It's not about saving a /32. This is a CPE device and I was just trying to save myself administrative burden of maintaining another per-customer static ip assignment. I don't need dynamic routing protocol to run on those interfaces, but thanks for pointing it out anyway. Ok, if I have to do it then I have to do it. Thanks everybody,
Michael On Monday 03 August 2009 11:42:09 am Rodney Dunn wrote: > Don't do it. It's a hack and there are other forwarding plane things > that don't like it. Read as..it may or may not always work. > > Burn another /32 for your loopback. > > Rodney > > > > Aaron wrote: > > Loopback interfaces do not go down, so I'm not sure what benefit you are > > getting besides the ability to blackhole the 10.10.10.0/24 if the ethernet > > goes down. > > > > On Mon, Aug 3, 2009 at 11:09, Michael Ulitskiy <[email protected]> wrote: > > > >> Hello, > >> > >> Guys, are there any drawbacks of doing the following: > >> > >> interface Lo0 > >> ip address 10.10.10.1 255.255.255.0 > >> ! > >> interface FastEthernet0/0.1 > >> encapsulation dot1q 1 native > >> ip unnumbered Lo0 > >> ! > >> ip route 10.10.10.0 255.255.255.0 FastEthernet0/0.1 > >> ! > >> > >> as opposed to having ip address configured directly on the interface as > >> usual? > >> I need that ip address to stay always up regardless of Fa0/0 state, 'cause > >> it's used for other services that should stay up > >> and I'd prefer to avoid assigning another ip address exclusively for > >> loopback use. > >> It seems to work in my lab, but I thought I'd better ask... > >> > >> Thanks, > >> Michael > >> _______________________________________________ > >> cisco-nsp mailing list [email protected] > >> https://puck.nether.net/mailman/listinfo/cisco-nsp > >> archive at http://puck.nether.net/pipermail/cisco-nsp/ > >> > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
