SR6608子卡硬件故障导致接口计数异常问题经验案例

SR6608设备，线卡FIP240，子卡HIM-1EXP。

设备接口流量计数异常大，且无法清空，该接口直连不通、学不到arp。

该线卡上另一个接口计数及清除计数都正常。

Ten-GigabitEthernet2/2/0 current state: DOWN ( Administratively )

……

Output queue : (Urgent queuing : Size/Length/Discards)  0/100/0

Output queue : (Protocol queuing : Size/Length/Discards)  0/500/0

Output queue : (FIFO queuing : Size/Length/Discards)  0/1024/0

Ethernet port mode: LAN

Last clearing of counters: 09:22:25  Tue 10/30/2018

    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: 25332747903958950 packets, 8444249301319650 bytes, 0 no buffers

           8444249301319650 broadcasts, 8444249301319650 multicasts, 4294967265 pauses

           4294967172 errors, 4294967265 runts, 4294967265 giants

           4294967265 crc, 0 align errors, 0 overruns

           0 dribbles, 4294967265 drops

    Output:25332747903958950 packets, 8444249301319650 bytes

           8444249301319650 broadcasts, 8444249301319650 multicasts, 4294967265 pauses

           0 errors, 0 underruns, 0 collisions

           0 deferred, 0 lost carriers

reset counters interface ten 2/2/0

dis int Ten-GigabitEthernet 2/2/0

Ten-GigabitEthernet2/2/0 current state: DOWN ( Administratively )

……

    Input: 844424930131965 packets, 281474976710655 bytes, 0 no buffers

           281474976710655 broadcasts, 281474976710655 multicasts, 4294967294 pauses

           4294967288 errors, 4294967294 runts, 4294967294 giants

           4294967294 crc, 0 align errors, 0 overruns

           0 dribbles, 4294967294 drops

    Output:844424930131965 packets, 281474976710655 bytes

           281474976710655 broadcasts, 281474976710655 multicasts, 4294967294 pauses

           0 errors, 0 underruns, 0 collisions

           0 deferred, 0 lost carriers

该接口XG2/2/0所在子卡硬件异常，display interface时，设备获取的都是无效的值，因此清空计数也没有生效。

硬件问题，更换子卡解决