SNR periodically going to 0 in a warehouse environment

[tpahuja]

Folks,

          We just did a wireless refresh of our warehouse. We replaces 1242 access points with 3800 series access points. They are mounted at 40 feet with dipole antennas. We have set the Tx Power level to 3. Channel selection is being done by DCA. I am not sure why the SNR graph from Cisco Prime is showing that the SNR keeps going to zero periodically.

[Flavio Miranda]

Hi

 I wouldn't trust too much on Prime information. Ideally you could measure it using some different tool. 

  But, interference is able to cause SNR to decrease if noise floor is too high.

  You need a RF tool.

-If I helped you somehow, please, rate it as useful.-

[patoberli]

Sounds like you hit this bug: CSCve70752
https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html#anc17