The rdmaip driver does not send IPv6 address change notification to RDS, which can delay or prevent IPv6 fail over when using RoCE. This is apparent when active bonding is enabled and only occurs for IPv6. The IPv4 failover continues to work correctly.

When the issue is triggered, the following messages may appear in the kernel log:

kernel: rdmaip: could not add 2001:db8:0:f101::50%4/64 to ens2f0 (port 1)
kernel: IPv6: ens2f0: IPv6 duplicate address 2001:db8:0:f101::50 used by 
        50:6b:4b:cb:ef:23 detected!

A fix is in development but is not available at the time of this release. The fix may become available as an errata update.

(Bug ID 31021418)