Why instances are not reachable for few mins after live-migration?

Issue

Before live-migration instance was pingable.
Traffic lost during the migration.
Once the instance is spawned successfully on destination compute node still it not reachable for 5 mins. Which is equal to 300s default timeout for linux bridge entry.
Traffic was reaching upto the qvb interface of linux bridge but was not reaching to tap interface.
Security rules doesn't seem to be an issue here.
Captured linux bridge mac entries at the time of issue from destination compute node indicates that wrong port and MAC address mapping could be the cause of issue.
Newly populated after timeout of old entry entry pick the right port corresponding to MAC address.
After that instance was reachable.

Note: Issue was not reproducible at desire, it's an intermittent issue.

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