[AusNOG] Scaling beyond 1Gbps transit [SEC=UNCLASSIFIED]

[Tom Sykes]

UNCLASSIFIED
I think you have a couple of issues to consider

1. which is the most cost effective interface combination (nx1G or 1x10G) and
2. whether you will remain with a single transit provider

On the cost issue, it will depend how much your transit provider charges for 10G interfaces vs. multiple 1G. Also will depend on your chosen platform - I had heard figures that the breakeven was about 3 or 4 x1G interfaces before 10G made sense (obviously will vary). 

If you go with multiple 1G interfaces, the next question would be how to spread traffic across them as a bundle. One simple way might just be to use LAG and the multiple 1G links become one virtual link rather than worrying about extra BGP sessions. Of course, this is based on the assumption you have a single transit provider and that they also support things like LAG. 

Tom



-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of James Mcintosh
Sent: Tuesday, 24 September, 2013 4:31 PM
To: ausnog at lists.ausnog.net
Subject: [AusNOG] Scaling beyond 1Gbps transit

Hi Noggers,

Our transit link is currently running at 600Mbps with a Cisco 7201 at the edge. I'm needing to create a plan for going beyond 1Gbps of transit. What are people doing when they hit the hard interface limit of 1Gbps on their edge routers?

Are you hooking up 10Gbps gear to your transit provider or are you running multiple 1Gbps links to them? If the latter, how are you going about this? e.g. multiple edge routers with multiple BGP sessions?

I'd really appreciate your thoughts and comments on going beyond 1Gbps.


-James
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