BGP Homing Question

Fri Aug 27 15:16:40 UTC 2004

On Aug 27, 2004, at 8:58 AM, Joe Abley wrote:

> On 27 Aug 2004, at 08:13, Rick Lowery wrote:

>> I know they would not be good Internet citizen, but if they needed to 
>> do this for a temp basis does anyone see an issue?
>
> There's not much bad citizenry in what you are suggesting: the 
> assigning-RIR problem is a non-problem, and your two sites are still 
> only going to originate one prefix each (which they would presumably 
> do even if you had a separate LIR assignment for the European node).

There is zero "bad citizenry" in this, and don't let anyone tell you 
differently.  It is your netblock, you get to use it as needed.  This 
is much better than getting another /20 for an EU site that only needs 
a /24.

Also, filtering will not be an issue, if you are careful.  Anyone who 
does not hear the /24 will hear the /20.  Packets for the /24 will go 
to your US upstream.  As long as your US upstream peers with your EU 
upstream, and does not filter the /24 being announced over that peering 
link, they will send the bits where they belong.  Since this is much 
more common than the alternative, you will likely have full 
connectivity.

Anyone knows who filters these days?  Sprint stopped when Sean left.  
Verio stopped when Randy left.  I don't know anyone beating that drum 
any more.  (Kinda nice, actually.)  I've heard some Asian ISPs do, but 
don't remember who.

-- 
TTFN,
patrick