From: Antonio Soares (amsoares@netcabo.pt)
Date: Tue Jul 03 2007 - 14:09:18 ART
You can find the formulas used to calculate the RTO in this Book:
EIGRP Network Design Solutions by Ivan Pepelnjak.
Basically the value is a function of the SRTT and some Pacing Timers.
I configured 3 routers with EIGRP and i noticed high RTO values:
+++++++++++++++++
R1#sh ip eigrp neighbors
IP-EIGRP neighbors for process 123
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
1 12.12.12.2 Se0/0 136 00:00:48 1 3000 0 2
0 13.13.13.3 Et1/0 10 00:01:18 1 4500 0 2
R1#
+++++++++++++++++
R2#sh ip eigrp neighbors
IP-EIGRP neighbors for process 123
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 12.12.12.1 Se0/0 149 00:04:54 24 200 0 2
R2#
+++++++++++++++++
R3#sh ip eigrp neighbors
IP-EIGRP neighbors for process 123
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 13.13.13.1 Et0/0 11 00:04:59 651 3906 0 1
R3#
+++++++++++++++++
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2k4@gmail.com
Sent: terga-feira, 3 de Julho de 2007 13:19
To: Cisco certification
Subject: Fwd: EIGRP - RTO value - 3d Try
Hi, my 3d try. pls help. thx
---------- Forwarded message ----------
From: ccie2k4@gmail.com <ccie2k4@gmail.com>
Date: Jun 30, 2007 9:37 PM
Subject: EIGRP - RTO value
To: ccielab@groupstudy.com
Hi, can anyone please confirm if it is normal to have a RTO value of 5000 in
the output of a show ip eigrp neighbors. I seem to be seeing this in a lot
of devices. The RTO counter as defined means that "the amount of time that
EIGRP will wait to retransmit a reliable packet from the retransmission
queue." I have read examples and seen a couple of posts that lean towards
saying that this isn't good however I am not so certain if this is true or
not. There seem to be no problems on the links (not dropping any pings) and
the drop counters are not incrementing. The Q cnt is 0 which I am sure is
good. Could someone please confirm the RTO counter. Thx
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