This is exactly what I have done and I have used it before. But for some
reason only the one link was being used. I wanted to see if you all had
any ideas before calling tac. I think what I might do this morning is
flash the router with a different IOS and see if that helps if not then
I will call tac. I might end up leaving it as it is without cef because
without it everything works like a charm.
, ,
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`-^--'`From: "Elijah Savage"
>Reply-To: "Elijah Savage"
>To: [EMAIL PROTECTED]
>Subject: 2 T1 load balancing not working [7:32239]
>Date: Wed, 16 Jan 2002 20:42:57 -0500
>
>All,
>
>I had to setup a 2621 to do load balancing over 2 t1's with ospf. I
know
>ospf does this on a basic simple default setup. So after setting this
up
>everything seemed to be working great but one link was definately being
>used about 80% more than the other. So after doing some reasearch on
cco
>I realized my problem I had ip route-cache turned on under the
interface
>on both serial interfaces. According to
>http://www.cisco.com/warp/public/105/46.html it works alot better by
>turning this off so I did and was getting just about 50/50 load
>balancing accross both t1's. But in my quest of always trying to make
>the network more efficient I saw at the bottom of that page on the link
>above this statement below.
>
>Newer switching schemes such as Cisco Express Forwarding (CEF)
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/
s
>witch_c/xcprt2/xccefc.htm allow you to do per-packet and
per-destination
>load-balancing more quickly. However, it does imply that you have the
>extra resources to deal with maintaining CEF entries and adjacencies.
>Refer to this Application Note
> for more
>information on load-sharing with CEF.
>So I went of the info on that URL to setup ip cef on the router and ip
>load sharing. But after clearing the counters and doing a show
interface
>I could see all traffic going accross only one serial interface. I am
>using IOS 12.1 and I had ip cef turned on globally and on both
>interfaces locally as the doc stated, but only 1 link was being used.
>
>Any ideas why?
>
>
>
>
>
>
> , ,
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