-l2
 ###### CLAB-demo-END ######
 ```
 
diff --git a/docs/manual/nodes.md b/docs/manual/nodes.md
index 9cb5c1178..0a9de97d8 100644
--- a/docs/manual/nodes.md
+++ b/docs/manual/nodes.md
@@ -451,7 +451,7 @@ Read more about user-defined management addresses [here](network.md#user-defined
 nodes:
     r1:
       kind: nokia_srlinux
-      mgmt_ipv6: 2001:172:20:20::100
+      mgmt_ipv6: 3fff:172:20:20::100
 ```
 
 ### DNS
diff --git a/docs/quickstart.md b/docs/quickstart.md
index b6494ce8f..f39edd175 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -130,8 +130,8 @@ The table will show the node name (which equals to container name), node kind, i
 +---+---------------------+--------------+-----------------------+---------------+---------+-----------------+----------------------+
 | # |        Name         | Container ID |         Image         |     Kind      |  State  |  IPv4 Address   |     IPv6 Address     |
 +---+---------------------+--------------+-----------------------+---------------+---------+-----------------+----------------------+
-| 1 | clab-srlceos01-ceos | 6ec1b1367a77 | ceos:4.32.0F          | arista_ceos   | running | 172.20.20.11/24 | 2001:172:20:20::b/64 |
-| 2 | clab-srlceos01-srl  | 6af1e33f4573 | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.10/24 | 2001:172:20:20::a/64 |
+| 1 | clab-srlceos01-ceos | 6ec1b1367a77 | ceos:4.32.0F          | arista_ceos   | running | 172.20.20.11/24 | 3fff:172:20:20::b/64 |
+| 2 | clab-srlceos01-srl  | 6af1e33f4573 | ghcr.io/nokia/srlinux | nokia_srlinux | running | 172.20.20.10/24 | 3fff:172:20:20::a/64 |
 +---+---------------------+--------------+-----------------------+---------------+---------+-----------------+----------------------+
 ```
 
diff --git a/docs/rn/0.26.md b/docs/rn/0.26.md
index 05fafd87d..e3d7f3cec 100644
--- a/docs/rn/0.26.md
+++ b/docs/rn/0.26.md
@@ -12,7 +12,7 @@ Little things with big impact - this is what SR Linux banner addition is. Starti
 
 ```
 ❯ ssh admin@clab-srl-srl
-Warning: Permanently added 'clab-srl-srl,2001:172:20:20::f' (ECDSA) to the list of known hosts.
+Warning: Permanently added 'clab-srl-srl,3fff:172:20:20::f' (ECDSA) to the list of known hosts.
 ................................................................
 :                  Welcome to Nokia SR Linux!                  :
 :              Open Network OS for the NetOps era.             :
diff --git a/lab-examples/clos02/README.md b/lab-examples/clos02/README.md
index 4c7aa845f..6bf1b82d1 100644
--- a/lab-examples/clos02/README.md
+++ b/lab-examples/clos02/README.md
@@ -24,59 +24,59 @@ $ ./setup.sh
 
 | Source      | Interface      | Towards     | IPv4             | IPv4 Prefix | IPv6                   | IPv6 Prefix |
 | ----------- | -------------- | ----------- | ---------------- | ----------- | ---------------------- | ----------- |
-| leaf1       | mgmt0.0        | -           | `172.100.100.2 ` | 24          | `2001:172:100:100::2 ` | 64          |
+| leaf1       | mgmt0.0        | -           | `172.100.100.2 ` | 24          | `3fff:172:100:100::2 ` | 64          |
 |             | system0.0      | -           | `30.0.0.1      ` | 32          | `3000:30:0:0::1      ` | 128         |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.0      ` | 31          | `1000:10:0:0::0      ` | 127         |
 |             | ethernet-1/2.0 | spine2      | `10.0.0.2      ` | 31          | `1000:10:0:0::2      ` | 127         |
