S10512 snmp脱管

设备snmp脱管，查看设备debugging snmp有正常收发SNMP包，网管侧抓包看收发也正常

多次查看dis udp verbose，找到Creator: snmpd进程，对比Receiving buffer和Sending buffer看计数有增长，说明snmp报文有积压，怀疑是网管轮询交换机频率太高导致

Location: chassis 1 slot 6 cpu 0

Creator: snmpd[153202]

State: N/A

Options: SO_REUSEPORT

 Error: 0

Receiving buffer(cc/hiwat/lowat/drop/state): 42015 / 42240 / 1 / 89310318 / N/A

Sending buffer(cc/hiwat/lowat/state): 0 / 77 / 56 / N/A

Type: 2

Protocol: 17

Connection info: Src = 0.0.0.0:161, Dst = 0.0.0.0:0

Inpcb flags: INP_RECVDSTADDR INP_REUSEPORT INP_SYNCPCB

 Inpcb extflag: N/A

Inpcb vflag: INP_IPV4

 TTL: 255(minimum TTL: 0)

Send VRF: 0xffff

Receive VRF: 0xffff

降低网管访问交换机频率