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Status: Held for Document Update (1)

RFC 5847, "Heartbeat Mechanism for Proxy Mobile IPv6", June 2010

Errata ID: 2302
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Hoenes
Date Reported: 2010-06-15
Held for Document Update by: Brian Haberman

Section 3.1, pg. 5 says:

   A PMIPv6 node (MAG or LMA) matches every received Heartbeat Response
   to the Heartbeat Request sent using the sequence number.  Before
   sending the next Heartbeat Request, it increments a local variable
<< page break >>
|  MISSING_HEARTBEAT if it has not received a Heartbeat Response for the
|  previous request.  When this local variable MISSING_HEARTBEAT exceeds
   a configurable parameter MISSING_HEARTBEATS_ALLOWED, the PMIPv6 node
   concludes that the peer PMIPv6 node is not reachable.  If a Heartbeat
!  Response message is received, the MISSING_HEARTBEATS counter is
   reset.

It should say:

   A PMIPv6 node (MAG or LMA) matches every received Heartbeat Response
   to the Heartbeat Request sent using the sequence number.  Before
   sending the next Heartbeat Request, it increments a local variable
|  MISSING_HEARTBEATS if it has not received a Heartbeat Response for 
|  the previous request.  When this local variable MISSING_HEARTBEATS 
   exceeds a configurable parameter MISSING_HEARTBEATS_ALLOWED, the
   PMIPv6 node concludes that the peer PMIPv6 node is not reachable.
   If a Heartbeat Response message is received, the MISSING_HEARTBEATS
   counter is reset.

Notes:

Rationale:
The RFC text varies between singular and plural form of the name
of the local variable. A single name is necessary for consistency.
Paraphrasing from MIB doctor guidelines, counter variables should
always be in plural form. Additionally, the related configurable
parameter is called "MISSING_HEARTBEATS_ALLOWED " in the RFC.
Therefore, "MISSING_HEARTBEATS" is chosen above as the appropriate
form and the instances of "MISSING_HEARTBEAT" are changed to the
plural form.

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