交换机S5120V2，版本V5的怎么看端口流量？

display interface serial 1/1/0:0

Serial1/1/0:0

Current state: DOWN

Line protocol state: DOWN

Description: Serial1/1/0:0 Interface

Bandwidth: 200000 kbps

Maximum transmission unit: 128

Hold timer: 10 seconds, retry times: 10

Derived from E1 1/1/0, Timeslot(s) Used: 1, Baudrate is 64000 bps

Internet address: 9.9.9.6/24 (Primary)

Link layer protocol: PPP

LCP: opened

Output queue - Urgent queuing: Size/Length/Discards 0/1024/0

Output queue - Protocol queuing: Size/Length/Discards 0/500/0

Output queue - FIFO queuing: Size/Length/Discards 0/75/0

Last clearing of counters: Never

Last 300 seconds input rate 0.00 bytes/sec, 0 bits/sec, 0.00 packets/sec

Last 300 seconds output rate 0.00 bytes/sec, 0 bits/sec, 0.00 packets/sec

    Input: 0 packets, 0 bytes, 0 no buffers

           8589934590 errors, 0 runts, 0 giants

           0 CRC, 4294967295 align errors, 0 overruns

           0 dribbles, 0 aborts, 4294967295 frame errors

    Output:0 packets, 0 bytes

           0 errors, 0 underruns, 0 aborts