Skip navigation
Cisco Learning Home > Certifications > Routing & Switching (CCNA) > Discussions

_Communities

This Question is Not Answered 1 Correct Answer available (4 pts) 2 Helpful Answers available (2 pts)
2555 Views 8 Replies Latest reply: Dec 27, 2011 4:45 AM by Ryanlk18 RSS

Currently Being Moderated

OSPF Adjacency problem

Dec 21, 2011 8:00 AM

Mike Jamrog 84 posts since
Apr 18, 2010

Has anyone seen anything like this before.

 

Dec 15 18:37:10: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:37:11: %OSPF-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/1/0:0 from DOWN to INIT, Received Hello

Dec 15 18:38:11: %OSPF-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/1/0:0 from INIT to DOWN, Neighbor Down: Dead timer expired

Dec 15 18:38:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:38:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:38:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:38:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:39:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:39:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:39:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:39:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:40:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:40:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:40:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:40:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:41:15: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:41:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

Dec 15 18:41:45: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to down

Dec 15 18:41:55: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1/0:0, changed state to up

 

 

These are logs from a Cisco 3925 IRS router.  Sitting at the other end is a Cisco 2611XM connected via a T1.

 

I have't ran a debug ip ospf adjancency yet, because I have to wait until after hours.

 

What I am doing is migrating the 2611XM off from a Cisco 3660 to a Cisco 3925.

 

I have checked all the common things.  Correct subnet/masks, correct hello and dead timers.

  • Vijay Swaminathan 491 posts since
    Aug 29, 2008
    Currently Being Moderated
    1. Dec 21, 2011 8:48 AM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    Hi Mike,

     

    Looks like you have a problem in forming OSPF neighborship.

     

    You are not receiving hello packets from the neighboring router.

     

    Can you pls share the configuration of your current and the remote router? That will help us in troubleshooting your problem

     

    -Vijay

  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,396 posts since
    Oct 7, 2008
    Currently Being Moderated
    2. Dec 21, 2011 10:34 AM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    It's every 20 seconds down and up in 10 seconds, and it's a serial thing.

     

    You have a keepalive mismatch on your serial link....  OSPF isn't getting a chance yet.

     

    Scott

  • Brian 2,971 posts since
    Aug 17, 2009
    Currently Being Moderated
    4. Dec 21, 2011 4:44 PM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    This is not an OSPF problem, but a serial connection problem.  Take a look at the output of your "sh int s0/1/0:0" command on the 3925.

     

    3925-1#show interfaces serial 0/1/0:0
    Serial0/1/0:0 is down, line protocol is down

     

    it is showing as "Down/Down".  I would check the configuration of the T1 controller on the 3925 as well as a possible cabling problem.  Do you have the correct pin out for the T1 cable on the 3925 side?  Did you configure the T1 controller with the correct framing, line code, number of channels and clocking?

     

    Can you provide the output of the "sh run" command for each router.

     

    Brian

  • Brian 2,971 posts since
    Aug 17, 2009
    Currently Being Moderated
    6. Dec 22, 2011 9:33 AM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    Ok, this was not clear from your previous posts.  So, when you had the 3925 connected to the 2611XM via the T1, what was the state of the interfaces?  Can you provide the configuration for the 2611Xm and 3925 regarding the T1 controller and serial interfaces.  Thanks.

     

    Brian

  • Scott Morris - CCDE/4xCCIE/2xJNCIE 8,396 posts since
    Oct 7, 2008
    Currently Being Moderated
    7. Dec 22, 2011 8:19 PM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    You also have some CRC and framing errors which may account for your interface resets...

     

    Strange that it's on the timeline noted above, but may just be coincidence!

     

    But it's a physical problem someplace.

     

    Scott

  • Ryanlk18 1 posts since
    Dec 2, 2009
    Currently Being Moderated
    8. Dec 27, 2011 4:45 AM (in response to Mike Jamrog)
    Re: OSPF Adjacency problem

    I have a similar problem.  I have a 3662 router with a T1CSU module that goes to a T1 line to a 3640 with the same module.  When I upgraded the 3662 to a 3845 with the 8CE1T1 PRI module, my serial interface drops randomly.

     

    The drops do not occur at a given interval and my interface runs clean until the it drops and then I take input and CRC errors.  I'm going tomorrow to the remote location to swap back to the 3662 to see if the problem clears up, but I'm at a loss.

     

    The Telco came out and looked at the line and said they were running clean.  They were running dirty at first, but they swapped pairs on the T1 and then said it was clean.

     

    Mike, did you ever get this figured out?

Actions

More Like This

  • Retrieving data ...

Bookmarked By (0)