Redistribution from BGP to ISIS fails after frr restart

[alex4871095]

---

Describe the bug

Redistribution from BGP to ISIS fails after frr restart

• [x ] Did you check if this is a duplicate issue?
• [] Did you test it on the latest FRRouting/frr master branch?

To Reproduce

systemctl restart frr
vtysh

Hello, this is FRRouting (version 9.1).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

tn3# show isis database detail tn3.00-00
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
tn3.00-00 * 152 0x000000d7 0x02b9 1154 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: tn3
TE Router ID: 192.168.58.13
Router Capability: 192.168.58.13 , D:0, S:0
Segment Routing: I:1 V:1, Global Block Base: 10000 Range: 40001
SR Local Block Base: 60000 Range: 40001
SR Algorithm:
0: SPF
Node Maximum SID Depth: 16
Extended Reachability: 0000.0000.0001.00 (Metric: 10)
Adjacency-SID: 60000, Weight: 0, Flags: F:1 B:0, V:1, L:1, S:0, P:0
IPv4 Interface Address: 192.168.58.13
IPv6 Reachability: fd00:db01::1/128 (Metric: 10)
Subtlvs:
SR Prefix-SID Index: 103, Algorithm: 0, Flags: NODE PHP

tn3#
tn3# show ipv6 route fd00:dc01::1/128
Routing entry for fd00:dc01::1/128
Known via "bgp", distance 20, metric 0, best
Last update 00:00:19 ago

• fe80::3eec:efff:fe5f:781e, via vlan1951, weight 1

tn3#
tn3# show run isisd
Building configuration...

Current configuration:
!
frr version 9.1
frr defaults traditional
hostname tn3
log syslog informational
service integrated-vtysh-config
!
interface lo
ipv6 router isis myisis
isis passive
exit
!
interface vlan1919
ipv6 router isis myisis
isis bfd
isis bfd profile bfdisis
isis circuit-type level-1
isis fast-reroute ti-lfa level-1
isis hello-interval 1
isis hello-multiplier 3
isis network point-to-point
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0003.00
lsp-timers gen-interval 1 refresh-interval 900 max-lifetime 1200
spf-delay-ietf init-delay 50 short-delay 100 long-delay 500 holddown 3000 time-to-learn 4000
redistribute ipv6 bgp level-1 route-map bgp2isis6
segment-routing on
segment-routing global-block 10000 50000 local-block 60000 100000
segment-routing node-msd 16
segment-routing prefix fd00:db01::1/128 index 103
segment-routing prefix fd00:dc01::1/128 index 104
exit
!
ipv6 prefix-list SPL seq 5 permit fd00:db01::1/128
ipv6 prefix-list SPL seq 10 permit fd00:de01::1/128
ipv6 prefix-list GPL seq 5 permit fd00:dc01::1/128
!
route-map PASS_ALL permit 10
exit
!
route-map bgp2isis6 permit 10
match ipv6 address prefix-list GPL
exit
!
route-map isis2bgp6 permit 10
match ipv6 address prefix-list SPL
exit
!
route-map bgp2isis6_high_metric permit 10
set metric 10000
exit
!
route-map INGRESS permit 10
exit
!
route-map EGRESS permit 10
exit
!
end
tn3# conf t
tn3(config)# router isis myisis
tn3(config-router)# no redistribute ipv6 bgp level-1 route-map bgp2isis6
tn3(config-router)# redistribute ipv6 bgp level-1 route-map bgp2isis6
tn3(config-router)# end
tn3#
tn3# show isis database detail tn3.00-00
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
tn3.00-00 * 183 0x000000d9 0x1a09 1142 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: tn3
TE Router ID: 192.168.58.13
Router Capability: 192.168.58.13 , D:0, S:0
Segment Routing: I:1 V:1, Global Block Base: 10000 Range: 40001
SR Local Block Base: 60000 Range: 40001
SR Algorithm:
0: SPF
Node Maximum SID Depth: 16
Extended Reachability: 0000.0000.0001.00 (Metric: 10)
Adjacency-SID: 60000, Weight: 0, Flags: F:1 B:0, V:1, L:1, S:0, P:0
IPv4 Interface Address: 192.168.58.13
IPv6 Reachability: fd00:db01::1/128 (Metric: 10)
Subtlvs:
SR Prefix-SID Index: 103, Algorithm: 0, Flags: NODE PHP
IPv6 Reachability: fd00:dc01::1/128 (Metric: 0)
Subtlvs:
SR Prefix-SID Index: 104, Algorithm: 0, Flags: READVERTISED PHP

tn3#

Expected behavior

I would expect that prefix fd00:dc01::1/128 learnt by BGP is advertised to ISIS domain

Screenshots

Versions

• OS Version: Ubuntu 20.04.5 LTS

• Kernel: 5.15.91

• FRR Version: 9.1

Additional context

tn3# show version
FRRouting 9.1 (tn3) on Linux(5.15.91).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--localstatedir=/var/run/frr' '--sbindir=/usr/lib/frr' '--sysconfdir=/etc/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--enable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'
tn3#
tn3# show daemons
mgmtd zebra bgpd isisd watchfrr staticd bfdd pathd
tn3#
tn3# show runn
Building configuration...

