Interface Naming for a Routing Matrix
A routing matrix is a multichassis architecture composed of one TX Matrix platform, to which you can connect from one to four T640 routing nodes, as shown in Figure 1.
A TX Matrix platform is also referred to as a switch-card chassis (SCC). The CLI uses scc to refer to the TX Matrix platform. A T640 routing node in a routing matrix is also referred to as a line-card chassis (LCC). The CLI uses lcc as a prefix to refer to a specific T640 routing node.
LCCs are assigned numbers, 0 through 3, depending on the hardware setup and connectivity to the TX Matrix platform. For more information, see the TX Matrix Platform Hardware Guide. A routing matrix can have up to four T640 routing nodes, and each T640 routing node has up to eight FPCs. Therefore, the routing matrix as a whole can have up to 32 FPCs (0 through 31).
In the JUNOS CLI, an interface name has the following format:
type-fpc/pic/port
When you specify the fpc number, the JUNOS software determines which T640 routing node contains the specified FPC based on the following assignment:
- On LCC 0, FPC hardware slots 0 through 7 are configured as 0 through 7.
- On LCC 1, FPC hardware slots 0 through 7 are configured as 8 through 15.
- On LCC 2, FPC hardware slots 0 through 7 are configured as 16 through 23.
- On LCC 3, FPC hardware slots 0 through 7 are configured as 24 through 31.
For example, the 1 in se-1/0/0 refers to FPC hardware slot 1 on the T640 routing node labeled lcc0. The 11 in t1-11/2/0 refers to FPC hardware slot 3 on the T640 routing node labeled lcc1. The 20 in so-20/0/1 refers to FPC hardware slot 4 on the T640 routing node labeled lcc2. The 31 in t3-31/1/0 refers to FPC hardware slot 7 on the T640 routing node labeled lcc3.
Table 6 summarizes the FPC numbering for a routing matrix.
Table 7 lists each FPC hardware slot and the corresponding configuration numbers for LCCs 0 through 3.