Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP All
Known Affected Versions:
12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7
Fixed In:
14.1.0, 13.1.1.4, 12.1.4
Opened: Feb 09, 2018 Severity: 3-Major
ZebOS may repeatedly add and delete the routes from protocol daemons. This may cause the protocol daemons to delete and re-advertise the default route.
Route flapping may cause instability in the network, including inability to reach the default network advertised by the BIG-IP.
- Dynamic routing in use - Kernel routes redistributed into a routing protocol - Static route configure in TMOS - Route advertisement enabled on the virtual-address that's the same as the static route
Since the static route will be redistributed in the same way as the virtual-address, there is no need to enable route-advertisement on the VIP virtual-address. Disabling this will resolve the problem. The problem will also be resolved by moving the route from tmsh into ZebOS. - In imish config mode, "ip route <route> <gateway>" - In tmsh, "delete net route <route>"
Configuring a static route in TMOS and enabling route-advertisement on the same virtual-address no longer causes route flapping in ZebOS.