 |             | ethernet-1/3.0 | client1     | `10.0.0.24     ` | 31          | `1000:10:0:0::24     ` | 127         |
-| leaf2       | mgmt0.0        | -           | `172.100.100.3 ` | 24          | `2001:172:100:100::3 ` | 64          |
+| leaf2       | mgmt0.0        | -           | `172.100.100.3 ` | 24          | `3fff:172:100:100::3 ` | 64          |
 |             | system0.0      | -           | `30.0.0.2      ` | 32          | `3000:30:0:0::2      ` | 128         |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.4      ` | 31          | `1000:10:0:0::4      ` | 127         |
 |             | ethernet-1/2.0 | spine2      | `10.0.0.6      ` | 31          | `1000:10:0:0::6      ` | 127         |
 |             | ethernet-1/3.0 | client2     | `10.0.0.26     ` | 31          | `1000:10:0:0::26     ` | 127         |
-| leaf3       | mgmt0.0        | -           | `172.100.100.4 ` | 24          | `2001:172:100:100::4 ` | 64          |
+| leaf3       | mgmt0.0        | -           | `172.100.100.4 ` | 24          | `3fff:172:100:100::4 ` | 64          |
 |             | system0.0      | -           | `30.0.0.3      ` | 32          | `3000:30:0:0::3      ` | 128         |
 |             | ethernet-1/1.0 | spine3      | `10.0.0.12     ` | 31          | `1000:10:0:0::12     ` | 127         |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.14     ` | 31          | `1000:10:0:0::14     ` | 127         |
 |             | ethernet-1/3.0 | client3     | `10.0.0.28     ` | 31          | `1000:10:0:0::28     ` | 127         |
-| leaf4       | mgmt0.0        | -           | `172.100.100.5 ` | 24          | `2001:172:100:100::5 ` | 64          |
+| leaf4       | mgmt0.0        | -           | `172.100.100.5 ` | 24          | `3fff:172:100:100::5 ` | 64          |
 |             | system0.0      | -           | `30.0.0.4      ` | 32          | `3000:30:0:0::4      ` | 128         |
 |             | ethernet-1/1.0 | spine3      | `10.0.0.16     ` | 31          | `1000:10:0:0::16     ` | 127         |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.18     ` | 31          | `1000:10:0:0::18     ` | 127         |
 |             | ethernet-1/3.0 | client4     | `10.0.0.30     ` | 31          | `1000:10:0:0::30     ` | 127         |
-| spine1      | mgmt0.0        | -           | `172.100.100.6 ` | 24          | `2001:172:100:100::6 ` | 64          |
+| spine1      | mgmt0.0        | -           | `172.100.100.6 ` | 24          | `3fff:172:100:100::6 ` | 64          |
 |             | system0.0      | -           | `30.0.0.5      ` | 32          | `3000:30:0:0::5      ` | 128         |
 |             | ethernet-1/1.0 | leaf1       | `10.0.0.1      ` | 31          | `1000:10:0:0::1      ` | 127         |
 |             | ethernet-1/2.0 | leaf2       | `10.0.0.5      ` | 31          | `1000:10:0:0::5      ` | 127         |
 |             | ethernet-1/3.0 | superspine1 | `10.0.0.8      ` | 31          | `1000:10:0:0::8      ` | 127         |
-| spine2      | mgmt0.0        | -           | `172.100.100.7 ` | 24          | `2001:172:100:100::7 ` | 64          |
+| spine2      | mgmt0.0        | -           | `172.100.100.7 ` | 24          | `3fff:172:100:100::7 ` | 64          |
 |             | system0.0      | -           | `30.0.0.6      ` | 32          | `3000:30:0:0::6      ` | 128         |
 |             | ethernet-1/1.0 | leaf1       | `10.0.0.3      ` | 31          | `1000:10:0:0::3      ` | 127         |
