[AusNOG] Going Dual Homed (without waste)

[Mark Tees]

Hey James,

Outbound is pretty easy. Check flow data to see which AS's make up your destination traffic or take a punt. Then use BGP local pref to send traffic down the desired BGP session.

Inbound, can sometimes be influenced by reasonable prepending and adding BGP communities that correspond to local preference in your upstream providers network. This depends on your upstreams.

Commercially, Nth percentile will give you the best bang for buck usually in that scenario.


On 26/09/2013, at 5:52 PM, James Mcintosh <james.mcintosh at rocketmail.com> wrote:

> Hi Noggers,
> 
> Somewhat of a follow on from my previous post. I got a lot of comments back saying we should be muti-homed rather than single homed as we currently are.
> 
> I agree, however my question is how do we do so without over-provisioning transit and having too much "waste". If we're currently pumping around 600Mbps of inbound traffic through a single transit provider, how would we equally balance that across two transit providers at 300Mbs each.
> 
> Sure we could advertise some of our IP blocks via transit provider A and other IP blocks via transit provider B but that is hardly my idea of an easy load balancing solution and the traffic levels could still vary dramatically depending on downstream activities.
> 
> Your comments and ideas are much appreciated.
> 
> 
> -James
> 
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