Use of FPC Numbers in Routing Matrix CLI Commands

A standalone T640 routing node can be configured with up to eight FPCs (numbered 0 through 7). Since a routing matrix can have up to four T640 routing nodes, and each T640 routing node has up to eight FPCs, the routing matrix as a whole can have up to 32 FPCs (0 through 31).

Table 6 shows the correspondence between the FPC hardware slot numbers in the T640 routing nodes and the FPC assignments recognized by the JUNOS software for a routing matrix.

Table 6: FPC Correspondence Between T640 Routing Nodes and the Routing Matrix

T640 Routing Node	T640 FPC Range	Routing Matrix FPC Range
LCC 0	0-7	0-7
LCC 1	0-7	8-15
LCC 2	0-7	16-23
LCC 3	0-7	24-31

The FPC slot numbers appear in two main ways in the CLI:

• In chassis (hardware-based) commands, such as the operational mode show chassis commands and the configuration mode [edit chassis] hierarchy level.
• When configuring or displaying information about interfaces, such as in the configuration mode [edit interfaces] hierarchy level and as part of the interface name in operational mode show interfaces commands.

Using FPC Numbers in Operational Mode Chassis Commands

You can specify the FPC slot number in operational mode chassis commands in two ways:

• Specify the number of the T640 routing node using the lcc number option and use a value from 0 through 7 for the FPC slot number.

This is the recommended method. The show command output also lists information in this way, sorted first by LCC number and then by FPC slot 0 through 7.

• Leave off the lcc number option and use a value from 0 through 31 for the FPC slot number.

For example, the following commands have the same result, but the first is the recommended usage:

user@host>request chassis fpc lcc 1 slot 1 offline
user@host>request chassis fpc slot 9 offline

Configuring FPC Numbers at the [edit chassis lcc number] Hierarchy Level

When configuring at the [edit chassis lcc number] hierarchy level, you must specify the LCC number and the actual FPC hardware slot number as labeled on the T640 routing node chassis (0 through 7). For more information, see the JUNOS System Basics Configuration Guide.

[edit chassis]

lcc lcc-number { 

    fpc slot-number { # Use the hardware FPC slot number

        pic pic-number {

            ...

        }

    }

}

Configuring Interfaces

When configuring interfaces (or specifying an interface name in show commands), you use the routing matrix FPC range of 0 through 31. For example, the 11 in t1-11/2/0 refers to FPC hardware slot 3 on LCC 1. For more information on configuring interfaces, refer to the JUNOS Network Interfaces and Class of Service Configuration Guide.