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IPv6 Loopback /64 route is not getting advertised to the neighbors #15709

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@SuvarnaMeenakshi

Description

@SuvarnaMeenakshi

Description

Steps to reproduce the issue:

  1. bring up a VS testbed with latest master branch image
    ./testbed-cli.sh -t vtestbed.yaml -m veos_vtb -k ceos add-topo vms-kvm-t0 password.txt

IPv6 loopback of SONiC VS is not reachable from ceos neighbors.

Describe the results you received:

IPv6 Loopback is not advertised to ceos neighbors.
Loopback0 configuration in config_db:
"Loopback0|FC0A:1::32/128": {}

vtysh output:

vlab-01# show bgp ipv6 fc0a:1::/64
BGP routing table entry for fc0a:1::/64, version 0
Paths: (1 available, no best path)
  Not advertised to any peer
  Local
    :: (inaccessible) from :: (10.1.0.32)
      Origin IGP, metric 0, weight 32768, invalid, sourced, local
      Last update: Mon Jul  3 23:00:48 2023

Error log in zebra.log

0:254:fc0a:1::/64: Failed to enqueue dataplane install

Static route configured for loopback /64 route is not installed correctly in frr, but is installed in kernel.

vtysh -c "show ipv6 route nexthop-group"

..q - queued..

 

C>* fc00::7c/126 (526) is directly connected, PortChannel104, 00:46:17
C>* fc02:1000::/64 (453) is directly connected, Vlan1000, 00:46:20
S>q fc0a:1::/64 [1/0] (648) is directly connected, Loopback0, weight 1, 00:05:19
C>* fc0a:1::32/128 (465) is directly connected, Loopback0, 00:46:20
ip -6 route show fc0a:1::/64
fc0a:1::/64 nhid 43 dev Loopback0 proto 196 metric 20 pref medium

Describe the results you expected:

Output of show version:

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Output of show techsupport:

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Additional information you deem important (e.g. issue happens only occasionally):

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