HELP! Configuring OSPF between 2 Cisco 2500 Routers!

[KingPhil]

Ok, can anyone tell me how to step by step configure OSPF on 2 cisco 2500 series routers?

They are connected thru the serial ports. They have the ability to connect to them thru the Ethernet terminals.

I'm stumped. I'm looked at every paper on the net from Cisco, and to no avail. I can turn on OSPF, but can't get anything to transfer when connected like that. RIP works fine, but when i turn that off, and tyr OSPF, nothing.

I can't ping the other routers Ethernet port or anything. I am able to ping the serial port though. I MUST be doing something wrong. Please help!

Thanks!

 

[L3Guy]

The commands for ospf are straitforward.

interface loopback 0
ip address a.b.c.d (sets the router ID for the ospf process and gives the router something else to advertise)

Router ospf 1
network 0.0.0.0 255.255.255.255 area 0 (Select all interfaces to play in ospf.)

the magic is in the serial interface.
PPP or hdlc is no problem.
frame relay map commands can block updates with a broadcast parameter.
add the statement" ip ospf network point-to-multipoint" to any frame relay interface to avoid neighbor statements, or use point to point subinterfaces.

Let us know.

Doug

 

[KingPhil]

WHOOO HOOO! Got it working finally! All we had to do was the following:

#config t
#router ospf 1
#network 139.394.229.229 0.0.0.0 area 1
#redistribute rip metric 1

Thats's it! As soon as we did that we went to:

#show ip route

At this prompt it was showing OSPF transfering perfectly.

#show ip protocol

This allowed us to see when OSPF was updating.

Works great, thanks!

 

[Daniel]

Why are you redistributing rip into ospf if you are just trying to setup ospf?

 

[spidey07]

ewwwwwww

 

[L3Guy]

<< WHOOO HOOO! Got it working finally! All we had to do was the following: >>



Good job.



<< ewwwwwww >>


[funny voice] You weely quack me up. You phuny man! [/funny voice]



Doug

 

[spidey07]

strange that it actually worked. OSPF requires a backbone area or area 0.0.0.0.

ps - the reason I said ewwwww is because you're getting into redistribution and without good filtering you can cause yourself a whole world of hurt and headache. if this is only two routers with no other paths (only a single sync connection) then you'll be fine, if there are other paths (backdoors or redundant links?) then we need to talk.

 

[L3Guy]

<< strange that it actually worked. OSPF requires a backbone area or area 0.0.0.0. >>


I've tried it on "the rack". Everything works fine as long as there is a single area. It assumes it dropped the link to the backbone, but it still routes within the area just fine. I tried it with area 51. Go figure. Multiple non-zero areas, well, thats a horse of a different color.

Your point about mutual redistribution is well taken. The multiple routing protocol thing can still keep me awake nights.

Good to have you back.

Doug