Last Modified: Jun 19, 2025
Affected Product(s):
F5OS F5OS-C
Fixed In:
F5OS-C 1.8.0
Opened: May 13, 2021 Severity: 2-Critical
During a system controller failover, tenant management IP's may be unreachable for several minutes. Once the ARP entry for the tenants IP times out in the upstream router, it will be re-populated with the correct MAC after the failover and begin working again.
The tenant management IP may be unreachable for several minutes after a system controller failover. Once the upstream ARP entry has timed out, the tenant management IP will be reachable again.
This occurs during a system controller failover due to the ARP entries not being updated for the tenants.
There is no workaround, and once the upstream ARP entry has timed out, the tenant management IP will be reachable again.
The tenant orchestration layer will now cause Gratuitous ARPs to be sent for the tenant management IPs when a system controller failover happens. The restores tenant management IP connectivity quickly after a system controller failover.