01-26-2011 08:07 AM - edited 03-04-2019 11:12 AM
I am practicing setting up OSPF virutal links and I never have done it before. I have a setup with 4 routers setup as follows.
R1---area0--------R2----------area11-----------R3-----------area54-----------R4
I want to be able to ping from R4 to R1.
I have attached all the configs and info. I must be overlooking something easy. What am I doing wrong?
Thanks,
Mike
Solved! Go to Solution.
01-26-2011 09:30 AM
Hi Mike,
I agree with Giuseppe's suggestions. In addition, check all your IP addresses at each link and that neighbors are forming at each one of these. I haven't checked all the configs, but from those 2 I checked, I think you have at least a duplicate IP address problem somewhere.
Kind Regards,
Maria
01-26-2011 09:03 AM
Hello Mike,
ensure that OSPF router-id on ABR nodes are those intended by using
R2
router ospf 1
router-id 2.2.2.2
R3
router ospf 1
router-id 3.3.3.3
virtual link attempts to connect to the router with router-id = IP address specified in the command
I also recommend to use /32 IP addresses as loopback addresses as a good habit
these loop addresses can also be advertised in OSPF, but contrary to my personal belief it is not necessary.
Again I usually advertise the /32 IP of loopback.
Hope to help
Giuseppe
01-26-2011 09:54 AM
Thanks for your help Giuseppe. I will follow your best habits recomendations. I did try it with out the router-id line and it worked when I corrected the duplicate IP address. I will going forward use it just for better control.
Thanks for your help.
Mike
01-26-2011 09:30 AM
Hi Mike,
I agree with Giuseppe's suggestions. In addition, check all your IP addresses at each link and that neighbors are forming at each one of these. I haven't checked all the configs, but from those 2 I checked, I think you have at least a duplicate IP address problem somewhere.
Kind Regards,
Maria
01-26-2011 09:51 AM
Thank you both for your help.
Maria, It was the duplicate ip address....
I went over and over it and just skipped right over it.....thanks
Mike
PS.
Wish me luck on my first CCNP Route exam...... I need it
01-26-2011 10:09 AM
Hi Mike,
I figured you were studying for an exam. I mean, why would anyone practice virtual links all of a sudden? Yes, I know, there is also the pleasure of it!
I wish you all the best, but what do you mean your "first"? You mean there will be a second?
Kind Regards,
Maria
01-26-2011 10:44 AM
Hopefully not a second ROUTE exam...but I do have the SWITCH and TSHOOT....Then I can be a coveted CCIE Candidate.
Mike
01-26-2011 11:35 AM
Mike, you need to pass the CCIE Written first to become a CCIE candidate! No CCNP exams are required!
Good luck with you exams!
01-26-2011 11:55 AM
Oh...I thought I just needed to think about taking the CCIE written and that was it....
Mike
01-26-2011 12:10 PM
LOL! Sorry to disappoint you Mike!
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