Shepherd writeup

ISE write-up for: draft-zhou-pim-vrrp-06

  "This document introduces VRRP Aware PIM, a redundancy mechanism for
   the Protocol Independent Multicast (PIM) to interoperate with Virtual
   Router Redundancy Protocol (VRRP).  It allows PIM to track VRRP state
   and to preserve multicast traffic upon failover in a redundant
   network with virtual routing groups enabled.  The mechanism described
   in this document is based on Cisco IOS software implementation."

It was reviewed for me by Stig Venns and Adrian Farrel, its author
has made the changes discussed between them.

This draft has no IANA Considerations.

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