RE: Traceroute and load balencing

From: Stephen Skinner (stephen_ski@hotmail.com)
Date: Fri Jan 30 2004 - 14:07:43 GMT-3


hi,

what you are seeing is correct ...you will also see that there are multiple
routes in your route table ..with 1 having a * next to indicating which is
the last route used

hth steve

>From: <alsontra@hotmail.com>
>Reply-To: <alsontra@hotmail.com>
>To: <ccielab@groupstudy.com>
>Subject: Traceroute and load balencing
>Date: Thu, 29 Jan 2004 18:41:18 -0800
>
>Group,
>
>I think I know the answer to this one, but I would like to be sure. The
>example topology is as follows:
>
> ________
>Host A ----R1_______ R2------ Host B
>
>
>R1 and R2 are doing load balancing OSPF, EIGRP, whatever its not important.
>
>
>Host A pings Host B and the trace that comes back should not be exactly
>linear
>correct? Load balancing would cause some packets to take route 1 vs. route
>2.
>(round robin)
>
>
>I have a similar situation in my home lab and want to make sure what I'm
>seeing is actual the result of load balancing.
>
>
>The traces look something like this when I have load balancing enabled.
>
>Tracing the route to 111.1.1.1
>
> 1 160.1.1.6 4 msec
> 150.1.1.2 0 msec
> 160.1.1.6 0 msec
> 2 141.1.1.5 32 msec
> 141.1.1.9 36 msec
> 141.1.1.5 36 msec
> 3 171.1.1.3 36 msec 36 msec 32 msec
> 4 180.1.1.8 36 msec
>
>
>And when only one link is available the trace looks like this:
>
>Tracing the route to 111.1.1.1
>
> 1 160.1.1.6 0 msec 4 msec 4 msec
> 2 141.1.1.9 28 msec 32 msec 36 msec
> 3 171.1.1.3 32 msec 36 msec 32 msec
> 4 180.1.1.8 36 msec * 32 msec
>
>
>
>All ping attempts are successful and no data is ever lost. I'd just like to
>verify that traceroute is actually displaying load balancing.
>
>
>Alsontra
>
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