RE: EIGRP behaviour on different interfaces

From: Michael Stout (michaelgstout@hotmail.com)
Date: Sun Jul 09 2006 - 22:25:40 ART


Here are two links you may find helpful
http://www.cisco.com/univercd/cc/td/doc/cisintwk/idg4/nd2003.htm#wp3405

http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094063.shtml#nosub

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  From: "sugam agrawal" <netshikhar@gmail.com>
  Reply-To: "sugam agrawal" <netshikhar@gmail.com>
  To: "Cisco certification" <ccielab@groupstudy.com>
  Subject: EIGRP behaviour on different interfaces
  Date: Sun, 9 Jul 2006 16:07:38 +0530
  Hi,

  I have 2 queries...

  1. I have some confusion around hello/dead time on different
  interfaces....Please let me know whether I am correct here...

  PPP, HDLC Point-to-Point links > T1 <=> 5/15 secs
  PPP, HDLC Point-to-Point links =< T1 <=> 60/180 secs
  FR Point-to-Point links with speed > T1 <=> 5/15 secs
  FR Point-to-Point links with speed =< T1 <=> 60/180 secs
  FR Multipoint links with speed > T1 <=> 5/15 secs
  FR Multipoint links with speed =< T1 <=> 60/180 secs

  If the above is true, it means that the hello/dead time depends on
  bandwidth
  and not on type of interface.

  Am I corrcet ?

  2. Two routers are connected in following way....running EIGRP

  R1(multipoint, speed T1) ----------------FR
  Cloud-------------------------(point-to-point, >T1 speed)R2

  By default EIGRP would use a hello interval --> 60 secs on R1
  --> 5 secs
  on R2

  Though the neighborship would be formed b/w R1 and r2, wudn't it flap
  on R2
  as the ACK/Hellos received from R1 wud always be after its hold
  time(15
  secs).

  Thanks,
  Sugam

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