Installation guide

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Release Notes for Cisco uBR7200 Series for Cisco IOS Release 12.1 T
78-10643-04 Rev. B0
New and Changed Information
New Software Features in Release 12.1(3)T
The following new software features are supported by the Cisco uBR7200 Series Universal Broadband
Routers in Cisco IOS Release 12.1(3)T.
Circuit Interface Identification MIB
The Circuit Interface Identification MIB feature adds support for a new Cisco enterprise MIB, used to
assist in SNMP monitoring of circuit-based interfaces. The Circuit Interface MIB
(CISCO-CIRCUIT-INTERFACE-MIB) provides a MIB object that can be used to identify individual
circuit-based interfaces (for example, interfaces using ATM or Frame Relay). This user-specified
identification will then be returned when linkup and linkdown SNMP traps are generated for the
interface.
The Circuit Interface MIB consists of a single table, with each row being a sequence of two objects:
Circuit Interface Description (cciDescr) and Circuit Interface Status (cciStatus). The “cciDescr” object
is used to identify circuits using a textual description of up to 255 characters specified by the user (note
that MIB objects are modified using network management system [NMS] applications, and can not be
configured using the Cisco IOS command-line interface). When the row is created by a user, a value is
set for the cciDescr object. The table is indexed by “ifIndex” from the IF-MIB. The “cciStatus” is the
“RowStatus” object for the rows in the table. The “cciStatus” object can be set to only two values by
the user: “createAndGo(4)”, which creates a new row, and “destroy(6)”, which removes an existing row.
If the row is created successfully, the “cciStatus” will be active(1). When creating a new row, the user
should set the “cciDescr” object along with the “cciStatus” in a single snmp set pdu command. If the
row is already active, only the “cciDescr” object can be modified. The other option is to delete the row
first by setting the “cciStatus” to “destroy(6)” and then recreate the row with a new value for “cciDescr”.
When creating a new row, the” ifIndex” is validated first. If the “ifIndex” value is not valid, the row is
not created and an error code is returned. Similarly, when an interface is deleted and there was a
corresponding row in this table, that row will be deleted automatically.
After an identifying description is created for an interface by a user, the description (the “cciDescr”
object) will be sent along with the other varbinds as part of linkup and linkdown trap notifications.
For further details, see the CISCO-CIRCUIT-INTERFACE-MIB.my file.
Expression MIB Support of Delta, Wildcarding, and Aggregation
This feature adds support of the Delta, Wildcarding, Delta Wildcarding, and Aggregation features in the
Distributed Management Expression MIB (EXPRESSION-MIB) to Cisco IOS software for use by
SNMP.
The Delta function enables the Expression MIB to use Delta values of an object instead of absolute
values when evaluating an expression. Delta is obtained by taking the difference between the current
value of an object and its previous value.
The Wildcarding function of the Expression MIB allows evaluation of multiple instances of an object.
This is useful in cases where an expression needs to be applied to all instances of an object. The user
need not individually specify all instances of an object in the Expression but only has to set the
“expWildcardedObject” in “expObjectTable” to TRUE for the respective object.
Aggregation is performed using the sum function in the Expression MIB. The operand to the sum
function has to be a wildcard object. The result of the sum function is the sum of values of all instances
of the wildcard object.