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update next_hop_group_id. Add ingress TTL rewrite.
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@dplore
dplore committed Aug 15, 2024
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77 changes: 14 additions & 63 deletions feature/gribi/otg_tests/mpls_in_udp/README.md
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# TE-18.1 MPLS in UDP Encapsulation with QoS scheduler
# TE-18.1 gRIBI MPLS in UDP Encapsulation with OC QoS scheduler

Create AFT entries using gRIBI to match destination IP address in a
network-instance. Encapsulate the matching packets in MPLS in UDP. Configure
a qos scheduler to rate limit / police traffic based on matching the
destination IP address of a packet input to the DUT.
a qos scheduler using gNMI to rate limit / police traffic based on matching
the destination IP address of a packet input to the DUT.

The MPLS in UDP encapsulation is expected to follow [rfc7510](https://datatracker.ietf.org/doc/html/rfc7510#section-3),
The MPLS in UDP encapsulation is expected to follow
[rfc7510](https://datatracker.ietf.org/doc/html/rfc7510#section-3),
but relaxing the requirement for a well-known destination UDP port. gRIBI is
expected to be able to set the destination UDP port.

Expand Down Expand Up @@ -67,7 +68,7 @@ network_instances: {
}
next_hop_groups {
next_hop_group {
next_hop_group_name: "nhg_A" # OC model says it's system assigned for telemetry, we want to let gRIBI assign this.
next_hop_group_id: "nhg_A" # New OC path /network-instances/network-instance/afts/next-hop-groups/next-hop-group/state/next-hop-group-id
id: 100
next_hops { # reference to a next-hop
next_hop: {
Expand Down Expand Up @@ -107,7 +108,7 @@ network_instances: {
}
next_hop_groups {
next_hop_group {
next_hop_group_name: "nhg_A" # OC model says it's system assigned for telemetry, we want to let gRIBI assign this.
next_hop_group_id: "nhg_A" # new OC path /network-instances/network-instance/afts/next-hop-groups/next-hop-group/state/next-hop-group-id
id: 200
next_hops { # reference to a next-hop
next_hop: {
Expand Down Expand Up @@ -243,7 +244,7 @@ openconfig-qos:
conditions:
next-hop-group:
config:
name: "nhg_A" # new OC path needed, string related to /afts/next-hop-groups/next-hop-group/state/next-hop-group-name
name: "nhg_A" # new OC path needed, string related to /afts/next-hop-groups/next-hop-group/state/next-hop-group-id
- classifer: “dest_B”
config:
name: “dest_B”
Expand All @@ -254,7 +255,7 @@ openconfig-qos:
conditions:
next-hop-group:
config:
name: "nhg_B" # new OC path needed, string related to /afts/next-hop-groups/next-hop-group/state/next-hop-group-name
name: "nhg_B" # new OC path needed, string related to /afts/next-hop-groups/next-hop-group/state/next-hop-group-id

input-policies: # new OC subtree input-policies (/qos/input-policies)
- input-policy: "limit_group_A_2Gb"
Expand Down Expand Up @@ -327,7 +328,7 @@ network_instances {
}
next_hop_groups {
next_hop_group {
next_hop_group_name: "Decap" # OC model says it's system assigned for telemetry, should we let gRIBI assign this?
next_hop_group_id: "Decap" # New OC path /network-instances/network-instance/afts/next-hop-groups/next-hop-group/state/next-hop-group-id
id: 999
next_hops {
next_hop: {
Expand All @@ -350,61 +351,10 @@ network_instances {
}
```

### TE-18.1.5 Scale
### TE-18.1.5 Rewrite inner packet TTL=2 if inner TTL=1

TODO: Move to separate README

#### Scale targets

* Flow scale
* 20,000 IPv4/IPv6 destinations
* 1,000 vlans
* Inner IP address space should be reused for each network-instance.
* gRIBI client update rate `flow_r` = 1 update per second
* Each gRIBI update include ip entries in batches of `flow_q` = 200
* DUT packet forwarding updated within 1 second after adding entries

* Scheduler (policer) scale
* 1,000 policer rates
* 20,000 token buckets / scheduler instantiations
* Update schedulers at 1 per `sched_r` = 60 seconds
* Update schdulers in a batch of `sched_q` = 1,000
* Scheduler changes should take effect within `sched_r` / 2 time

#### Scale profile A - many vlans

* 20 ip destinations * 1,000 vlans = 20,000 'flows'
* Each ingress vlan has 10 policers = 10,000 'token buckets'
* The 20 ip destinations are split evenly between the 10 policers
* Each policer is assigned rate limits matching one of 800 different possible limits between 1Gbps to 400Gbps in 0.5Gbps increments

#### Scale profile B - many destinations, few vlans

* 200 ip destinations * 100 vlans = 20,000 'flows'
* Each ingress vlan has 4 policers = 4,000 'token buckets'
* The 200 ip destinations are split evenly between the 4 policers
* Each policer is assigned rate limits matching one of 800 different possible limits between 1Gbps to 400Gbps in 0.5Gbps increments

#### Procedure - Flow Scale

* For each scale profile, create the following subsets TE-18.1.5.n
* Configure ATE flows to send 100 pps per flow and wait for ARP
* Send traffic for q flows (destination IP prefixes) for 2 seconds
* At traffic start time, gRIBI client to send `flow_q` aft entries and their
related NHG and NH at rate `flow_r`
* Validate RIB_AND_FIB_ACK with FIB_PROGRAMMED is received from DUT within
1 second
* Measure packet loss. Target packet loss <= 50%.
* Repeat adding 200 flows until 20,000 flows have been added
* Once reaching 20,000 flows, perform 1 iteration of modifying the first
`flow_q` flows to use different NH,NHG

#### Procedure - Policer + Flow Scale

* For each scale profile, create the following subsets TE-18.1.6.n
* Program all 20,000 flows
* Every `sched_r` interval use gnmi.Set to replace `sched_q` scheduler policies
* Verify packet loss changes for all flows within `sched_r` / 2 time
* The DUT must re-write the ingress, innner packet TLL = 2, if the
incoming TTL = 1.

#### OpenConfig Path and RPC Coverage

Expand Down Expand Up @@ -448,6 +398,7 @@ paths:
#/network-instances/network-instance/afts/next-hops/next-hop/mpls-in-udp/state/ip-ttl:
#/network-instances/network-instance/afts/next-hops/next-hop/mpls-in-udp/state/dst-udp-port:
#/network-instances/network-instance/afts/next-hops/next-hop/mpls-in-udp/state/dscp:
#/network-instances/network-instance/afts/next-hop-groups/next-hop-group/state/next-hop-group-id:

rpcs:
gnmi:
Expand Down

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