SNMPTrap input garbage

I appear to have issues with receiving MAC addresses via SNMP Trap from a Cisco WLC, they end up as garbage in the resulting JSON.


I have verified several things based on similar posts

  • The MAC address is valid in the tcpdump
  • I'm running the latest version of logstash that fixed a similar issue
  • I've tried both queuing methods (memory and persisted)
  • I've set codec => plain & charset => ASCII-8BIT

Any help would be greatly appreciated.

Has nobody else seen this before? I've read the forum top to bottom and no existing suggestions appear to fix this.

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