 |             | ethernet-1/2.0 | leaf2       | `10.0.0.7      ` | 31          | `1000:10:0:0::7      ` | 127         |
 |             | ethernet-1/3.0 | superspine2 | `10.0.0.10     ` | 31          | `1000:10:0:0::10     ` | 127         |
-| spine3      | mgmt0.0        | -           | `172.100.100.8 ` | 24          | `2001:172:100:100::8 ` | 64          |
+| spine3      | mgmt0.0        | -           | `172.100.100.8 ` | 24          | `3fff:172:100:100::8 ` | 64          |
 |             | system0.0      | -           | `30.0.0.7      ` | 32          | `3000:30:0:0::7      ` | 128         |
 |             | ethernet-1/1.0 | leaf3       | `10.0.0.13     ` | 31          | `1000:10:0:0::13     ` | 127         |
 |             | ethernet-1/2.0 | leaf4       | `10.0.0.17     ` | 31          | `1000:10:0:0::17     ` | 127         |
 |             | ethernet-1/3.0 | superspine1 | `10.0.0.20     ` | 31          | `1000:10:0:0::20     ` | 127         |
-| spine4      | mgmt0.0        | -           | `172.100.100.9 ` | 24          | `2001:172:100:100::9 ` | 64          |
+| spine4      | mgmt0.0        | -           | `172.100.100.9 ` | 24          | `3fff:172:100:100::9 ` | 64          |
 |             | system0.0      | -           | `30.0.0.8      ` | 32          | `3000:30:0:0::8      ` | 128         |
 |             | ethernet-1/1.0 | leaf3       | `10.0.0.15     ` | 31          | `1000:10:0:0::15     ` | 127         |
 |             | ethernet-1/2.0 | leaf4       | `10.0.0.19     ` | 31          | `1000:10:0:0::19     ` | 127         |
 |             | ethernet-1/3.0 | superspine2 | `10.0.0.22     ` | 31          | `1000:10:0:0::22     ` | 127         |
-| superspine1 | mgmt0.0        | -           | `172.100.100.10` | 24          | `2001:172:100:100::10` | 64          |
+| superspine1 | mgmt0.0        | -           | `172.100.100.10` | 24          | `3fff:172:100:100::10` | 64          |
 |             | system0.0      | -           | `30.0.0.9      ` | 32          | `3000:30:0:0::9      ` | 128         |
 |             | ethernet-1/1.0 | spine1      | `10.0.0.9      ` | 31          | `1000:10:0:0::9      ` | 127         |
 |             | ethernet-1/2.0 | spine3      | `10.0.0.21     ` | 31          | `1000:10:0:0::21     ` | 127         |
-| superspine2 | mgmt0.0        | -           | `172.100.100.11` | 24          | `2001:172:100:100::11` | 64          |
+| superspine2 | mgmt0.0        | -           | `172.100.100.11` | 24          | `3fff:172:100:100::11` | 64          |
 |             | system0.0      | -           | `30.0.0.10     ` | 32          | `3000:30:0:0::10     ` | 128         |
 |             | ethernet-1/1.0 | spine2      | `10.0.0.11     ` | 31          | `1000:10:0:0::11     ` | 127         |
 |             | ethernet-1/2.0 | spine4      | `10.0.0.23     ` | 31          | `1000:10:0:0::23     ` | 127         |
-| client1     | eth0           | -           | `172.100.100.12` | 24          | `2001:172:100:100::12` | 64          |
+| client1     | eth0           | -           | `172.100.100.12` | 24          | `3fff:172:100:100::12` | 64          |
 |             | eth1           | leaf1       | `10.0.0.25     ` | 31          | `1000:10:0:0::25     ` | 127         |
-| client2     | eth0           | -           | `172.100.100.13` | 24          | `2001:172:100:100::13` | 64          |
+| client2     | eth0           | -           | `172.100.100.13` | 24          | `3fff:172:100:100::13` | 64          |
