From: Ben Rife (brife@xxxxxxxxxx)
Date: Tue Nov 09 1999 - 20:38:44 GMT-3
Make sure you don't have the statement "no ip route-cache" on your router's
serial interfaces. If it is configured, it will round-robin switch packets
over the available paths to the destination when there are multiple paths,
independent of the routing protocol, I believe. I have had this problem in
the past as well. Let me know if this helps.
(26 days)
Ben
----- Original Message -----
From: Rahmlow, Howard F. <howard.rahmlow@unisys.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, November 09, 1999 10:24 AM
Subject: Frame Relay and Trace Route
> I'm using a 4500 router as a Frame switch, with 3 routers as end points.
The
> Frame is fully meshed. Using the setup very close to Caslow pg 138.
> Everything works fine, I can ping all the ip address, and telnet from one
> router to the next with no problems. When I do a trace route, if the
address
> is not a connected router. The trace seems to bounce around.
>
> Example
> R2501#show ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR
>
> Gateway of last resort is not set
>
> 172.16.0.0/24 is subnetted, 3 subnets
> C 172.16.1.0 is directly connected, Serial1.2
> O 172.16.2.0 [110/128] via 172.16.1.2, 3d19h, Serial1.2
> [110/128] via 172.16.3.2, 3d19h, Serial1.3
> C 172.16.3.0 is directly connected, Serial1.3
> R2501#trace 172.16.2.1
>
> Type escape sequence to abort.
> Tracing the route to 172.16.2.1
>
> 1 172.16.3.2 4 msec
> 172.16.1.2 8 msec
> 172.16.3.2 8 msec
> R2501#
>
>
> As you can see it goes to 172.16.3.2, then to 172.16.1.2, then back to
> 172.16.3.2
>
> Any ideas, am I missing something, I don't think its normal. I get the
same
> resault with OSPF, RIP, EIGRP ect..I also have reloaded all the routers a
> few times, and get the same thing.
>
> Thanks
> Howard
>
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