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Krishna_251070
Nimbostratus
NimbostratusOSPF stuck in Exstart
Hello,
I am facing an issue with enabling OSPF between a Cisco Router and F5 LTM. The OSPF adjacency process is getting stuck at exstart phase.
This is how my toplogy looks like:
Cisco Router<-...
Krishna_251070Nimbostratus
NimbostratusThis issue was caused by ACL blocking unicast traffic between OSPF peers. The multicast address 224.0.0.5 was permitted in the ACL. That is reason why the adjacency state moved till EXSTART.
DBD packet exchange happens using the unicast addresses.