What in the world is the question about, what are you trying to do. Ping the remote routers, they have a serial interface that you can ping, or the ethernet. Why do you need a loopback, what routing protocol are you running, where is a config? We can't figure out what you are talking about, we need your help to help you.
Brian Lodwick wrote: >This has got to be the most confusing message I have ever read. >A loopback interface is just a virtual interface. It's not a real interface >it's just a virtual interface you can create within the router, and you can >create as many as you want. >The biggest reason someone would want to use a loopback interface would be >for resiliency. If you build a certain session to the loopback interface >(BGP, DLSW...) and you have more than one path to reach this router the >session will not die if a certain interface dies. > ___________ ( ) >------- r1 >>Brian > > >""Mark Odette II"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > >>Just when I thought I understood Loopback interfaces, I decided while >>redesigning a network, that I would use them.... but now I'm questioning >> >my > >>comprehension. >> >>Somebody clear the confusion for me- Please. >> >> >>This is what I'm wanting to do, but not sure if this is proper >> >utilization, > >>much less whether or not it will work: >> >> >> >>RouterHQ connecting to 3 Remote Routers (branch offices) via FR Pvt >> >Network > >>RouterHQ has 2 Ethernet Interfaces, but the Remotes Do NOT....They only >> >have > >>one. >>(I think without pause: "No Problem, I can just create a Loopback >> >interface > >>to take care of the other subnet.") >> >>The FR Pvt Network is only for Voice Traffic, while all data traffice will >>be going out another interface that is using IP UnNumbered Interface >>FastEthernet0. >> >>Here is where my quandry lays. I can't create a Secondary address, as I >>believe the IP UnNumbered command will use the primary address on the >>Ethernet Interface. >> >>So, can I create a Loopback interface, and treate it like a Ethernet >>interface, as such that I can assign an IP to the Loopback interface, but >> >it > >>have a /24 mask, and other devices on the local network can also be keyed >>for the same subnet as the Loopback, making it where I can give the >> >command > >>IP UnNumbered Lo0 to a Serial SubInterface?? >> >>I thought I could, but then got concerned when I hopped on CCO, and did a >>lookup on Loopback interfaces, and read a blurb about traffic NOT destined >>for the LoopBack Interface itself will be routed to 'ye old trashcan' >> >i.e., > >>Null Interface. >> >>Somebody please tell me that I can send traffic from one end of the >> >circuit > >>to the other and have it destined for a node OTHER than the Loopback >>Interface with that node being on the same subnet as the Loopback >> >interface. > >>Thanks. >> >>Mark Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38069&t=37933 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
