[DR] actually RFC 4181 discourages the practice
of placing MIB modules under a subtree other than mib-2. See section
4.5:
- The value assigned to the
MODULE-IDENTITY descriptor MUST be unique
and
(for IETF standards-track MIB modules) SHOULD reside under
the
mgmt subtree [RFC2578]. Most often
it will be an IANA-assigned
value directly
under mib-2 [RFC2578], although for
media-specific
MIB modules that extend the
IF-MIB [RFC2863] it is customary to use
an
IANA-assigned value under transmission [RFC2578]. In the
past,
some IETF working groups have made their
own assignments from
subtrees delegated to
them by IANA, but that practice has proven
problematic and is NOT
RECOMMENDED.