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[action] [PR:26349] [sonic-bgpcfgd] Add ability to wait on rehydration for additional Loopback IPs during reloads#2147

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[action] [PR:26349] [sonic-bgpcfgd] Add ability to wait on rehydration for additional Loopback IPs during reloads#2147
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mssonicbld:cherry/msft-202506/26349

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Why I did it

If there are additional Loopback IPs defined in config db that are being advertised out via frr template files(using bgp network statements) and their config has not replayed in sonic-bgpcfgd, then these loopback ips transiently fail to be advertised out by the templates.

Work item tracking
  • Microsoft ADO (number only):

How I did it

We introduce the ability to check for and fail peer addition requests if a additional loopbacks, as specified via a per-peer J2 file(additional_loopbacks.j2), are not replayed to bgpcfgd yet.

How to verify it

bgpcfgd unit test, and real device test in lab

Which release branch to backport (provide reason below if selected)

  • 202305
  • 202311
  • 202405
  • 202411
  • 202505
  • 202511

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

Signed-off-by: Sonic Build Admin sonicbld@microsoft.com

A picture of a cute animal (not mandatory but encouraged)

…pback IPs during reloads

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#### Why I did it
If there are additional Loopback IPs defined in config db that are being advertised out via frr template files(using bgp network statements) and their config has not replayed in sonic-bgpcfgd, then these loopback ips transiently fail to be advertised out by the templates.

##### Work item tracking
- Microsoft ADO **(number only)**:

#### How I did it
We introduce the ability to check for and fail peer addition requests if a additional loopbacks, as specified via a per-peer J2 file(additional_loopbacks.j2), are not replayed to bgpcfgd yet.

#### How to verify it
bgpcfgd unit test, and real device test in lab

<!--
If PR needs to be backported, then the PR must be tested against the base branch and the earliest backport release branch and provide tested image version on these two branches. For example, if the PR is requested for master, 202211 and 202012, then the requester needs to provide test results on master and 202012.
-->

#### Which release branch to backport (provide reason below if selected)

<!--
- Note we only backport fixes to a release branch, *not* features!
- Please also provide a reason for the backporting below.
- e.g.
- [x] 202006
-->

- [ ] 202305
- [ ] 202311
- [ ] 202405
- [ ] 202411
- [ ] 202505
- [x] 202511

#### Tested branch (Please provide the tested image version)

<!--
- Please provide tested image version
- e.g.
- [x] 20201231.100
-->

- [ ] <!-- image version 1 -->
- [ ] <!-- image version 2 -->

#### Description for the changelog
<!--
Write a short (one line) summary that describes the changes in this
pull request for inclusion in the changelog:
-->

<!--
 Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.
-->

#### Link to config_db schema for YANG module changes
<!--
Provide a link to config_db schema for the table for which YANG model
is defined
Link should point to correct section on https://github.com/Azure/sonic-buildimage/blob/master/src/sonic-yang-models/doc/Configuration.md
-->

Signed-off-by: Sonic Build Admin <sonicbld@microsoft.com>

#### A picture of a cute animal (not mandatory but encouraged)
@mssonicbld
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Original PR: sonic-net/sonic-buildimage#26349

@mssonicbld mssonicbld requested a review from lguohan as a code owner April 7, 2026 01:02
@mssonicbld
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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

@mssonicbld
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This cherry pick PR has been opened for more than 3 days. The mssonicbld will attempt to retry.

---Powered by SONiC BuildBot

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/azpw retry

@yijingyan2
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/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

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