1. Network Management Specification
24
June 2004
8000-A2-GB30-30
Where:
-
R: Reserved for future use (Currently not used)
-
E: Extension number to accomodate future interfaces coexisting at the same level
of this scheme. Currently, only
bridge
interfaces are making use of this extension
number.
-
CC: Chassis number from 1..99. For the BAC, this value will always be 1,
identifying the 8820 or the 8620 chassis.
-
SS: Slot number from 1..99. For the BAC, this value will range from 1 through
20. In addition, the slots 0 and 99 are used as logical slots. Slot 0 will be used for
the active SCP and slot 99 will be used for the StandBy SCP.
-
L: Layer number associated in the interface stack in
Table 1-7, Interface Stack for
Management Ports
.
-
PPP: Port/Interface number from 1..999.
The following table shows the assigned ifIndexes to be used for the BAC product. In the
table, the DSL ports are enumerated from 1-48, with the Layer field set to 1. The product
will support 2 DSL Channels (Interleave, Fast) per DSL ports, that make a total of 96
channels numbered from 1-96 with the Layer field set to 2. Similarly, their corresponding
DSL ATM links will be numbered from 1-96, but with the Layer field set to 3. In the case
of the WAN ports, the number starts at 901 for the first T1/E1, DS3 or OC3 link and
increments up to the max number of WAN ports supported. When some of these DS1 are
aggregated to form an IMA Group, the first IMA group starts at 910, but with the Layer field
set to 4. Similarly, the ATM links associated with the DS1 port will carry the same starting
number as the physical interface but with the Layer Field set to 3, which corresponds to the
ATM layer in
Table 1-7, Interface Stack for Management Ports
. Finally, other ports
dedicated to management of the device such as Ethernet ports and async ports will have
ifIndexes starting at 801 for the first port, and so on.
The suffix ‘cc’ indicates the chassis number where the interface is instantiated. The chassis
number for the 8820 or the 8620 will be 1 for the BAC.
The suffix ‘ss’ indicates the slot number where the interface is instantiated. For the BAC,
this number corresponds to the physical position where the associated module is located in
the 8820 or 8620 chassis.
Table 1-10. Current assignments of the Extension digit of the ifIndex scheme:
Extension Number Assigned to
Example:
1
Bridge interfaces
101034005 --> Bridge interface for an ADSL port
5 n slot 03 in chassis 1.
