[178123] in North American Network Operators' Group
Re: Interesting BFD discussion on reddit
daemon@ATHENA.MIT.EDU (Saku Ytti)
Tue Feb 17 02:36:14 2015
X-Original-To: nanog@nanog.org
Date: Tue, 17 Feb 2015 09:36:06 +0200
From: Saku Ytti <saku@ytti.fi>
To: nanog@nanog.org
In-Reply-To: <8661b1725e.fsf@valhalla.seastrom.com>
Errors-To: nanog-bounces@nanog.org
On (2015-02-16 20:33 -0500), Rob Seastrom wrote:
Hey,
> One might profitably ask why BFD wasn't designed to take advantage of
> high-TTL-shadowing, a la draft-gill-btsh.
RFC5881, section 5 in page 4
---
If BFD authentication is not in use on a session, all BFD Control
packets for the session MUST be sent with a Time to Live (TTL) or Hop
Limit value of 255. All received BFD Control packets that are
demultiplexed to the session MUST be discarded if the received TTL or
Hop Limit is not equal to 255. A discussion of this mechanism can be
found in [GTSM].
---
--
++ytti
