[doc] Update announce_routes doc for isolated T1#19128
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Blueve merged 1 commit intosonic-net:masterfrom Jun 23, 2025
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 #19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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<!-- Please make sure you've read and understood our contributing guidelines; https://github.com/sonic-net/SONiC/blob/gh-pages/CONTRIBUTING.md Please provide following information to help code review process a bit easier: --> ### Description of PR <!-- - Please include a summary of the change and which issue is fixed. - Please also include relevant motivation and context. Where should reviewer start? background context? - List any dependencies that are required for this change. --> Summary: Fixes # (issue) ### Type of change <!-- - Fill x for your type of change. - e.g. - [x] Bug fix --> - [ ] Bug fix - [ ] Testbed and Framework(new/improvement) - [ ] New Test case - [ ] Skipped for non-supported platforms - [ ] Test case improvement ### Back port request - [ ] 202205 - [ ] 202305 - [ ] 202311 - [ ] 202405 - [ ] 202411 - [ ] 202505 ### Approach #### What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos #### How did you do it? 1. For announce_routes.py, update to announce correct routes - Announce more routes, details: sonic-net/sonic-mgmt#19128 - Add support to announce different sets from downstream 3. For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. #### How did you verify/test it? Run tests #### Any platform specific information? #### Supported testbed topology if it's a new test case? ### Documentation <!-- (If it's a new feature, new test case) Did you update documentation/Wiki relevant to your implementation? Link to the wiki page? -->
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…opo (#437) <!-- Please make sure you've read and understood our contributing guidelines; https://github.com/sonic-net/SONiC/blob/gh-pages/CONTRIBUTING.md Please provide following information to help code review process a bit easier: --> ### Description of PR <!-- - Please include a summary of the change and which issue is fixed. - Please also include relevant motivation and context. Where should reviewer start? background context? - List any dependencies that are required for this change. --> Summary: Fixes # (issue) ### Type of change <!-- - Fill x for your type of change. - e.g. - [x] Bug fix --> - [ ] Bug fix - [ ] Testbed and Framework(new/improvement) - [ ] New Test case - [ ] Skipped for non-supported platforms - [ ] Test case improvement ### Back port request - [ ] 202205 - [ ] 202305 - [ ] 202311 - [ ] 202405 - [ ] 202411 - [ ] 202505 ### Approach #### What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos #### How did you do it? 1. For announce_routes.py, update to announce correct routes - Announce more routes, details: sonic-net/sonic-mgmt#19128 - Add support to announce different sets from downstream 3. For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. #### How did you verify/test it? Run tests #### Any platform specific information? #### Supported testbed topology if it's a new test case? ### Documentation <!-- (If it's a new feature, new test case) Did you update documentation/Wiki relevant to your implementation? Link to the wiki page? -->
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 #19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: opcoder0 <110003254+opcoder0@users.noreply.github.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: opcoder0 <110003254+opcoder0@users.noreply.github.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: Aharon Malkin <amalkin@nvidia.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: Aharon Malkin <amalkin@nvidia.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1
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Jan 13, 2026
What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: Guy Shemesh <gshemesh@nvidia.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1 Signed-off-by: Yael Tzur <ytzur@nvidia.com>
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests Signed-off-by: Yael Tzur <ytzur@nvidia.com>
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What is the motivation for this PR? Add docs for announce routes for isolated T1 How did you do it? Add docs for announce routes for isolated T1
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What is the motivation for this PR? Fix incorrect route announcing in isolated T1 topos How did you do it? For announce_routes.py, update to announce correct routes Announce more routes, details: [doc] Update announce_routes doc for isolated T1 sonic-net#19128 Add support to announce different sets from downstream For test_ipv6_bgp_scale, because T0 and T2 would both announce default routes, but T0s' has the shorter as path. Hence by default there are only default routes from T0s taking effect. In test, after shutdown all T0 neighbor ports, default routes wouldn't disappear, but default routes from T2 would appear. Hence update routes verification here. How did you verify/test it? Run tests
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Description of PR
Summary:
Fixes # (issue)
Type of change
Back port request
Approach
What is the motivation for this PR?
Add docs for announce routes for isolated T1
How did you do it?
Add docs for announce routes for isolated T1
How did you verify/test it?
Any platform specific information?
Supported testbed topology if it's a new test case?
Documentation