Forum Discussion
NimbostratusAdvertised route via OSPFv2
We use the advanced routing module (a module I'm not familiar with) in the F5 to advertise routes via OSPFv2 to to a network that uses the F5 as the default gateway. There are two Forwarding (IP) virtual servers one handling traffic into this network listening for a destination of 192.168.86.0/24 on any port and one for outbound traffic listening for a destination of any on any port.
For some reason my standby F5 is also advertising itself as the default route. I have worked with my Cisco guys to verify there are no static routes (their first assumption) and OSPFv2 is the only routing protocol enabled. I thought when we configured the routing module that both units were configured the same, but apparently not. Any help in running this down would be greatly appreciated since I inherited this I'm not really sure where to look next.
This is from our core data center switch:
Type-5 AS External Link States
Link ID ADV Router Age Seq Checksum Tag
0.0.0.0 Standby F5 IP 1246 0x800009d9 0x2b20 0
17 Replies
NikhilBEmployee
Under Route Advertisement, can you uncheck this feature to verify the outcome? If your active box goes down you would expect the standby unit to advertise the route to the up stream routers.
Judging from what your saying, you are seeing routes advertised by the standby unit with a better metric?
Russell_77729I see the 192.168.86.0 route advertised from both, but I see the 0.0.0.0 route advertised only from the standby. Neither unit should be advertising 0.0.0.0 but both should be advertising 192.168.86.0.- NikhilBOK. So am assuming you have route advertisement turned off for 0.0.0.0 route on both devices?
- Russell_77729Correct. ltm virtual-address 0.0.0.0 { address any app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask any metadata none partition Common route-advertisement disabled server-scope any traffic-group traffic-group-1 unit 1 }
Under Route Advertisement, can you uncheck this feature to verify the outcome? If your active box goes down you would expect the standby unit to advertise the route to the up stream routers.
Judging from what your saying, you are seeing routes advertised by the standby unit with a better metric?
- Russell_77729I see the 192.168.86.0 route advertised from both, but I see the 0.0.0.0 route advertised only from the standby. Neither unit should be advertising 0.0.0.0 but both should be advertising 192.168.86.0.
- OK. So am assuming you have route advertisement turned off for 0.0.0.0 route on both devices?
- Russell_77729Correct. ltm virtual-address 0.0.0.0 { address any app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask any metadata none partition Common route-advertisement disabled server-scope any traffic-group traffic-group-1 unit 1 }
- shaggy_121467
Cumulonimbus
can you provide the output from the tmsh command
?list ltm virtual-address 192.168.86.0 all-propertiesI want to see what traffic-group the network virtual-address is associated with.
- Russell_77729ltm virtual-address 192.168.86.0 { address 192.168.86.0 app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask 255.255.255.0 metadata none partition Common route-advertisement enabled server-scope none traffic-group traffic-group-1 unit 1 }
- shaggy_121467can you post the same config from the standby unit?
- Russell_77729That was the standby unit, here is the active unit. ltm virtual-address 192.168.86.0 { address 192.168.86.0 app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask 255.255.255.0 metadata none partition Common route-advertisement enabled server-scope none traffic-group traffic-group-1 unit 1 }
shaggycan you provide the output from the tmsh command
?list ltm virtual-address 192.168.86.0 all-propertiesI want to see what traffic-group the network virtual-address is associated with.
- Russell_77729ltm virtual-address 192.168.86.0 { address 192.168.86.0 app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask 255.255.255.0 metadata none partition Common route-advertisement enabled server-scope none traffic-group traffic-group-1 unit 1 }
- shaggycan you post the same config from the standby unit?
- Russell_77729That was the standby unit, here is the active unit. ltm virtual-address 192.168.86.0 { address 192.168.86.0 app-service none arp disabled auto-delete true connection-limit 0 description none enabled yes floating enabled icmp-echo disabled inherited-traffic-group false mask 255.255.255.0 metadata none partition Common route-advertisement enabled server-scope none traffic-group traffic-group-1 unit 1 }
- Russell_77729
I have opened a support ticket with F5 to resolve this.
