RE: static routing

From: Keoseyan, Scott (SAKeoseyan@broadwing.com)
Date: Fri Nov 19 1999 - 10:12:07 EST


Actually that "Gateway set to 0.0.0.0" is what you end up with when you
specify your default gateway as an interface in the IP route statement...
goofy, but true.

What you propose will give him per-packet load balancing... but wouldn't it
just be better to turn on CEF and run multiple default route statements
pointing down each T1?

One question I had about that strategy is... does CEF work when you specify
interfaces as gateways in your static route statements... or does one need
to put IP addresses in for it to work correctly... or does it matter at all?

Scott

-----Original Message-----
From: Scot Donovan Blair [mailto:sblair@cerf.net]
Sent: Thursday, November 18, 1999 11:08 PM
To: cisco-nsp@puck.nether.net
Cc: cisco-nsp@puck.nether.net
Subject: Re: static routing

Paul,

   Equal cost static routes should work fine to balance between your T1's.
I would note turning route-cache off the interface may be useful as well
(this is always debatable). Something that looks odd to me is the below
snipet of your info..

"Gateway of last resort is 0.0.0.0 to network 0.0.0.0"

Without seeing the config I would be just guessing but it appears as if
maybe you have default-gateway set to 0.0.0.0.. it's a guess. Im not sure
what your problems are *exactly* but if you are trying to load balance
between multiple T1's it should be more than OK to have equal costs
statics to multiple interfaces .

-blair
AT&T CERFnet
Backbone Engineering and Planning

| PGP Public Key: www.hfh.com/blair/pgp.txt |

On Thu, 18 Nov 1999, Paul Jacobs wrote:

> I have a simple question (I hope).....
>
> I now have 3 T-1's in my 3640 Cisco and need to place static routes to
> different T-1's so all traffic does not go out 1 single T-1..
>
> Below is my current ip route statements:
>
> ip route 0.0.0.0 0.0.0.0 Serial1/0:1.1
> ip route 127.0.0.0 255.0.0.0 Null0
> ip route 0.0.0.0 0.0.0.0 serial 0/0
>
>
> And my 'sh ip route' output:
>
> Gateway of last resort is 0.0.0.0 to network 0.0.0.0
>
> C 208.239.156.0/24 is directly connected, FastEthernet1/0
> S 127.0.0.0/8 is directly connected, Null0
> 63.0.0.0/24 is subnetted, 1 subnets
> C 63.64.44.0 is directly connected, Ethernet0/1
> S* 0.0.0.0/0 is directly connected, Serial1/0:1.1
>
> I am doing something wrong because if I define my routes via ip route
> statement(s) and remove the 0.0.0.0 0.0.0.0 ip route traffic gets in but
> not out??
>
> Any help any one can offer is welcome...
>
> Paul Jacobs
> Network admin
> http://www.netpacq.com
>
>



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