| Description | This object indicates the IP interface for which
enforcement of a policy rule is requested or performed,
respectively.
The interface is identified by its index in the ifTable
(see IF-MIB in RFC 2863). If the object has a value of 0,
then no particular interface is indicated.
This object is used as input to a request for establishing
a policy rule as well as for indicating the properties of
an established policy rule.
If object midcomRuleOperStatus of the same entry has the
value newEntry(1) or setting(2), then this object can be
written by a manager in order to request its preference
concerning the interface at which it requests NAT service.
The default value of 0 indicates that the manager does not
have a preferred interface or does not have sufficient
topology information for specifying one. Writing to this
object in any state other than newEntry(1) or setting(2)
will always fail with an 'inconsistentValue' error.
Note that this error code is SNMP specific. If the MIB
module is used with other protocols than SNMP, errors with
similar semantics specific to those protocols should be
returned.
If object midcomRuleOperStatus of the same entry has the
value reserved(7) or enabled(8), then this object indicates
the interface at which NAT service for this rule is
performed. If NAT service is not required for enforcing
the policy rule, then the value of this object is 0. Also,
if the MIDCOM-MIB implementation cannot indicate an
interface, because it does not have this information or
because NAT service is not offered at a particular single
interface, then the value of the object is 0.
Note that the index of a particular interface in the
ifTable may change after a re-initialization of the
middlebox, for example, after adding another interface to
it. In such a case, the value of this object may change,
but the interface referred to by the MIDCOM-MIB MUST still
be the same. If, after a re-initialization of the
middlebox, the interface referred to before
re-initialization cannot be uniquely mapped anymore to a
particular entry in the ifTable, then the value of object
midcomRuleOperStatus of the same entry MUST be changed to
terminated(11).
If object midcomRuleOperStatus of the same entry has a
value other than newEntry(1), setting(2), reserved(7), or
enabled(8), then the value of this object is irrelevant. |