creating loopback interfaces

[axfalk]

We have a couple of Cat-6506's with MSFC's etherchannelled together on which we need to create loopback interfaces. Do these interfaces have to be on a separate subnets?

Thanks.

[paddyxdoyle]

Yes, i guess you will be using them for OSPF or similar?

You can give them 32 bit netmasks

e.g.

msfc1

int loopback0

ip address 10.32.1.1 255.255.255.255

msfc2

int loopback0

ip address 10.32.1.2 255.255.255.255

HTH

PD

[axfalk]

thanks for your response. I had a very similar config: - 10.6.36.2 and 10.6.36.3 and was able to ping one, but not the other. So, the fact that they're on the same subnet should not be a showstopper, right? If that's the case, I guess i got to start looking for a routing problem...

thanks again.

[Richard Burts]

Notice in the example that Paddy gave that both loopbacks have /32 masks (255.255.255.255). Verify that BOTH of your loopbacks have /32 masks. If one has a different mask then that is your problem.

HTH

Rick