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Input and Output direction on CEM interface.

What does mean by input packets and output packets on a CEM interface.

Which direction is the output. MPLS to SONET??

DEMA-M-NGN-PE-01#sh int cem 7/0/0

CEM7/0/0 is up, line protocol is up

  Hardware is Circuit Emulation Interface

  MTU 1500 bytes, BW 155520 Kbit/sec, DLY 0 usec,

     reliability 128/255, txload 1/255, rxload 13/255

  Encapsulation CEM, loopback not set

  Keepalive not supported

  Last input never, output never, output hang never

  Last clearing of "show interface" counters 01:38:00

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/0 (size/max)

  5 minute input rate 8192000 bits/sec, 4000 packets/sec

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

    23520010 packets input, 6021122560 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     23498829 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     0 packets output, 0 bytes, 0 underruns

     17624667 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

DEMA-M-NGN-PE-01#

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