Current configuration:
!
frr version 9.1
frr defaults traditional
hostname tn3
log syslog informational
service integrated-vtysh-config
!
interface lo
ipv6 router isis myisis
isis passive
mpls enable
exit
!
interface vlan1919
ipv6 nd ra-interval msec 500
ipv6 router isis myisis
isis bfd
isis bfd profile bfdisis
isis circuit-type level-1
isis fast-reroute ti-lfa level-1
isis hello-interval 1
isis hello-multiplier 3
isis network point-to-point
mpls enable
exit
!
interface vlan1920
mpls enable
exit
!
interface vlan1951
ipv6 nd ra-interval msec 500
exit
!
router bgp 65534
bgp router-id 192.168.58.13
no bgp default ipv4-unicast
neighbor vlan1951 interface remote-as 65535
neighbor vlan1951 bfd
neighbor vlan1951 bfd profile bfdbgp
neighbor vlan1951 timers connect 1
!
address-family ipv6 unicast
network fd00:db01::1/128
redistribute isis route-map isis2bgp6
neighbor vlan1951 activate
neighbor vlan1951 route-map PASS_ALL in
neighbor vlan1951 route-map PASS_ALL out
exit-address-family
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0003.00
lsp-timers gen-interval 1 refresh-interval 900 max-lifetime 1200
spf-delay-ietf init-delay 50 short-delay 100 long-delay 500 holddown 3000 time-to-learn 4000
redistribute ipv6 bgp level-1 route-map bgp2isis6
segment-routing on
segment-routing global-block 10000 50000 local-block 60000 100000
segment-routing node-msd 16
segment-routing prefix fd00:db01::1/128 index 103
segment-routing prefix fd00:dc01::1/128 index 104
exit
!
ipv6 prefix-list SPL seq 5 permit fd00:db01::1/128
ipv6 prefix-list SPL seq 10 permit fd00:de01::1/128
ipv6 prefix-list GPL seq 5 permit fd00:dc01::1/128
!
route-map PASS_ALL permit 10
exit
!
route-map bgp2isis6 permit 10
match ipv6 address prefix-list GPL
exit
!
route-map isis2bgp6 permit 10
match ipv6 address prefix-list SPL
exit
!
route-map bgp2isis6_high_metric permit 10
set metric 10000
exit
!
route-map INGRESS permit 10
set distance 250
exit
!
route-map EGRESS permit 10
set community 65534:90
exit
!
segment-routing
traffic-eng
exit
exit
!
bfd
profile bfdbgp
transmit-interval 100
receive-interval 100
exit
!
profile bfdisis
transmit-interval 100
receive-interval 100
exit
!
exit
!
end
tn3#

[riw777]

A couple of questions ...

1. What does the rest of this topology look like?
2. Have you tried this without access lists? They might be blocking the redistribution for some reason ... it would be good to know whether the problem is there.
3. Does this happen without the SR configuration? i.e., plain BGP and IS-IS?

[alex4871095]

Hi Russ, nice to hear you! Sorry for late reply.. I've just re-checked the issue on FRR 10.0. Topology is as simple as possible - FRR1 and FRR2 directly connected, and announces it's own loopbacks by BGP unnumbered session. Also i removed almost all the stuff from configs trying to identify the issue, and now it seems like the issue is somehow connected with route-map processing.
Here it is all the logs:

root@frr1:~# vtysh

Hello, this is FRRouting (version 10.0).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

frr1# show version
FRRouting 10.0 (frr1) on Linux(5.15.91).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--sbindir=/usr/lib/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--enable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'
frr1# show daemons
mgmtd zebra bgpd isisd watchfrr staticd bfdd
frr1# show runn
Building configuration...

