how to identify the type of Jammer/interference source

[kuan yang]

hi all,

im trying to identify the interference source but found no reference to type of Jammers. is there a reference?

Mon May 5 12:12:30 2014     AP US052TXPEA-ASL34[0] (64:e9:50:67:ae:90) Device ID: 0x5012, Type: Jammer[19], Severity: 64, Channels: 6, Cluster ID: 30:bf:e0:01:1a:ef, Previous Cluster ID: 30:bf:e0:01:1a:ef, Event: Set

thanks

[Rasika Nayanajith]

You need to have spectrum analyzer to detect those. Then by looking at the RF signature, you can find it is narrow band or wide band jammer.

Also you need to run RF spectrum analysis over time to see how frequent this is happening.

This may give some information on this

http://mrncciew.com/2014/10/17/cwap-spectrum-analysis/

HTH

Rasika

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[kuan yang]

thanks Rasika,

do "Device ID: 0x5012" or "Type: Jammer[19]" have any reference? or i have to config a monitor AP to see it, the log occure intermittently and random location, make it hard to sit with spectrum analyzer all day long.

[Rasika Nayanajith]

Does this thread related to your one. having same AP mac details ?

https://supportforums.cisco.com/discussion/12195341/wireless-mesh-losing-connectivity

Rasika

[kuan yang]

nope, it's not related to my issue, but my Ap report the same problem, happened to copy the same log message to this one.

[George Stefanick]

You really need to catch this with a spectrum analyzer to determine what it is. You can also put a clean air ap into spectrum mode and look at the signature that way ..

[kuan yang]

thanks George, so this Jammer 19 doesnt mean anything, yeah?

[George Stefanick]

Sorry it doesn't ring a bell. Also checked my notes . You could always open a Tac case and ask. 

[lperera03]

Kuan,

As you know, there is always some level of RF interference all around us. When it comes to mitigating RF interference if it becomes a real issue with clients not being able to work wirelessly, one needs to look at the type of business environment they are running, what type of businesses are around them and what sort of devices are being used in their environment itself to aid in troubleshooting. If you have cisco prime, you can easily check the duty cycle to get a good idea what type of jammer it might be. If you have 3600 APs, you can use the Cisco Spectrum Expert within Prime to launch Spectrum analyzer on that specific AP to see what is happening as well. In WLC you can take a look at clean air and interference devices to see what sort of interferers the APs are seeing. Hope this helps.