Bug ID 2016349: IPv6 NDP Neighbor Advertisements may get dropped at the VELOS platform layer when tenant transitions from Standby to Active during a failover

Last Modified: Sep 16, 2025

Affected Product(s):
F5OS Velos(all modules)

Known Affected Versions:
F5OS-C 1.8.1

Opened: Aug 11, 2025

Severity: 4-Minor

Symptoms

-- Some IPv6 NDP Neighbor Advertisements (NA) from a tenant does not egress the VELOS platform when the tenant becomes active during failover. -- When a failover occurs, drop_pkt_cnt increases when observing the counters from the controller using the following command: for i in blade-{1,2}; do echo $i; echo '====='; ssh $i docker exec -i partition_fpga fpgatool -c \"nsms hdp_drop_pkt_cnt 1\"; done

Impact

Upstream devices do not receive the IPv6 NDP NAs that should have indicated that the new tenant has taken over for the affected IPv6 addresses.

Conditions

-- Tenant running on VELOS v1.8.1, v1.8.2. -- IPv6 floating self-IPs and many IPv6 floating virtual addresses are configured in VLANs on the tenant. -- Failover occurs.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips