Paradyne 8820, 8620 manual Interface indexes ifIndex, 2. ifIndex Scheme

1. Network Management Specification

4.1.1.1.1Interface indexes (ifIndex).

A unique value, greater than zero number will be assigned to each interface. The following ifIndex scheme was developed by a committee to solve a general stack hierarchy and it is shown in Figure 1-2:

R R C C S S L P

P P

Figure 1-2. ifIndex Scheme

Where:

-RR: Reserved for future use.

-CC: Chassis number from 1..99. For the GranDSLAM 3.0, this value will always be 1, identifying the 8820 or the 8620 chassis.

-SS: Slot number from 1..99. For the GranDSLAM 3.0, this value will range from 1 through 20.

-Slot 00 will have a special meaning on the GranDSLAM 3.0. Slot 00 will be used for the interfaces contained in the SCP cards.

-L: Layer number associated in the interface stack in Table 1-7, Interface Stack.

-PPP: Port/Interface number from 1..999.

The value 0 will be used as a special case in any of the above fields to denote N/A.

The following table shows the assigned ifIndexes to be used for the GranDSLAM 3.0 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/E1or 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. 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 GranDSLAM 3.0.

The suffix ‘ss’ indicates the slot number where the interface is instantiated. For the GranDSLAM 3.0, this number corresponds to the physical position where the associated module is located in the 8820 or 8620 chassis.

For the GranDSLAM 3.0, the value ss=’00’ have a special meaning. A logical slot number of 00 will be used for those interfaces contained and accessible in the SCP cards. Therefore, these interfaces will be independent and remain contant regardless of which SCP is in charge. However, the internal software may require that the corresponding slot based ifIndexes in the SCP be also supported.

20 June 2003 8000-A2-GB30-00