# SNMPTrap input garbage
**URL:** https://discuss.elastic.co/t/snmptrap-input-garbage/129318
**Category:** Logstash
**Created:** [April 24, 2018, 1:44pm UTC](https://discuss.elastic.co/t/snmptrap-input-garbage/129318 "2018-04-24T13:44:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@jasonyates](https://discuss.elastic.co/u/jasonyates)
#### Post date: [April 24, 2018, 1:44pm UTC](https://discuss.elastic.co/t/snmptrap-input-garbage/129318/1 "2018-04-24T13:44:07Z")
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.
"cldcClientMacAddress":"\u0000Æ\>,"
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.
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### Author:  [@jasonyates](https://discuss.elastic.co/u/jasonyates)
#### Post date: [May 2, 2018, 7:57am UTC](https://discuss.elastic.co/t/snmptrap-input-garbage/129318/2 "2018-05-02T07:57:32Z")
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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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 30, 2018, 7:57am UTC](https://discuss.elastic.co/t/snmptrap-input-garbage/129318/3 "2018-05-30T07:57:48Z")
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