There are a variety of other useful commands you can use when maintaining a routing matrix.
user@router> show chassis location fpc
Global FPC LCC Local FPC
1 0 1
2 0 2
3 0 3
16 2 0
17 2 1
19 2 3
LCC0_SIB-L0_F0,03->SIB-S0_F0,00 UP LCC1_SIB-L0_F0,03->SIB-S0_F0,01 RESET LCC2_SIB-L0_F0,03->SIB-S0_F0,02 UP LCC3_SIB-L0_F0,03->SIB-S0_F0,03 RESET
user@router> show chassis ethernet-switch
scc-re0: -------------------------------------------------------------------------- Link is good on FE port 4 connected to device: LCC0 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 6 connected to device: LCC2 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 8 connected to device: SPMB Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on GE port 13 connected to device: Other RE Speed is 1000Mb Duplex is full Autonegotiate is Enabled lcc0-re0: -------------------------------------------------------------------------- Link is good on FE port 1 connected to device: FPC1 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 2 connected to device: FPC2 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 3 connected to device: FPC3 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 8 connected to device: SPMB Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 10 connected to device: SCC Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on GE port 13 connected to device: Other RE Speed is 100Mb Duplex is full Autonegotiate is Enabled lcc2-re0: -------------------------------------------------------------------------- Link is good on FE port 0 connected to device: FPC0 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 1 connected to device: FPC1 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 3 connected to device: FPC3 Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 8 connected to device: SPMB Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on FE port 10 connected to device: SCC Speed is 100Mb Duplex is full Autonegotiate is Enabled Link is good on GE port 13 connected to device: Other RE Speed is 100Mb Duplex is full Autonegotiate is Enabled