Current configuration:
!
frr version 10.0
frr defaults traditional
hostname frr1
service integrated-vtysh-config
!
interface eth1
ipv6 nd ra-interval msec 500
exit
!
interface lo
ipv6 router isis myisis
isis passive
exit
!
router bgp 65535
bgp router-id 172.20.20.24
no bgp default ipv4-unicast
neighbor eth1 interface remote-as 65534
!
address-family ipv6 unicast
network fd00:100::1/128
redistribute isis
neighbor eth1 activate
neighbor eth1 route-map PASS_ALL in
neighbor eth1 route-map PASS_ALL out
exit-address-family
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0001.00
redistribute ipv6 bgp level-1
exit
!
route-map PASS_ALL permit 10
exit
!
end
frr1# show bgp ipv6 unicast summary
BGP router identifier 172.20.20.24, local AS number 65535 VRF default vrf-id 0
BGP table version 2
RIB entries 3, using 288 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
eth1 4 65534 9 8 2 0 0 00:00:25 1 2 N/A

Total number of neighbors 1
frr1# show bgp ipv6 unicast
BGP table version is 2, local router ID is 172.20.20.24, vrf id 0
Default local pref 100, local AS 65535
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network          Next Hop            Metric LocPrf Weight Path

*> fd00:100::1/128 :: 0 32768 i
*> fd00:200::1/128 eth1 0 0 65534 i

Displayed 2 routes and 2 total paths
frr1# show ipv6 route
Codes: K - kernel route, C - connected, L - local, S - static,
R - RIPng, O - OSPFv3, I - IS-IS, B - BGP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric, t - Table-Direct,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure

K>* ::/0 [0/1024] via 2001:172:20:20::1, eth0, 00:00:38
C>* 2001:172:20:20::/64 is directly connected, eth0, 00:00:38
L>* 2001:172:20:20::18/128 is directly connected, eth0, 00:00:38
L * fd00:100::1/128 is directly connected, lo, 00:00:38
C>* fd00:100::1/128 is directly connected, lo, 00:00:38
B>* fd00:200::1/128 [20/0] via fe80::a8c1:abff:fe11:9c97, eth1, weight 1, 00:00:32
C * fe80::/64 is directly connected, eth1, 00:00:38
C>* fe80::/64 is directly connected, eth0, 00:00:38
frr1# show isis database detail
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
frr1.00-00 * 119 0x00000002 0xa29f 1177 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: frr1
TE Router ID: 172.20.20.24
Router Capability: 172.20.20.24 , D:0, S:0
IPv4 Interface Address: 172.20.20.24
IPv6 Reachability: fd00:100::1/128 (Metric: 10)
Subtlvs:
IPv6 Reachability: fd00:200::1/128 (Metric: 0)
Subtlvs:

1 LSPs

frr1#
root@frr1:~# /etc/init.d/frr stop

• Stopped watchfrr
• Stopped bfdd
• Stopped staticd
• Stopped isisd
• Stopped bgpd
• Stopped zebra
• Stopped mgmtd
  root@frr1:# ps -elf | grep frr
  0 S root 3786 3496 0 80 0 - 1006 pipe_r 11:01 pts/1 00:00:00 grep --color=auto frr
  root@frr1:# /etc/init.d/frr start
• Starting watchfrr with command: ' /usr/lib/frr/watchfrr -d -F traditional zebra mgmtd bgpd isisd staticd bfdd'
• Started watchfrr
  root@frr1:~# vtysh

Hello, this is FRRouting (version 10.0).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

frr1# show version
FRRouting 10.0 (frr1) on Linux(5.15.91).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--sbindir=/usr/lib/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--enable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'
frr1# show daemons
mgmtd zebra bgpd isisd watchfrr staticd bfdd
frr1# show runn
Building configuration...

Current configuration:
!
frr version 10.0
frr defaults traditional
hostname frr1
service integrated-vtysh-config
!
interface eth1
ipv6 nd ra-interval msec 500
exit
!
interface lo
ipv6 router isis myisis
isis passive
exit
!
router bgp 65535
bgp router-id 172.20.20.24
no bgp default ipv4-unicast
neighbor eth1 interface remote-as 65534
!
address-family ipv6 unicast
network fd00:100::1/128
redistribute isis
neighbor eth1 activate
neighbor eth1 route-map PASS_ALL in
neighbor eth1 route-map PASS_ALL out
exit-address-family
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0001.00
redistribute ipv6 bgp level-1
exit
!
route-map PASS_ALL permit 10
exit
!
end
frr1# show bgp ipv6 unicast summary
BGP router identifier 172.20.20.24, local AS number 65535 VRF default vrf-id 0
BGP table version 2
RIB entries 3, using 288 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
eth1 4 65534 9 8 2 0 0 00:00:20 1 2 N/A

Total number of neighbors 1
frr1# show bgp ipv6 unicast
BGP table version is 2, local router ID is 172.20.20.24, vrf id 0
Default local pref 100, local AS 65535
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network          Next Hop            Metric LocPrf Weight Path

