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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 platform. Similarly the terms LCC, and lcc as a prefix (for line-card chassis) refer to a T640 routing node in a routing matrix.

T640 routing noticed are assigned LCC index numbers, 0 through 3, depending on the hardware setup to the TX Matrix platform. 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 can have up to 32 FPCs (0 through 31). The FPCs are configured at the [edit chassis lcc number] hierarchy level.

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 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 routing nodes to the correct FPC in a routing matrix, use the conversion chart shown in Table 55. You can use the converted FPC number to configure the interfaces on the TX Matrix platform in your routing matrix.

Table 55: T640 to Routing Matrix FPC Conversion Chart

FPC Numbering	T640 Routing Nodes
	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 routing node LCC 3, you can configure this interface on the TX Matrix platform 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; } } } }

For more information about the interface-naming conventions for a routing matrix, see the JUNOS Network Interfaces Configuration Guide.

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