 |             | eth1           | leaf2       | `10.0.0.27     ` | 31          | `1000:10:0:0::27     ` | 127         |
-| client3     | eth0           | -           | `172.100.100.14` | 24          | `2001:172:100:100::14` | 64          |
+| client3     | eth0           | -           | `172.100.100.14` | 24          | `3fff:172:100:100::14` | 64          |
 |             | eth1           | leaf3       | `10.0.0.29     ` | 31          | `1000:10:0:0::29     ` | 127         |
-| client4     | eth0           | -           | `172.100.100.15` | 24          | `2001:172:100:100::15` | 64          |
+| client4     | eth0           | -           | `172.100.100.15` | 24          | `3fff:172:100:100::15` | 64          |
 |             | eth1           | leaf4       | `10.0.0.31     ` | 31          | `1000:10:0:0::31     ` | 127         |
diff --git a/lab-examples/clos02/setup.clos02.clab.yml b/lab-examples/clos02/setup.clos02.clab.yml
index 893449f45..ab4b671ad 100644
--- a/lab-examples/clos02/setup.clos02.clab.yml
+++ b/lab-examples/clos02/setup.clos02.clab.yml
@@ -3,7 +3,7 @@ name: clos02
 mgmt:
   network: br-clos02
   ipv4-subnet: 172.100.100.0/24
-  ipv6-subnet: 2001:172:100:100::0/64
+  ipv6-subnet: 3fff:172:100:100::0/64
 
 topology:
   kinds:
@@ -15,68 +15,68 @@ topology:
     leaf1:
       kind: nokia_srlinux
       mgmt-ipv4: 172.100.100.2
-      mgmt-ipv6: 2001:172:100:100::2
+      mgmt-ipv6: 3fff:172:100:100::2
     leaf2:
       kind: nokia_srlinux
       mgmt-ipv4: 172.100.100.3
-      mgmt-ipv6: 2001:172:100:100::3
+      mgmt-ipv6: 3fff:172:100:100::3
     leaf3:
       kind: nokia_srlinux
       mgmt-ipv4: 172.100.100.4
-      mgmt-ipv6: 2001:172:100:100::4
+      mgmt-ipv6: 3fff:172:100:100::4
     leaf4:
       kind: nokia_srlinux
       mgmt-ipv4: 172.100.100.5
-      mgmt-ipv6: 2001:172:100:100::5
+      mgmt-ipv6: 3fff:172:100:100::5
 
     spine1:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.6
-      mgmt-ipv6: 2001:172:100:100::6
+      mgmt-ipv6: 3fff:172:100:100::6
     spine2:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.7
-      mgmt-ipv6: 2001:172:100:100::7
+      mgmt-ipv6: 3fff:172:100:100::7
     spine3:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.8
-      mgmt-ipv6: 2001:172:100:100::8
+      mgmt-ipv6: 3fff:172:100:100::8
     spine4:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.9
-      mgmt-ipv6: 2001:172:100:100::9
+      mgmt-ipv6: 3fff:172:100:100::9
 
     superspine1:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.10
-      mgmt-ipv6: 2001:172:100:100::10
+      mgmt-ipv6: 3fff:172:100:100::10
     superspine2:
       kind: nokia_srlinux
       type: ixrd3
       mgmt-ipv4: 172.100.100.11
-      mgmt-ipv6: 2001:172:100:100::11
+      mgmt-ipv6: 3fff:172:100:100::11
 
     client1:
       kind: linux
       mgmt-ipv4: 172.100.100.12
-      mgmt-ipv6: 2001:172:100:100::12
+      mgmt-ipv6: 3fff:172:100:100::12
     client2:
       kind: linux
       mgmt-ipv4: 172.100.100.13
-      mgmt-ipv6: 2001:172:100:100::13
+      mgmt-ipv6: 3fff:172:100:100::13
     client3:
       kind: linux
       mgmt-ipv4: 172.100.100.14
-      mgmt-ipv6: 2001:172:100:100::14
+      mgmt-ipv6: 3fff:172:100:100::14
     client4:
       kind: linux
       mgmt-ipv4: 172.100.100.15
-      mgmt-ipv6: 2001:172:100:100::15
+      mgmt-ipv6: 3fff:172:100:100::15
 
   links:
     - endpoints: ["leaf1:e1-1", "spine1:e1-1"]
