SR8810-X-S 某个物理接口子接口显示不出来流量

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客户当前想通过snmp实现监控子接口流量，7槽的2子卡显示不出来接口流量，3子卡可以，和硬件型号有关？

7       

   Sub2  MIC-GP10L-V2     Normal   

   Sub3  MIC-GP4L         Normal   

<SDJRW_R_S>dis int g7/2/1.450

GigabitEthernet7/2/1.450

Current state: UP

Line protocol state: UP

Description: To ZiBo_QiShangYinHang 10M

Bandwidth: 10240 kbps

Maximum transmission unit: 1500

Internet address: 9.56.59.157/30 (primary)

IP packet frame type: Ethernet II, hardware address: 9ce8-95c4-008a

IPv6 packet frame type: Ethernet II, hardware address: 9ce8-95c4-008a

Last clearing of counters: Never

没有后面的last 300等字样

<SDJRW_R_S>dis int g7/3/1.2

GigabitEthernet7/3/1.2

Current state: UP

Line protocol state: UP

Description: To JiNan_CaiZhengTing

Bandwidth: 100000 kbps

Maximum transmission unit: 1500

Internet address: 9.56.19.57/30 (primary)

IP packet frame type: Ethernet II, hardware address: 9ce8-95c4-008a

IPv6 packet frame type: Ethernet II, hardware address: 9ce8-95c4-008a

Last clearing of counters: Never

Last 300 seconds input rate: 3487.31 bytes/sec, 27898 bits/sec, 6.28 packets/sec

Last 300 seconds output rate: 3249.71 bytes/sec, 25997 bits/sec, 6.23 packets/sec

Input  (total): 357729319 packets, 122438544511 bytes

        (broadcasts) 5 packets, 340 bytes

        (multicasts) 0 packets, 0 bytes

        (unicasts)   357729314 packets, 122438544171 bytes

Output (total): 368420733 packets, 164872520076 bytes

        (broadcasts) 8 packets, 544 bytes

        (multicasts) 0 packets, 0 bytes

        (unicasts)   368420725 packets, 164872519532 bytes

有相关的流量的字样

两个子接口，对比配置发现多了个traffic-statistic enable

<SDJRW_R_S>dis cur int g7/3/1.2

#

interface GigabitEthernet7/3/1.2

description To JiNan_CaiZhengTing

traffic-statistic enable

ip address 9.56.19.57 255.255.255.252

qos apply policy NS70 inbound

 vlan-type dot1q vid 20

#

interface GigabitEthernet7/2/1.450

description To ZiBo_QiShangYinHang 10M

bandwidth 10240

ip address 9.56.59.157 255.255.255.252

qos apply policy NS70 inbound

 vlan-type dot1q vid 450

#

traffic-statistic enable

traffic-statistic enable命令用来开启以太网子接口的报文统计功能。

undo traffic-statistic enable命令用来关闭以太网子接口的报文统计功能。

开启traffic-statistic enable后可以统计到相关流量，实现监管