*> fd00:100::1/128 :: 0 32768 i
*> fd00:200::1/128 eth1 0 0 65534 i

Displayed 2 routes and 2 total paths
frr1# show ipv6 route
Codes: K - kernel route, C - connected, L - local, S - static,
R - RIPng, O - OSPFv3, I - IS-IS, B - BGP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric, t - Table-Direct,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure

K>* ::/0 [0/1024] via 2001:172:20:20::1, eth0, 00:00:33
C>* 2001:172:20:20::/64 is directly connected, eth0, 00:00:33
L>* 2001:172:20:20::18/128 is directly connected, eth0, 00:00:33
L * fd00:100::1/128 is directly connected, lo, 00:00:33
C>* fd00:100::1/128 is directly connected, lo, 00:00:33
B>* fd00:200::1/128 [20/0] via fe80::a8c1:abff:fe11:9c97, eth1, weight 1, 00:00:27
C * fe80::/64 is directly connected, eth1, 00:00:33
C>* fe80::/64 is directly connected, eth0, 00:00:33
frr1# show isis database detail
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
frr1.00-00 * 119 0x00000002 0xa29f 1133 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: frr1
TE Router ID: 172.20.20.24
Router Capability: 172.20.20.24 , D:0, S:0
IPv4 Interface Address: 172.20.20.24
IPv6 Reachability: fd00:100::1/128 (Metric: 10)
Subtlvs:
IPv6 Reachability: fd00:200::1/128 (Metric: 0)
Subtlvs:

1 LSPs

frr1#
root@frr1:#
root@frr1:# vtysh

Hello, this is FRRouting (version 10.0).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

frr1# conf t
frr1(config)# route-map bgp2isis6 permit 10
frr1(config-route-map)# exit
frr1(config)# exit
frr1# conf t
frr1(config)# router isis myisis
frr1(config-router)# redistribute ipv6 bgp level-1 route-map bgp2isis6
frr1(config-router)# end
frr1# wr
Note: this version of vtysh never writes vtysh.conf
Building Configuration...
Error renaming /etc/frr/frr.conf to /etc/frr/frr.conf.sav: Device or resource busy
Integrated configuration saved to /etc/frr/frr.conf
[OK]
frr1# show run
Building configuration...

Current configuration:
!
frr version 10.0
frr defaults traditional
hostname frr1
service integrated-vtysh-config
!
interface eth1
ipv6 nd ra-interval msec 500
exit
!
interface lo
ipv6 router isis myisis
isis passive
exit
!
router bgp 65535
bgp router-id 172.20.20.24
no bgp default ipv4-unicast
neighbor eth1 interface remote-as 65534
!
address-family ipv6 unicast
network fd00:100::1/128
redistribute isis
neighbor eth1 activate
neighbor eth1 route-map PASS_ALL in
neighbor eth1 route-map PASS_ALL out
exit-address-family
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0001.00
redistribute ipv6 bgp level-1 route-map bgp2isis6
exit
!
route-map PASS_ALL permit 10
exit
!
route-map bgp2isis6 permit 10
exit
!
end
frr1# show isis database detail
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
frr1.00-00 * 119 0x00000002 0xa29f 940 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: frr1
TE Router ID: 172.20.20.24
Router Capability: 172.20.20.24 , D:0, S:0
IPv4 Interface Address: 172.20.20.24
IPv6 Reachability: fd00:100::1/128 (Metric: 10)
Subtlvs:
IPv6 Reachability: fd00:200::1/128 (Metric: 0)
Subtlvs:

1 LSPs

frr1#
root@frr1:~# /etc/init.d/frr stop

• Stopped watchfrr
• Stopped bfdd
• Stopped isisd
• Stopped staticd
• Stopped bgpd
• Stopped mgmtd
• Stopped zebra
  root@frr1:# ps -elf | grep frr
  0 S root 3905 3496 0 80 0 - 1006 pipe_r 11:05 pts/1 00:00:00 grep --color=auto frr
  root@frr1:# /etc/init.d/frr start
• Starting watchfrr with command: ' /usr/lib/frr/watchfrr -d -F traditional zebra mgmtd bgpd isisd staticd bfdd'
• Started watchfrr
  root@frr1:~# vtysh

Hello, this is FRRouting (version 10.0).
Copyright 1996-2005 Kunihiro Ishiguro, et al.

