Interesting BFD discussion on reddit

Saku Ytti saku at ytti.fi
Tue Feb 17 07:36:06 UTC 2015


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



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