Subject: [Mip4] draft-mip4-gre-key-extension-00.txt

From: "Kent Leung (kleung)" <[email-masked]>
Date: Mon, 9 Nov 2009 23:18:01 -0800

This is not backwards compatible with RFC 3344 which supports GRE
tunneling, which is established by setting the G bit w/o GRE Key
Extension.

   "If the HA receives a Registration Request with the 'G' bit set but
   without the GRE Key Extension, it SHALL send an RRP with code 'Poorly
   Formed Request (0xY2)'."

Kent