Kevin Dorrell, CCIE #20765

23 May 2008

EIGRP timers

Filed under: EIGRP — dorreke @ 19:15

Well, anyone can see that this blog entry is incomplete.  I am just dumping the console logs here so I can format them up and explain them later.  Anyone care to hazard a guess as to what I am trying to show?  ;-)

R1:

R1#show run int f0/0.12
Building configuration...
Current configuration : 197 bytes
!
interface FastEthernet0/0.12
 encapsulation isl 12
 ip address 172.16.12.1 255.255.255.0
 no ip redirects
 ip hello-interval eigrp 200 3
 ip hold-time eigrp 200 10
 no snmp trap link-status
end
R1#show ip eigrp neighbor f0/0.12
IP-EIGRP neighbors for process 200
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   172.16.12.2             Fa0/0.12          74 00:00:25   12   200  0  6

And R2:

R2#show run int f0/0
Building configuration...
Current configuration : 156 bytes
!
interface FastEthernet0/0
 ip address 172.16.12.2 255.255.255.0
 ip hello-interval eigrp 200 30
 ip hold-time eigrp 200 100
 duplex auto
 speed auto
end
R2#show ip eigrp neighbor f0/0
IP-EIGRP neighbors for process 200
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
0   172.16.12.1             Fa0/0              8 00:00:35    8   200  0  9

So there you have it …

 

4 Comments »

  1. How about the hello-interval and hold-time not being the same on each side?

    Johan

    Comment by Johan Denoyer — 23 May 2008 @ 21:12

    Reply

  2. That’s on the right track. Look at R1’s hold timer vs. R2’s hello timer. Still the adjacency is stable. I’ll try and edit it up properly tomorrow.

    Comment by dorreke — 24 May 2008 @ 00:02

    Reply

  3. Somehow i missed the point. Probably lost in translation :) Anyway … nice blog to visit.

    cheers, Sinuousness

    Comment by Sinuousness — 21 Jun 2008 @ 11:24

    Reply

  4. Sinuousness,

    I wrote up the experiment properly a couple of days later: http://dorreke.wordpress.com/2008/05/25/eigrp-timers-solution/

    The point I was trying to make is that many people say that the hold timer configured on R1 must be n times the hello timer configured in R2, and vice versa. But that is not true. The hello packet carries the hold timer with it. So the hold timer configured on R1 should be n times the hold timer on R1 instead.

    Comment by dorreke — 23 Jul 2008 @ 07:59

    Reply

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