Packet Tracer 5 and OSPF

Hey,

Not sure if anyone will be able to answer this but if someone can then great. I'm testing OSPF layouts as I go along with CBT Nuggets ICND2. Jeremy is talking about default-information originate to transfer the default route into OSPF but it's not working for me in packet tracer. The command is recognised but it's not changing the route to type E2. I don't think I'm doing it wrong. There are also other commands that dont work, such as area 1 range. I suspect that packet tracer just doesn't support multiple areas but if anyone was able to confirm this then that would be some great peace of mind.

I've got 2 routers here that I can fire up if need be but I've actually found packet tracer to be pretty damn useful. I've just thrown down a 10 router OSPF layout in minutes.

edit. I think this is to do with areas. I thought I setup a 2nd area on one of my routers but it's not sending out the routes. The command is definitely in running-config

Thanks

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captobvious

Is the connection up/up?

dtlokee

do you have an existing static default route in the routing table on the router with the "default information orginate" command?

tenrou

Hey,

The conenction is up/up and the route is definitely in the routing table. It's currently showing as the gateway of last resort.

Thanks

billyr

Im pretty sure Packet tracer doesn't support multi area OSPF

billscott92787

I believe the Packet Tracer 4.1 software did not support multiple areas. But, I just configured a 3 router setup with OSPF with two different layers and mine is working properly. Can you send the running-config info? PM me

captobvious

billyr wrote: »

Im pretty sure Packet tracer doesn't support multi area OSPF

I set up a multi-area OSPF topology in Packet Tracer 5 and it works fine. I did have to save configs and recycle one of the routers to get the full neighbor relationship.

tenrou

Okay, so I've botched something up then?

I'll have another look at this when I got home from work then.

Cheers

tenrou

Okay I am seriously confused now.

I've got the 2nd area working kind off. Its sending it out via ospf and I can ping the inteface connected to the abr but i can't ping the ip address of the router at the other end, even though I can from the abr.

edit: okay I gave up and started again, everything works when i use only 2 interfaces per router but when i add a 3rd it all goes haywire. Am I mising something?

tenrou

The CCNA is only one area OSFP I believe so maybe I'd be better off focusing on jsut that until I've got a breadth of knowledge to be properly takling this.

Xenz

Have you tried using debug commands to see if you can find a problem with your configuration?

I'd need to see the output from
show ip route
show ip protocols
show ip ospf database
show running-config
to see where the problem lies. If you could send me the pkt file or you could add more information about your network I'm sure some of us could help more.

As far as packet tracer goes, it has some interesting bugs sometimes. I would not count on it for much more than CCNA studies. Cisco E-Learning mentions only single area OSPF
Learning Offerings

If you think it could be a configuration error then give us some more information.

tenrou

Will do, thanks for the help everyone.

It's one of those things that I feel like working through will do me a lot of benefit so I'm trying to work through it myself where possible. I'll maybe hit up GNS3 (SP?), it may be the better option here.

captobvious

Xenz wrote: »

Have you tried using debug commands to see if you can find a problem with your configuration?

I'd need to see the output from
show ip route
show ip protocols
show ip ospf database
show running-config
to see where the problem lies. If you could send me the pkt file or you could add more information about your network I'm sure some of us could help more.

As far as packet tracer goes, it has some interesting bugs sometimes. I would not count on it for much more than CCNA studies. Cisco E-Learning mentions only single area OSPF
Learning Offerings

If you think it could be a configuration error then give us some more information.

How about show ip ospf neighbor?

GNS3 has been good for me. I wasn't into it much when I first started but I have grown to like it.

tenrou

They show up in show ip ospf neighbor until the dreaded 3rd interface goes on and then it falls to bits.

I had a setup where 1 router had 4 interfaces and one same area and one dififerent area route weren't being shown. I removed the not working same area interface and suddenly show ip ospf neighbor detected the 2nd are and it appeared in the other routs routing table.

I can't help but suspect packet tracer, but I'll check it out in GNS3 and see if I can get it working.

Thanks

AlexMR

OSPF is a huge routing protocol and Packet tracer is a simulator for the CCNA exam topics, which dont include complex Multiarea OSPF.

If you want to try all thre possibilities of OSPF then it is dynamips or even better, GNS3. Or even better real equipment obviously.

Good luck.

tenrou

Wow, just read that back and I appologise for my typing there, knocked that one out in a bit of a rush during my lunch break.