TX Matrix Router Chassis and Interface Names

The output from some CLI commands uses the terms SCC and scc (for switch-card chassis) to refer to the TX Matrix router. Similarly the terms LCC, and lcc as a prefix (for line-card chassis) refer to a T640 router in a routing matrix.

T640 routers are assigned LCC index numbers, 0 through 3, depending on the hardware setup of the routing matrix. A routing matrix can have up to four T640 routers, and each T640 router has up to eight FPCs. Therefore, the routing matrix can have up to 32 FPCs (0 through 31). The FPCs are configured at the [edit chassis lcc number] hierarchy level.

In the Junos OS CLI, an interface name has the following format:

type-fpc/pic/port

When you specify the FPC number, the Junos OS determines which T640 router contains the specified FPC based on the following assignment:

On LCC 0, FPC hardware slots 0 through 7 correspond to FPC software numbers 0 through 7.
On LCC 1, FPC hardware slots 0 through 7 correspond to FPC software numbers 8 through 15.
On LCC 2, FPC hardware slots 0 through 7 correspond to FPC software numbers 16 through 23.
On LCC 3, FPC hardware slots 0 through 7 correspond to FPC software numbers 24 through 31.

To convert FPC numbers in the T640 routers to the correct FPC in a routing matrix, use the conversion chart shown in Table 58. You can use the converted FPC number to configure the interfaces on the TX Matrix router in your routing matrix.

Table 58: T640 to Routing Matrix FPC Conversion Chart

FPC Numbering	T640 Routers
	LCC 0
T640 FPC Slots	0	1	2	3	4	5	6	7
Routing Matrix FPC Slots Equivalent	0	1	2	3	4	5	6	7
	LCC 1
T640 FPC Slots	0	1	2	3	4	5	6	7
Routing Matrix FPC Slots Equivalent	8	9	10	11	12	13	14	15
	LCC 2
T640 FPC Slots	0	1	2	3	4	5	6	7
Routing Matrix FPC Slots Equivalent	16	17	18	19	20	21	22	23
	LCC 3
T640 FPC Slots	0	1	2	3	4	5	6	7
Routing Matrix FPC Slots Equivalent	24	25	26	27	28	29	30	31

Some examples include:

In a routing matrix that contains lcc 0 through lcc 2, so-20/0/1 refers to FPC slot 4 of lcc 2.
If you have a Gigabit Ethernet interface installed in FPC slot 7, PIC slot 0, port 0 of T640 router LCC 3, you can configure this interface on the TX Matrix router by including the ge-31/0/0 statement at the [edit interfaces] hierarchy level.
[edit]interfaces {ge-31/0/0 {unit 0 {family inet {address ip-address;}}}}

TX Matrix Router Chassis and Interface Names

Related Topics