Request for input from operators - identification of interfaces

During the final review phases of the review of
http://www.ietf.org/internet-drafts/draft-ietf-midcom-mib-09.txt the
issue described below surfaced. It is actually not completely new, it
was discussed in the past in a form or another, and it is not
necessarily specific to this document and MIB module only, but also to
other MIB modules. We believe that input from network operators can
help, and we solicit this input.

The MIDCOM-MIB defines tables containing firewall rules, indexed by
ifIndex. ifIndex values can change when interfaces are swapped or
devices reboot, and this could lead to rules being applied to the wrong
interface.

How do you, network operators, prefer interfaces be identified?=20
 - Is ifIndex the preferred choice even though the indices can change on
reboot?=20
 - Is ifName a better choice for identifying interfaces in rules, since
it is set by the device and remains fairly stable across reboots and is
guaranteed to be unique?=20
 - is ifAlias a better choice, since it can be set by operators,
although it is not guaranteed to be unique?

 We would appreciate inputs and thank you for your cooperation.

Dan


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