frr1# show version
FRRouting 10.0 (frr1) on Linux(5.15.91).
Copyright 1996-2005 Kunihiro Ishiguro, et al.
configured with:
'--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=${prefix}/include' '--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--disable-option-checking' '--disable-silent-rules' '--libdir=${prefix}/lib/x86_64-linux-gnu' '--libexecdir=${prefix}/lib/x86_64-linux-gnu' '--disable-maintainer-mode' '--sbindir=/usr/lib/frr' '--with-vtysh-pager=/usr/bin/pager' '--libdir=/usr/lib/x86_64-linux-gnu/frr' '--with-moduledir=/usr/lib/x86_64-linux-gnu/frr/modules' '--disable-dependency-tracking' '--enable-rpki' '--disable-scripting' '--enable-pim6d' '--with-libpam' '--enable-doc' '--enable-doc-html' '--enable-snmp' '--enable-fpm' '--disable-protobuf' '--disable-zeromq' '--enable-ospfapi' '--enable-bgp-vnc' '--enable-multipath=256' '--enable-user=frr' '--enable-group=frr' '--enable-vty-group=frrvty' '--enable-configfile-mask=0640' '--enable-logfile-mask=0640' 'build_alias=x86_64-linux-gnu' 'PYTHON=python3'
frr1# show daemons
mgmtd zebra bgpd isisd watchfrr staticd bfdd
frr1# show runn
Building configuration...

Current configuration:
!
frr version 10.0
frr defaults traditional
hostname frr1
service integrated-vtysh-config
!
interface eth1
ipv6 nd ra-interval msec 500
exit
!
interface lo
ipv6 router isis myisis
isis passive
exit
!
router bgp 65535
bgp router-id 172.20.20.24
no bgp default ipv4-unicast
neighbor eth1 interface remote-as 65534
!
address-family ipv6 unicast
network fd00:100::1/128
redistribute isis
neighbor eth1 activate
neighbor eth1 route-map PASS_ALL in
neighbor eth1 route-map PASS_ALL out
exit-address-family
exit
!
router isis myisis
is-type level-1
net 49.0000.0000.0000.0000.0000.0000.0000.0000.0001.00
redistribute ipv6 bgp level-1 route-map bgp2isis6
exit
!
route-map PASS_ALL permit 10
exit
!
route-map bgp2isis6 permit 10
exit
!
end
frr1# show bgp ipv6 unicast summary
BGP router identifier 172.20.20.24, local AS number 65535 VRF default vrf-id 0
BGP table version 2
RIB entries 3, using 288 bytes of memory
Peers 1, using 20 KiB of memory

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt Desc
eth1 4 65534 9 8 2 0 0 00:00:22 1 2 N/A

Total number of neighbors 1
frr1# show bgp ipv6 unicast
BGP table version is 2, local router ID is 172.20.20.24, vrf id 0
Default local pref 100, local AS 65535
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

Network          Next Hop            Metric LocPrf Weight Path

*> fd00:100::1/128 :: 0 32768 i
*> fd00:200::1/128 eth1 0 0 65534 i

Displayed 2 routes and 2 total paths
frr1# show ipv6 route
Codes: K - kernel route, C - connected, L - local, S - static,
R - RIPng, O - OSPFv3, I - IS-IS, B - BGP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric, t - Table-Direct,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure

K>* ::/0 [0/1024] via 2001:172:20:20::1, eth0, 00:00:38
C>* 2001:172:20:20::/64 is directly connected, eth0, 00:00:38
L>* 2001:172:20:20::18/128 is directly connected, eth0, 00:00:38
L * fd00:100::1/128 is directly connected, lo, 00:00:38
C>* fd00:100::1/128 is directly connected, lo, 00:00:38
B>* fd00:200::1/128 [20/0] via fe80::a8c1:abff:fe11:9c97, eth1, weight 1, 00:00:33
C * fe80::/64 is directly connected, eth1, 00:00:38
C>* fe80::/64 is directly connected, eth0, 00:00:38
frr1# show isis database detail
Area myisis:
IS-IS Level-1 link-state database:
LSP ID PduLen SeqNumber Chksum Holdtime ATT/P/OL
frr1.00-00 * 96 0x00000001 0x7784 1142 0/0/0
Protocols Supported: IPv6
Area Address: 49.0000.0000.0000.0000.0000.0000
Hostname: frr1
TE Router ID: 172.20.20.24
Router Capability: 172.20.20.24 , D:0, S:0
IPv4 Interface Address: 172.20.20.24
IPv6 Reachability: fd00:100::1/128 (Metric: 10)
Subtlvs:

1 LSPs

frr1#
root@frr1:~#

[ton31337]

Does it happen for IPv4 also or only IPv6?

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[frrbot]

This issue will be automatically closed in the specified period unless there is further activity.