[afnog] Multiple Gateways on a Server

[Bruce Zamaere]

Mark,

Many thanks... skimmed through the documentation and I think this is
exactly what I need.

best regards,

Bruce.

On 9/24/07, Mark Tinka <mtinka at globaltransit.net> wrote:
> On Monday 24 September 2007 23:14, Bruce Zamaere wrote:
>
> > Hope the ascii drawing looks alright.
>
> The ASCII was a bit broken (on my mailer, anyway). It's no
> big deal... :-).
>
> > Simply put. I have
> > a server farm that is on a lan with two routers. I want
> > to be able to configure the servers to use both routers.
> > Load balancing or load sharing isn't really a concern
> > here. Is it possible to have two default gateways for
> > these servers? Servers are running Linux... routers are
> > all Cisco.
>
> Sounds like a job for GLBP (Gateway Load Balancing
> Protocol).
>
> Like HSRP and VRRP, GLBP provides first-hop router
> redundancy to downstream hosts, but also provides for load
> balancing.
>
> Consider the following URL for additional information
> (including configuration examples):
>
> http://tinyurl.com/ynvy6x
>
> HSRP does support load balancing as well, via M-HSRP
> (Multiple HSRP) groups. VRRP load balancing support
> utilizes a similar architecture. However, both these
> protocols suffer from the same problem when you need them
> to support load balancing; half your hosts need to be
> configured for one virtual default gateway, while the other
> half are configured for the second virtual gateway. This is
> burdensome and adds complexity.
>
> GLBP (as is HSRP) is Cisco proprietary, as far as I recall.
> However, as yours is an all-Cisco network, this should not
> be a problem.
>
> Cheers,
>
> Mark.
>
>