L2l VPN tunnel is reset during the generate a new IPSec key

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  Remember to make changes to the computer before the show?

  You can follow the below methods:

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  Kind regards

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  Thanks in advance

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  Hello

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  -Jouni

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  Hello

  I set up several routers for EIGRP authenticated using a keychain. I have configured each key for about 6 months of validity:

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  This configuration should provide accept overlap between key 1 and key 2 during the entire 24 hours of 31 March 2014. The send key rollover should happen at noon on 31 Mar 2014 (giving the router 12 hours of cushion for time variance).
  

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  1 send to life key until11:59:59 EDT Mar 31 2014

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  Mar 31 11:59:59.891: EIGRP: Received HELLO on Serial1/0 nbr 10.0.0.2
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  Mar 31 12:10:47.623: EIGRP: Received HELLO on Serial1/0 nbr 10.0.0.1
  Mar 31 12:10:47.627:   AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0 peerQ un/rely 0/0
  Mar 31 12:10:47.931: EIGRP: Sending HELLO on Serial1/0
  Mar 31 12:10:47.935:   AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
  Mar 31 12:10:52.067: EIGRP: Dropping peer, invalid authentication
  Mar 31 12:10:52.071: EIGRP: Sending HELLO on Serial1/0
  Mar 31 12:10:52.075:   AS 1, Flags 0x0, Seq 0/0 idbQ 0/0 iidbQ un/rely 0/0
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  So if R1 (or any other router) would hit 1 second interval, he would have sent package HELLO without authentication at all leading to the fall of the neighborship.

  It is maybe it happened, maybe not. Just an idea.

  BTW. If you want to ensure that this reversal will be correctly you must rewrite your keys up to something like this:

  Key1

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  send-lifetime 12:00 October 1, 2013 12:00:05 March 31, 2014

  2 key

  accept life 00:00:00 March 31, 2014 23:59:59 October 1, 2014

  send-lifetime 12:00 March 31, 2014 11:59:55 October 1, 2014

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  Best regards

  Jan

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  Hello
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