About johnruffing

johnruffing · 12-02-2010

Is anyone aware of any guidelines from Cisco and/or observations in the field for 20Mhz (single-channel) 150Mbps 802.11n deployments and 40Mhz (dual-channel) 300Mbps deployments? Also, if they vary be freq. band (2.4 or 5.0 - not intending to do 40M...

johnruffing · 07-01-2008

So far, we have been told to continue to use the guidelines for 802.11b/g when designing for 802.11n.However, there are, no doubt, additional considerations that we will need to account for.For example:* If the coverage quality is increased with 802....

johnruffing · 12-18-2007

For what it's worth,I recently discovered that when you have multiple controllers and want to implement Mobility Groups, more is needed than simply entering the same Default Mobility Group Name for each controller within the mobility group. The foll...

johnruffing · 08-31-2007

We have encountered a number of issues with the WCS being out of synch with the WLC. The most recent has to do with the wrong firmware version being shown by the WCS after a code upgrade on the WLC. A number of access points (but not all) are shown...

johnruffing · 08-16-2007

When attempting to download 4.1.185.0 WLC code to the controller from the WCS, it fails with the following message:TRANSFER FAILEDApparently, this is due to the fact that the size of the image is now greater than 32MB. Although the updates to the WL...

johnruffing · 01-14-2011

Thank you Nicholas!That was EXACTLY what I was looking for.Can you post a link to the CUWSS Quick Reference guide?

johnruffing · 12-02-2010

The following post has the "short version" published by Cisco:https://supportforums.cisco.com/thread/2055709Please note that there are differences between data only and Wireless IP telephony:(Unfortunately, 54Mbps is the max. published data rate. I ...

johnruffing · 12-02-2010

To clarify, regarding SNR, I am looking for an updated table as shown below that includes higher 802.11n data rates for Data and Voice. Source:http://www.cisco.com/en/US/tech/tk722/tk809/technologies_q_and_a_item09186a00805e9a96.shtml#q26

johnruffing · 08-05-2009

According to Cisco:"As a guideline and starting point for site surveys, in a voice-ready WLAN, access points should be deployed at a density of approximately one every 3000 square feet, as opposed to one every 5000 square feet used for data-only netw...

johnruffing · 09-16-2008

Matthias:I believe that this is finally fixed in the newest release of 5.1.151.0(See the email from the 3rd-level Cisco TAC engineer)"I've upgraded to 5.1.151.0 in my lab and I am no longer seeing the false rogue messages."Hope his helps,John(Please ...

Member Since	‎11-14-2003 12:12 PM
Date Last Visited	‎08-18-2017 03:55 AM
Posts	275
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Looking for SNR guidelines for higher 802.11n (150Mbps and 300Mbps) data rates

Designing for 802.11n

Mobility Group Table MUST be populated in each WLC in same mobility group

Syncn issues between WCS and WLC - wrong AP version shown after upgrade

Upgrading to 4.1.185: tftp server on WCS has a 32MB limit: TRANSFER FAILED

Re: Looking for SNR guidelines for higher 802.11n (150Mbps and 3

Re: SNR and RSSI Values.

Re: Looking for SNR guidelines for higher 802.11n (150Mbps and 3

Re: Wireless Environment Sizing

Re: WLC v4.2.112.0 - IDS Signatures - Deauth/Auth and Assoc Floo