Forum Discussion
mlwebster
Cirrus
CirrusF5 appliances failing to establish OSPF with attached devices
Hi all, there is a little known 'feature' in the underlying Linux OS that has a hard limit of 20 network statements. If you go beyond 20, the additional networks will not be advertised in OSPF. I ...
zamroni777
MVP
MVPhave you used ospf area setting based on adjacency in order to enable auto summarization?
this cisco docs explains some examples.
it's not f5 but the mechanism should be applicable
https://www.ciscopress.com/articles/article.asp?p=2294214&seqNum=3
mlwebsterCirrus
CirrusHi,
the networks are all in the same area
pre super-netting (21 statements)
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/28 area n
networks 10.x.x.0/22 area n
networks 192.168.x.0/29 area n
here, the 192.168 subnet wasn’t advertised
post super-netting (12 statements)
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/24 area n
networks 10.x.x.0/20 area n
networks 10.x.x.0/21 area n
networks 10.x.x.0/28 area n
networks 10.x.x.0/22 area n
networks 192.168.x.0/29 area n
now working fine
If I was unable to super-net I’d need to use – I tested this before implementing the super-netting
net.ipv4.igmp_max_memberships=25 (>20)
