OSPF HELPS

tommylucky

IN ROUTER THEY HAVE OSPF , TO EXTEND OSPF , I TYPE
router(config)#:interface loopback 0
router(config-inf)#:ip address x.x.x.x x.x.x.x
BUT I DONT KNOW THE ADDRESS IN THIS COMMAND , MAY BE I TYPE HIGHEST ADDRESS IS x.x.x.1 BTU WHEN I TYPE THE SERIAL PORT OR ETHERNET THE SAME WITH OVERLAPS SO I DONT KNOW WHAT TO DO

I NEED THE HELPS FROM EVERYBODY

keenon

provide me 2 show commands

the first is: sh run | begin router

the second is: sh ip int brief

reason i ask for these is i can guess that the loopback address is using a real local network ip address and your trying to use that same address on the ethernet interface.. if you must use that address u can put an unnumbered address on the ethernet interface borrowing the address from the loopback

example:
RouterA(config)# int e0
RouterA(config-if)# ip unnumbered loopback 0

also if doing that assign the loopback with a 255.255.255.255 subnet mask

reference:
http://www.cisco.com/warp/public/701/20.html

EdTheLad

Why did you choose the name tommylucky and not TOMMYLUCKY ?

Humper

ed_the_lad wrote:

Why did you choose the name tommylucky and not TOMMYLUCKY ?

lol, this guy is funny.

darkuser

ospf helps me too .... it routes packets

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt2/1cfospf.htm

mikej412

Not sure what you're asking about.

You can jump directly to the Forcing the Router ID Choice with a Loopback Interface section of darkuser's link -- if that's what you were asking.

As for assigning a loopback IP address -- its just another interface. Assign it an IP address that doesn't conflict with any other IP address on your router or network.

If you want to create a loopback address to simulate another network to use for OSPF routing practice, give it something other than a 255.255.255.255 subnet mask.