On Tue, 25 Jul 2000 [EMAIL PROTECTED] wrote:
> I trying to add redundency to my network at work (I work for a very small
> local ISP) and I'd like to run BGP on this router so that if line A dies to
> upstream provider A, line B will take over to upstream provider B.
>
> What is the least requirement for BGP? Someone told me I needed at least a
> /20 of IP's from ARIN. Someone else told me that I need SWIP instead of
> RWHOIS. So I'm left wondering exactly what is the minimum overall
> requirements to run BGP?
There is none. You can be single homed and run BGP (But why do that?).
Basically anytime you are multihomed, and the goal is transit for your
customers, then I would say you want to run BGP. Will your upstreams
filter something you have less than a /20? Probably not. Alot of ISP's
are allocated a /24, /23, or /22 at a time........so maybe the largest
contigious block that have is a /22.
Redundancy is a cinch with BGP. If you are announcing all your netblocks
to both your upstreams, then you have incoming redundancy. If you are
taking full routes from both upstreams, or a combination of full routes
and or partial routes w/default, then you have the outgoing redundancy.
Using a little tuning is needed, prepending AS and fiddiling around with
various knobs until you get the balance just right.
>
> Maybe I don't need BGP? Maybe a floating static route might also work? Please
> explain and give sample code if possible.
You are paying both providers to take your traffic, so make them work for
their money. Run BGP and make sure all your netblocks can go across
either provider.
Who are your upstreams?
>
> Thanx in advance,
>
> Ken
>
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--
-----------------------------------------------------
Brian Feeny, CCNA [EMAIL PROTECTED]
318-222-2638 x 109 http://www.shreve.net/~signal
Network Administrator ShreveNet Inc. (ASN 11881)
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