[168551] in North American Network Operators' Group
Re: BGP multihoming
daemon@ATHENA.MIT.EDU (Justin M. Streiner)
Wed Jan 29 15:45:41 2014
Date: Wed, 29 Jan 2014 12:25:55 -0500 (EST)
From: "Justin M. Streiner" <streiner@cluebyfour.org>
To: "nanog@nanog.org" <nanog@nanog.org>
In-Reply-To: <CAPkb-7AC0qATSDo+Xs73kGAmSurp6RNHjgiX=rTY3F0dUuRsxg@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Wed, 29 Jan 2014, Baldur Norddahl wrote:
> I had a customer ask if we could provide him with BGP such that he could be
> multihomed. He already has 128 IP addresses from another ISP. Obviously a
> /25 is a non go for multihoming as everyone are going to ignore his route.
Not necessarily everyone, but a lot of providers will filter that. More
headaches than it's worth.
> I would then need to help him with acquiring a /24 PI. Which appears to be
> impossible as RIPE does no longer assign PI space and PI can not be
> reassigned and thus be bought.
>
> Is assigning a /24 from my own PA space for the purpose of BGP multihoming
> considered sufficient "need"?
I haven't looked at RIPE policies in a while, but I would imagine that
assigning a customer a /24 of your space because they need to multihome is
considered a justifiable use.
> Could he get some PI from another region, such as ARIN? How does others
> handle this situation?
Most likely no, for two reasons. 1. Most RIRs don't assign IPv4 /24s to
end-users except in very special cases, 2. The smallest PI block they
would assign is usually something like a /21 or /22, so your customer
would need to be justifiably using that much space before they could apply
for a PI block, and 3, if the customer is in an area outside of $RIR's
service area, they would direct them to contact the appropriate RIR.
I also hope your customer is making plans for IPv6 deployment.
jms
