[141984] in North American Network Operators' Group

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Re: Consequences of BGP Peering with Private Addresses

daemon@ATHENA.MIT.EDU (Nick Hilliard)
Wed Jun 15 12:56:14 2011

X-Envelope-To: nanog@nanog.org
Date: Wed, 15 Jun 2011 17:54:41 +0100
From: Nick Hilliard <nick@foobar.org>
To: James Grace <james@cs.fiu.edu>
In-Reply-To: <4522CE80-08B1-4310-B86F-9CAEA09DCB0E@cs.fiu.edu>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

On 15/06/2011 17:47, James Grace wrote:
> So we're running out of peering space in our /24 and we were considering
> using private /30's for new peerings.  Are there any horrific
> consequences to picking up this practice?

yes. it causes nasty problems if you use urpf (as you should), in 
particular with pmtu discovery and traceroute.

Nick



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