I have reviewed this document as part of the security directorate's  ongoing effort to review all IETF documents being processed by the 
IESG.  These comments were written primarily for the benefit of the security area directors.  Document editors and WG chairs should treat  these comments just like any other last call comments.

Summary: ready with nits.

This is a read-only MIB.  I didn't realize that until the end.  PLEASE put that in the abstract.  Perhaps replace "objects for managing networks" to "objects for monitoring networks"

Also the abstract talks about SNMPv2 and v1.  Why are those mentioned?  And why called out in the abstract as important?  Perhaps add "For backward compatibility," at the start of that last sentence.

The security considerations sections seem fine.
--  
Senior Architect, Akamai Technologies
IM: richsalz at jabber.at Twitter: RichSalz