diff --git a/lab-examples/templated01/topology_config.gotmpl b/lab-examples/templated01/topology_config.gotmpl
index fe79299e7..f320adf1b 100644
--- a/lab-examples/templated01/topology_config.gotmpl
+++ b/lab-examples/templated01/topology_config.gotmpl
@@ -10,7 +10,7 @@ clab-templated01-{{ $input.spines.prefix }}{{ $spineIndex }}:
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 75.{{ $spineIndex }}.{{ $leafIndex }}.0/31
-          ipv6_address: 2001:75:{{ $spineIndex }}:{{ $leafIndex }}::0/127
+          ipv6_address: 3fff:75:{{ $spineIndex }}:{{ $leafIndex }}::0/127
     {{- end }}
     - name: lo0
       admin_state: "enable"
@@ -32,7 +32,7 @@ clab-templated01-{{ $input.leaves.prefix }}{{ $leafIndex }}:
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 75.{{ $spineIndex }}.{{ $leafIndex }}.1/31
-          ipv6_address: 2001:75:{{ $spineIndex }}:{{ $leafIndex }}::1/127
+          ipv6_address: 3fff:75:{{ $spineIndex }}:{{ $leafIndex }}::1/127
   {{- end }}
     - name: lo0
       admin_state: "enable"
diff --git a/lab-examples/templated02/topology_config.gotmpl b/lab-examples/templated02/topology_config.gotmpl
index 7420e8c01..59b1a0956 100644
--- a/lab-examples/templated02/topology_config.gotmpl
+++ b/lab-examples/templated02/topology_config.gotmpl
@@ -12,7 +12,7 @@ clab-templated02-{{ $input.super_spines.prefix }}{{ $ssIndex }}:
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 75.{{ $ssIndex }}.{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}.0/31
-          ipv6_address: 2001:75:{{ $ssIndex }}:{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}::0/127
+          ipv6_address: 3fff:75:{{ $ssIndex }}:{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}::0/127
     {{- end }}
   {{- end }}
     - name: lo0
@@ -38,7 +38,7 @@ clab-templated02-{{ $input.pods.spines.prefix }}{{ $podIndex }}-{{ $spineIndex }
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 75.{{ $ssIndex }}.{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}.1/31
-          ipv6_address: 2001:75:{{ $ssIndex }}:{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}::1/127
+          ipv6_address: 3fff:75:{{ $ssIndex }}:{{ add (mul (add $podIndex -1) $input.pods.spines.num) $spineIndex }}::1/127
     {{- end }}
   {{- range $leafIndex := seq 1 $input.pods.leaves.num  }}
     - name: ethernet-1/{{ add $input.super_spines.num $leafIndex }}
@@ -48,7 +48,7 @@ clab-templated02-{{ $input.pods.spines.prefix }}{{ $podIndex }}-{{ $spineIndex }
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 76.{{ $podIndex }}.{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}.1/31
-          ipv6_address: 2001:76:{{ $podIndex }}:{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}::1/127
+          ipv6_address: 3fff:76:{{ $podIndex }}:{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}::1/127
   {{- end }}
     - name: lo0
       admin_state: "enable"
@@ -83,7 +83,7 @@ clab-templated02-{{ $input.pods.leaves.prefix }}{{ $podIndex }}-{{ $leafIndex }}
         - admin_state: "enable"
           ip_mtu: 1500
           ipv4_address: 76.{{ $podIndex }}.{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}.0/31
-          ipv6_address: 2001:76:{{ $podIndex }}:{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}::0/127
+          ipv6_address: 3fff:76:{{ $podIndex }}:{{ add (mul (add $spineIndex -1) $input.pods.leaves.num) $leafIndex }}::0/127
     {{- end }}
     - name: lo0
       admin_state: "enable"
diff --git a/schemas/clab.schema.json b/schemas/clab.schema.json
