Strange practices?

Jen Linkova furry13 at
Wed Jun 9 04:44:10 UTC 2010


On Tue, Jun 8, 2010 at 6:50 AM, Dale Cornman <bstymied at> wrote:
> Has anyone ever heard of a multi-homed enterprise not running bgp with
> either of 2 providers, but instead, each provider statically routes a block
> to their common customer and also each originates this block in BGP?   One
> of the ISP's in this case owns the block and has even provided a letter of
> authorization to the other, allowing them to announce it in BGP as well.
>  I had personally never heard of this and am curious if this is a common
> practice

I have seen it quite often. It allows an enterprise to be multihomed
w/o getting PI or PA address space so they are usually pretty happy
with it.

>as well as if this would potentially create any problems by 2
> Autonomous Systems both originating the same prefix.

AFAIR  prefixes can be originated by more than one AS so there
shouldn't be any issues.

SY, Jen Linkova aka Furry

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