Strange practices?

Bill Fehring lists at
Mon Jun 7 21:35:38 UTC 2010

On Mon, Jun 7, 2010 at 13:50, 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 as well as if this would potentially create any problems by 2
> Autonomous Systems both originating the same prefix.
> Thanks
> -Bill

So if the enterprise loses connectivity to one of these two providers,
does the provider without working connectivity to the enterprise have
mechanism in place to cease originating the address space?


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