[c-nsp] Loopback Advertise in OSPF

Phil Mayers p.mayers at imperial.ac.uk
Tue Feb 26 18:03:25 EST 2008


Darryl Dunkin wrote:
> If you're using /32 masks for your loopbacks (as you should):
> router ospf ####
>   redistribute connected subnets 
> 
> The key part is to define 'subnets'.

My personal preference has been to allocate router loopbacks *and* p2p 
IPs out of a cidr block and use a network statement (which can be 
identical on all routers):

int lo1
  ip address 192.168.0.1 255.255.255.255
int vl4000
  ip ospf network point-to-point
  ip address 192.168.1.1 255.255.255.252

router ospf 1
  network 192.168.0.0 0.0.1.255 area 0




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