OSPF host route advertisement

[inoc_noc]

Lets say a device has a single loopback interface with several /32 IP addresses configured on it. Taking subinterfaces out of the equation, is there any way to advertise a "router LSA" that will list the various /32 network "links" with different costs?

[Thotsaphon Lueangwattanaphong]

Hi,

Is this a trick question? (J/K)

let's test it by using use point-to-multipoint ospf network. You will see a host route advertised by a neighbor.

Toshi

[Giuseppe Larosa]

Hello Inoc,

>> Lets say a device has a single loopback interface with several /32 IP addresses configured on it.

Taking subinterfaces out of the equation, is there any way to advertise a "router LSA" that will list the various /32 network "links" with different costs?

no, ip ospf cost is per link, only with an OSPF network point to multipoint you could provide a per neighbor cost.

but you think of a loopback it is isolated from outside world by definition.

I suppose you have a primary address and several secondary addresses.

you could use a redistribute connected with a route map that set different seed metrics for different addresses.

but this would mean injecting external routes in OSPF that can be acceptable or not.

Hope to help

Giuseppe