Paradyne Broadband Access Concentrator 8820 User Manual

Page of 108
1. Network Management Specification
20
 
 June 2003
8000-A2-GB30-00
4.1.1.1.1
Interface 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.
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 
-
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 
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.
P
P
P
L
S
S
C
C
R
R