Subject: Comment on draft-mirtorabi-ospfv3-af-alt-00

From: Paul Wells <[email-masked]>
Date: Tue, 11 Nov 2003 09:55:20 -0600

I'd like to propose a minor change to the instance range values that this
draft uses to differentiate between address families.

Since the size of these ranges seems fairly arbitrary, I'd suggest that we
choose a power of two (say 32) rather than the current value of 20.  This
would change section 3 of the draft to:

   Instance ID # 0   -  # 31     IPv6 unicast AF
   Instance ID # 32  -  # 63     IPv6 multicast AF
   Instance ID # 64  -  # 95     IPv4 unicast AF
   Instance ID # 96  -  # 127     IPv4 multicast AF
   Instance ID # 128  -  # 255    Reserved

This seems more consistent with the way most protocol fields are defined,
and gives implementers the additional option of using bit-wise operators
when demuxing the incoming packets.

- Paul Wells