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SNMP MSTP TRAP reason

Hi Folks,

We have catalyst 3850

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 56 WS-C3850-48P 03.07.05E cat3k_caa-universalk9 INSTALL

 

and we have enabled SNMP spanning tree traps

config:

spanning-tree mode mst
spanning-tree mst configuration
spanning-tree mst 70,100 priority 0
snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart

 

 

We get below SNMP TRAPS and not able to understand what does these traps mean.

2020-10-03 19:21:41 switch.host.abcd.localdomain [x.x.x.x] (via UDP: [x.x.x.x]:1028->[x.x.x.y) TRAP, SNMP v1, community abcd

        SNMPv2-SMI::mib-2.17 Enterprise Specific Trap (2) Uptime: 14 days, 2:16:23.54

        SNMPv2-SMI::enterprises.9.9.82.1.11.4.1.1.70 = INTEGER: 70      IF-MIB::ifName.63 = STRING: Te1/1/4

 

2020-10-03 19:21:41 switch.host.abcd.localdomain [x.x.x.x] (via UDP: [x.x.x.x]:1027->[x.x.x.y]) TRAP, SNMP v1, community abcd

        SNMPv2-SMI::mib-2.17 Enterprise Specific Trap (2) Uptime: 14 days, 4:23:15.98

        SNMPv2-SMI::enterprises.9.9.82.1.11.4.1.1.70 = INTEGER: 70      IF-MIB::ifName.62 = STRING: Te1/1/3

 

 

I found that    SNMPv2-SMI::enterprises.9.9.82.1.11.4.1.1.70    =   1.3.6.1.4.1.9.9.82.1.14.5.1.1.70

which is MST instance 70 and it points to stpxMSTInstanceIndex and it defines this:

 

"An integer that uniquely identifies an MST instance within the range of 0 to the object value of stpxMSTMaxInstanceNumber. This object is deprecated and replaced by stpxSMSTInstanceIndex"

 

The above description is not clear, is it reporting port state change happened on MST instance 70 leading to tree convergence ?

 

But what exactly does it convey? 

1) Does it mean instance 70 has some problem? or

2) Is it just reporting instance 70 has port Te1/1/4 on msw2 and port Te1/1/3 on msw4 ?

 

 

 

 

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