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[action] [PR:18719] chore: update announce routes script to match T2 #18784

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Merged
mssonicbld merged 1 commit into from
Jun 4, 2025
Merged

[action] [PR:18719] chore: update announce routes script to match T2 #18784

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11 changes: 11 additions & 0 deletions ansible/library/announce_routes.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
#!/usr/bin/env python

import itertools
import math
import os
import yaml
Expand Down Expand Up @@ -1324,6 +1325,14 @@ def fib_lt2_routes(topo, ptf_ip, action="annouce"):
group_nums = len(t1_vms) // T1_GROUP_SIZE
t1_route_per_group = math.ceil(ROUTE_NUMBER_T1 / T1_GROUP_SIZE / group_nums)

# 32 route each x 4 to match 110 T1
extra_ipv4_t1 = itertools.chain(
ipaddress.ip_network("192.168.0.0/27"),
ipaddress.ip_network("192.169.0.0/27"),
ipaddress.ip_network("192.170.0.0/27"),
ipaddress.ip_network("192.171.0.0/27"),
)

for group in range(group_nums):
selected_v4_subnets = all_subnetv4[group * t1_route_per_group: group * t1_route_per_group + t1_route_per_group]
selected_v6_subnets = all_subnetv6[group * t1_route_per_group: group * t1_route_per_group + t1_route_per_group]
Expand All @@ -1341,6 +1350,8 @@ def fib_lt2_routes(topo, ptf_ip, action="annouce"):
ipv4_routes.append((str(subnetv4), nhipv4, as_path))
ipv6_routes.append((str(subnetv6), nhipv6, as_path))

ipv4_routes.append((str(next(extra_ipv4_t1)), nhipv4, as_path))

change_routes(action, ptf_ip, IPV4_BASE_PORT + vm_offset, ipv4_routes)
change_routes(action, ptf_ip, IPV6_BASE_PORT + vm_offset, ipv6_routes)

Expand Down
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