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4286 Views 19 Replies Latest reply: Apr 28, 2012 8:08 PM by Patrick RSS Go to original post 1 2 Previous Next

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  • Ahmed 114 posts since
    Nov 14, 2010
    Currently Being Moderated
    15. May 17, 2011 5:26 AM (in response to Aninda)
    Re: EIGRP Authentication

    to simplify this go to there a video tutorial on how to set up ntp master and ntp client,

    but read the doc. as well in order to understand the theory behind it.

  • Ahmed 114 posts since
    Nov 14, 2010
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    16. May 17, 2011 5:30 AM (in response to Aninda)
    Re: EIGRP Authentication
  • chris reynolds 352 posts since
    Jun 8, 2009
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    18. May 17, 2011 7:47 AM (in response to Aninda)
    Re: EIGRP Authentication

    Getting the NTP setup and running would be a great thing and good added knowledge.


    I am pretty positive that I have tested running these EIGRP Auth labs and been able to get them running just by getting all of the routers timed at the same time. I have done it just by setting it up on my R1 router, copy the command I just put in and paste it into the others. It only put the routers off by a few seconds and then my neighborships formed after I changes the times on there.


    Strange that it would not do it for you unless there are some of the interface commands being missed on some of the other routers. I believe some others have suggested to verify that as well.

  • Patrick 352 posts since
    Apr 4, 2011
    Currently Being Moderated
    19. Apr 28, 2012 8:08 PM (in response to chris reynolds)
    Re: EIGRP Authentication

    Thank you Ahmed and everyone for mentioning that NTP needed to be setup on the routers. I struggled for 2 days beating my head against the wall on this issue. After reading this post, I configured NTP on my routers and EIGRP Authentication finally started working!!!


    R1#show ip eigrp int detail
    IP-EIGRP interfaces for process 10

                            Xmit Queue   Mean   Pacing Time   Multicast    Pending
    Interface        Peers  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes
    Se0                1        0/0        56      10/380        640           0
      Hello interval is 2 sec
      Next xmit serial <none>
      Un/reliable mcasts: 0/0  Un/reliable ucasts: 27/30
      Mcast exceptions: 0  CR packets: 0  ACKs suppressed: 4
      Retransmissions sent: 0  Out-of-sequence rcvd: 1
      Authentication mode is md5,  key-chain is "EIGRP_KEYS"


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