IPv6 flaps on OVS restart due to ndisc_notify settings on RHEL/CentOS
Bug #1827927 reported by
Dan Sneddon
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
tripleo |
Fix Released
|
High
|
Dan Sneddon |
Bug Description
On RHEL/CentOS, the IPv6 stack is configured by default to not send Neighbor Discovery Notifications. This has the result that when OVS restarts or an internal port flaps, neighbors are not made aware of the new MAC address.
By enabling the sysctl parameter net.ipv6.
In order to enable this behavior by default in TripleO, we should add the following default sysctl parameter in deployment/
net.ipv6.
value: 1
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This change should be backported, as it fixes a bug and carries no risk.