For monitoring there is show interfaces port-channel which verifies the EtherChannel configuration on the Cisco CMTS for the selected EtherChannel group. An example is here:

Router# show interfaces port-channel 1

Port-channel1 is up, line protocol is up

Hardware is FEChannel, address is 0000.0ca8.6220 (bia 0000.0000.0000)

MTU 1500 bytes, BW 400000 Kbit, DLY 100 usec, rely 255/255, load 1/255

Encapsulation ARPA, loopback not set, keepalive not set, fdx

ARP type: ARPA, ARP Timeout 04:00:00

No. of active members in this channel: 4

Member 0 : Fast Ethernet1/0/0

Member 1 : Fast Ethernet1/1/0

Member 2 : Fast Ethernet4/0/0

Member 3 : Fast Ethernet4/1/0

Last input 01:22:13, output never, output hang never

Last clearing of "show interface" counters never

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

223 packets input, 11462 bytes, 0 no buffer

Received 1 broadcasts, 0 runts, 0 giants

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

0 watchdog, 0 multicast

0 input packets with dribble condition detected

192 packets output, 13232 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out