OSPF virtual link problem.

[alexcjuz]

HI,

I have config a lab using packet tracer.

Two Broken area 0 use C1 and C2 virtual link  to connect.

the virtual link looks work, but I cann't ping each others by anywhere.

could someone help me.

[MHM Cisco World]

You use 4.4.4.4 & 1.1.1.1 but this IP must not be use under any area 
so remove 4.4.4.4 and 1.1.1.1 from OSPF area and check again. 

[alexcjuz]

Actually, the lab is from CCNP's book.

Anyway, I have changed the loopback 0 address and use router-id instead of.

but the result is the same.

[MHM Cisco World]

please I open the lab now, 
which router can not connect to other ?
all route are learn from C13 AND C23
so everything is OK 

[alexcjuz]

HI MHM,

Yes, my routing table as good as yours.

But you could try "from C13 to Ping any C21 ,C22 or C23", it will not success. Even ping from C2 can not reply by C12, C13 and C14。

Thank you

[MHM Cisco World]

Friend I follow all router and I found issue here 

you here have four process and this make ping and traceroute not work after make 

2911 both have two area 1 and area 0 with one process ospf 1

make 2911 Cxx all in area 0 ospf 0

make 2911 Cyy all in area 0 ospf 0

make 2911 B1 & B2 in area 1 ospf 1 

and it work fine and I can ping and traceroute. 

[Georg Pauwen]

Hello,

post the instructions you are following. There are a lot of area/process mismatches and also multiple OSPF processes...

[alexcjuz]

HI, its from  CCNP Routing and Switching ROUTE 300-101 Official Cert Guide  page 290 ,291,292..

[Georg Pauwen]

Hello,

I don't know what is in the book (can you post a readable screenshot) ? 

[alexcjuz]

HI Georg,

as attached file 

[MHM Cisco World]

I CHECK THE PAGE
and sorry I will be with my previous solution, 
make the process same, 
ospf not must be same in two different routers but 
what I am sure is router with two process need redistribute. 

so I think this is PKT limit with wrong doc. (I think) make this lab impossible for me. 

good luck friend 

[paul driver]

Hello
I believe this can be due to the limitation of ospf in PT, you probably need to disable capability transit on the ABR rtrs which i doubt will be applicable in that simulation software

router ospf x
no capability transit

[alexcjuz]

Hello Paul,

Interestingly, when I received your reply, I open the packet tracer again and trying to use your solution.

When I open the project, it's all  fine. I mean it all work. even I have not touched any config.

So, is it by chance the PT will work? Because I have tried to reopen PT 3-4 times and never success but this time.

Alex

[alexcjuz]

Hi Paul,

I have tried your solution. But the PT router has no such command

no capability transit.

Alex

[alexcjuz · Accepted solution]

HI all.

I think I found a solution, although I can not understand the theory in it.

The solution is " make sure the two ABR routers will become the DR for their connected AREA 0".

I have config the two routers

int gi 0/0 with  ip ospf priority 150

and then every thing is fine until now.(I have tried reload 3 times).

Sharing this for everyone here for help.

Alex Chang