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Internet access router in a multi-homed setup

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toni.zeidler at gmail

Oct 12, 2011, 6:30 AM

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Internet access router in a multi-homed setup

Hi all,

a word of warning first, I'm quite new to this.

We're in the process of re-designing a customers internet accees.
The basics:
Two providers, connected via ethernet, 50MBit to each provider.

In my opinion we should use BGP, but I'm not sure if full-table is necessary.
This leads to the question what hardware we should use...

My first idea was to use 2x 3560E with the services image and receive
a limited set of routes (+default) via BGP. That way we wouldn't need
another access switch.
As the 3560E is limited to 11k routes I'm no longer sure if this is good idea.

The second and idea was to use a pair of 3945Es and and a pair of
296x as access switches as I'm not sure what I should think of the
"Cisco Enhanced EtherSwitch" Cisco advertises for the 3945E.

Any suggestions and comments regarding the hardware are considered helpful.

Kind Regards,

Björn

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peter at rathlev

Oct 12, 2011, 10:44 AM

Post #2 of 2 (131 views)
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Re: Internet access router in a multi-homed setup [In reply to]

On Wed, 2011-10-12 at 15:30 +0200, Anton BjÃ¶rn Zeidler wrote:
> Two providers, connected via ethernet, 50MBit to each provider.
>
> In my opinion we should use BGP, but I'm not sure if full-table is necessary.
> This leads to the question what hardware we should use...
>
> My first idea was to use 2x 3560E with the services image and receive
> a limited set of routes (+default) via BGP. That way we wouldn't need
> another access switch.
> As the 3560E is limited to 11k routes I'm no longer sure if this is good idea.

We have two connections to the same ISP and use 3560G's running BGP and
receiving just default routes. We're happy with it; if you only need
failover and no load-sharing the price/performance of the 3560G/E/X is
hard to beat.

Beware that the CPU is weak, and make sure to use access-lists and
policing to counter problems. OTOH the device can actually protect
itself nicely in hardware, so if done right it will survive more than
most software routers.

I'd say use the 3560.

--
Peter

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