index cce78d336..22fb6f497 100644
--- a/schemas/clab.schema.json
+++ b/schemas/clab.schema.json
@@ -797,8 +797,8 @@
                     "pattern": "(^.+\/[0-9]{1,2}$)|(auto)"
                 },
                 "ipv6-subnet": {
-                    "description": "IPv6 subnet to use for the custom management network. e.g. 2001:172:100:100::/64",
-                    "markdownDescription": "[IPv6 subnet](https://containerlab.dev/manual/network/#user-defined-addresses) to be used for the custom management network. e.g. 2001:172:100:100::/64",
+                    "description": "IPv6 subnet to use for the custom management network. e.g. 3fff:172:100:100::/64",
+                    "markdownDescription": "[IPv6 subnet](https://containerlab.dev/manual/network/#user-defined-addresses) to be used for the custom management network. e.g. 3fff:172:100:100::/64",
                     "type": "string",
                     "pattern": "(^.+\/[0-9]{1,3}$)|(auto)"
                 },
@@ -821,8 +821,8 @@
                     "pattern": "^.+\/[0-9]{1,2}$"
                 },
                 "ipv6-range": {
-                    "description": "IPv6 range out of the ipv6-subnet to use for the custom management network. e.g. 2001:172:100:100:8000::/65",
-                    "markdownDescription": "[IPv6 range](https://containerlab.dev/manual/network/#ip-range) out of the ipv6-subnet to use for the custom management network. e.g. 2001:172:100:100:8000::/65",
+                    "description": "IPv6 range out of the ipv6-subnet to use for the custom management network. e.g. 3fff:172:100:100:8000::/65",
+                    "markdownDescription": "[IPv6 range](https://containerlab.dev/manual/network/#ip-range) out of the ipv6-subnet to use for the custom management network. e.g. 3fff:172:100:100:8000::/65",
                     "type": "string",
                     "pattern": "^((:|[0-9a-fA-F]{0,4}):)([0-9a-fA-F]{0,4}:){0,5}((([0-9a-fA-F]{0,4}:)?(:|[0-9a-fA-F]{0,4}))|(((25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])))(%[\\p{N}\\p{L}]+)?$"
                 },
diff --git a/tests/01-smoke/01-basic-flow.robot b/tests/01-smoke/01-basic-flow.robot
index 99cf377dc..bc610686a 100644
--- a/tests/01-smoke/01-basic-flow.robot
+++ b/tests/01-smoke/01-basic-flow.robot
@@ -15,7 +15,7 @@ ${runtime}                  docker
 # defaults to docker exec. Will be rewritten to containerd `ctr` if needed in "Define runtime exec" test
 ${runtime-cli-exec-cmd}     sudo docker exec
 ${n2-ipv4}                  172.20.20.100/24
-${n2-ipv6}                  2001:172:20:20::100/64
+${n2-ipv6}                  3fff:172:20:20::100/64
 
 
 *** Test Cases ***
diff --git a/tests/01-smoke/01-linux-nodes.clab.yml b/tests/01-smoke/01-linux-nodes.clab.yml
index 3e72ec711..d501e81e6 100644
--- a/tests/01-smoke/01-linux-nodes.clab.yml
+++ b/tests/01-smoke/01-linux-nodes.clab.yml
@@ -21,7 +21,7 @@ topology:
       cpu: 1.5
       memory: 1G
       mgmt_ipv4: 172.20.20.99 # test deprecated mgmt_ipv4 still works
-      mgmt_ipv6: 2001:172:20:20::99 # test deprecated mgmt_ipv6 still works
+      mgmt_ipv6: 3fff:172:20:20::99 # test deprecated mgmt_ipv6 still works
       healthcheck:
         test:
           - CMD-SHELL
@@ -37,7 +37,7 @@ topology:
       ports:
         - 56180:80
       mgmt-ipv4: 172.20.20.100
-      mgmt-ipv6: 2001:172:20:20::100
+      mgmt-ipv6: 3fff:172:20:20::100
       dns:
         servers:
           - 8.8.8.8