[68493] in North American Network Operators' Group
Re: Load Balancing Multiple DS3s (outgoing) on a 7500
daemon@ATHENA.MIT.EDU (joe mcguckin)
Fri Mar 12 23:26:51 2004
Date: Fri, 12 Mar 2004 20:24:33 -0800
From: joe mcguckin <joe@via.net>
To: "Patrick W.Gilmore" <patrick@ianai.net>, NANOG <nanog@merit.edu>
In-Reply-To: <5AF83DC2-749E-11D8-919E-000A9578BB58@ianai.net>
Errors-To: owner-nanog-outgoing@merit.edu
Patrick,
I suspect that each FE goes to a different AS...
On 3/12/04 7:27 PM, "Patrick W.Gilmore" <patrick@ianai.net> wrote:
>=20
> On Mar 12, 2004, at 10:39 PM, Drew Weaver wrote:
>=20
>> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Does anyone know of an article, or documentation regarding
>> load balancing the traffic on 3 or more FastEthernet interfaces on the
>> outgoing direction? Right now we're running BGP internally, and the
>> routes that are being chosen based upon the final BGP decision step or
>> what I like to call the 'IP address tie breaker' which is not always
>> optimal. We have a cisco 7500 that is connected to 4 other Cisco 7500s
>> which each have 45Mbps ds3s to the Internet, we would like to load
>> balance the outgoing traffic across all 4 of these 7500s, can anyone
>> shine any advice my way? I noticed that there are instructions on
>> Cisco's site regarding doing LB on 12000s.
>=20
> Load balancing with BGP is the same on any cisco router.
>=20
> Are you doing BGP with the routers on the other side of those DS3s? If
> you are, you will need their help in load balancing properly. Get them
> to allow you peering with a loopback interface and use equal cost
> static routes to do the load balancing to that loopback interface.
