Pnni Format; Identifying Physical And Logical Elements - Cisco MGX 8850 Command Reference Manual

Chapter 5 PNNI Commands

PNNI Format

The PNNI controller requires the following format to identify a physical port:
[shelf.]slot[:subslot].port[:subport]
The PNNI physical port identifier (physical port ID) consists of a series of mandatory elements. Note
the period or colon associated with each element inside the square brackets. The elements of the physical
port ID are as follows:
•
•
•
•
•
For each physical port number, PNNI also generates a logical port number as an encrypted form of the
physical port number. The logical port number appears as an unformatted numerical string. For example,
a PNNI physical port ID may have the form 1:1.2:2, so the PNNI logical port number would be
16848898. Where needed, the descriptions in the PNNI command chapter define the need for this logical
port number. (This section does not define a PNNI logical port number, nor does it describe the
correspondence between an AXSM port and a PNNI logical port number.) For the correspondence
between a PNNI physical port and the port identifier on an AXSM, see
Table 5-2
PNNI port
Shelf
Slot
Subslot
Port
Subport
As Table 5-2
(or logical port) on an AXSM. An example of a PNNI physical port identifier is 1:2.1:1. This portid
corresponds to an AXSM, with the following particulars:
•
•
•
•
Release 2.0, Part Number 78-10467-04 Rev C0, October 2001
The shelf is always 1 for the current product and so is usually omitted.
The slot number of the front card.
Subslot is the number of the bay where the back card resides. This number is 1 or 2.
Port is the physical line.
Subport corresponds to the resource partition on the AXSM. For a UNI or NNI, this resource
partition is the same number as the logical port number (ifNum) on the AXSM. For a virtual
network-to-network interface (VNNI), the number does not directly correspond to the
Mapping PNNI Port ID to AXSM Elements
AXSM
N/A
Slot
Bay (for upper or lower back card)
Line
Logical interface (or port)
shows, a port to PNNI is a line on the AXSM, and a subport to PNNI is a logical interface
Slot 1
Bay 2
Line 1
Logical interface 1 (or logical port 1)

Identifying Physical and Logical Elements

Table
Cisco MGX 8850 Routing Switch Command Reference
5-2.
5-5