OSPF adjacencies on HSRP routers

[switched switch]

All,

I have two routers, both routers running HSRP on around 9 subinterfaces with one router as primary and the other standby.

I have a OSPF adjacencies with the loopback (router-id) on each router, with that of the 9 subinterfaces on the other HSRP router.

Do I need this many adjacencies to be active, I am thinking if OSPF is flapping for any reason it will cause router performance issues.

Should each router only form one adjacencies with teh other HSRP router?

[acampbell]

Hi,

You really only need the OSPF neighborship accross the subinterfaces that you regard as your layer3 IP routing
interfaces/Vlans.

Lets say you use vlans 21 & 22 for IP routing and these are sub interfaces on fas0/0 off each router
and may be they have a serial routed interface Serial0/0/0

router ospf 1
area 0 authentication message-digest
passive-interface default
no passive-interface FastEthernet0/0.21
no passive-interface FastEthernet0/0.22
no passive-interface Serial0/0/0
... MORE OSPF CONFIG ....
!
!
!
interface FastEthernet0/0.21
ip ospf message-digest-key 1 md5 MY-OSPF-PASSWORD
.... MORE CONFIG ....
!
interface FastEthernet0/0.22
ip ospf message-digest-key 1 md5 MY-OSPF-PASSWORD
.... MORE CONFIG ....
!
interface Serial0/0/0
ip ospf message-digest-key 1 md5 MY-OSPF-PASSWORD
.... MORE CONFIG ....
!

You will now only allow OSPF neiborships to form on your selected interfaces/sub-interfaces

Hope this helps
Regards
Alex