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[arp_update]: Set failed IPv6 neighbors to incomplete #11919
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theasianpianist
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Sep 2, 2022
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[arp_update]: Set failed IPv6 neighbors to incomplete #11919
theasianpianist
merged 2 commits into
sonic-net:master
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theasianpianist:ipv6-incomplete-neigh
Sep 2, 2022
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Signed-off-by: Lawrence Lee <[email protected]>
prsunny
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Sep 1, 2022
Signed-off-by: Lawrence Lee <[email protected]>
prsunny
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Sep 1, 2022
Can you please raise one for 202012? |
Addressed offline, we should be able to cherry-pick to 202012 without any conflicts |
/AzurePipelines run Azure.sonic-buildimage |
Azure Pipelines successfully started running 1 pipeline(s). |
qiluo-msft
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After pinging any failed IPv6 neighbor entries, set the remaining failed/incomplete entries to a permanent INCOMPLETE state. This manual setting to INCOMPLETE prevents these entries from automatically transitioning to FAILED state, and since they are now incomplete any subsequent NA messages for these neighbors is able to resolve the entry in the cache. Signed-off-by: Lawrence Lee <[email protected]>
yxieca
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Sep 8, 2022
After pinging any failed IPv6 neighbor entries, set the remaining failed/incomplete entries to a permanent INCOMPLETE state. This manual setting to INCOMPLETE prevents these entries from automatically transitioning to FAILED state, and since they are now incomplete any subsequent NA messages for these neighbors is able to resolve the entry in the cache. Signed-off-by: Lawrence Lee <[email protected]>
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theasianpianist
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Typo in prior PR #11919 hardcodes Vlan name. Change command to use the $vlan variable instead Signed-off-by: Lawrence Lee <[email protected]>
yxieca
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Typo in prior PR #11919 hardcodes Vlan name. Change command to use the $vlan variable instead Signed-off-by: Lawrence Lee <[email protected]>
qiluo-msft
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Typo in prior PR #11919 hardcodes Vlan name. Change command to use the $vlan variable instead Signed-off-by: Lawrence Lee <[email protected]>
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Signed-off-by: Lawrence Lee [email protected]
Why I did it
If IPv6 neighbor entries become "FAILED", then any subsequent neighbor advertisement messages will not be able to resolve these entries in the neighbor cache, only a ping or other traffic being sent from the device will be able to resolve these. This means that standby ToRs may have such FAILED entries stuck in the neighbor cache for a long time.
How I did it
After pinging any failed IPv6 neighbor entries, set the remaining failed/incomplete entries to a permanent INCOMPLETE state. This manual setting to INCOMPLETE prevents these entries from automatically transitioning to FAILED state, and since they are now incomplete any subsequent NA messages for these neighbors is able to resolve the entry in the cache.
How to verify it
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Description for the changelog
Link to config_db schema for YANG module changes
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