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Clarification required on Wireless Interference.


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#1 sandy2810

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Posted 06 January 2011 - 02:20 PM

Hi guys,

I am posting after ages..dont quite remember my last post..anyways we were having a debate related to wireless interference. Suppose there are 2 APs, one with SSID "Linksys" and the other with "Cisco". Both these APs are operating on the same channel. My opinion as to this scenario was...interference. As per my understanding if there are 2 AP with different SSID but operating on the same channel interference will coexist. My colleague had other opinion. According to him interference will occur only if the SSID's are also the same. Can someone throw some light on this please.

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#2 AjmalMhd

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Posted 26 January 2011 - 06:54 AM

thanks

#3 AjmalMhd

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Posted 26 January 2011 - 06:57 AM

View Postsandy2810, on 06 January 2011 - 02:20 PM, said:

Hi guys,

I am posting after ages..dont quite remember my last post..anyways we were having a debate related to wireless interference. Suppose there are 2 APs, one with SSID "Linksys" and the other with "Cisco". Both these APs are operating on the same channel. My opinion as to this scenario was...interference. As per my understanding if there are 2 AP with different SSID but operating on the same channel interference will coexist. My colleague had other opinion. According to him interference will occur only if the SSID's are also the same. Can someone throw some light on this please.

Regards
thanks

#4 officer50

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Posted 26 January 2011 - 01:54 PM

View Postsandy2810, on 06 January 2011 - 02:20 PM, said:

Hi guys,

I am posting after ages..dont quite remember my last post..anyways we were having a debate related to wireless interference. Suppose there are 2 APs, one with SSID "Linksys" and the other with "Cisco". Both these APs are operating on the same channel. My opinion as to this scenario was...interference. As per my understanding if there are 2 AP with different SSID but operating on the same channel interference will coexist. My colleague had other opinion. According to him interference will occur only if the SSID's are also the same. Can someone throw some light on this please.

Regards

Your colleague is right! There are three valid channels that, if used effectively will guard against inteference in your wireless network deployment, when using same SSID. These channels are 1, 6 and 11. So, as long as these channels are having different SSIDs, they will NEVER interfere with each other. Just think of an SSID as a VLAN, and remember memebers/clients on different VLANs do not communicate with each other, even if they are physically located side-by-side. SSIDs is a means of seggregation in wireless LAN technology.

I hope this helps.

#5 CyCoe

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Posted 02 February 2011 - 10:31 PM

Interference will happen! Not only from other WLAN-AP's even Microwaveovens and things like that use the 2,4 GHz Band.

Intresting article on this topic:

http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/ps9394/prod_white_paper0900aecd807395a9_ns736_Networking_Solutions_White_Paper.html

and 2,4 GHz WiFi offers 14 Channels as seen in following picture, so interference is not only happening between AP's on the same Channel (cause to the overlaps)

Posted Image

Edited by CyCoe, 02 February 2011 - 10:35 PM.

Posted Image

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#6 sandy2810

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Posted 03 February 2011 - 05:30 AM

View PostCyCoe, on 02 February 2011 - 10:31 PM, said:

Interference will happen! Not only from other WLAN-AP's even Microwaveovens and things like that use the 2,4 GHz Band.

Intresting article on this topic:

http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/ps9394/prod_white_paper0900aecd807395a9_ns736_Networking_Solutions_White_Paper.html

and 2,4 GHz WiFi offers 14 Channels as seen in following picture, so interference is not only happening between AP's on the same Channel (cause to the overlaps)

Posted Image

Thanks mate.
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#7 ezsalahu

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Posted 21 October 2015 - 10:39 PM

Interesting read.

#8 rokeus

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Posted 05 October 2016 - 08:51 AM

http://www.cisco.com/en/US/prod/collateral/wireless/ps9391/ps9393/ps9394/prod_white_paper0900aecd807395a9_ns736_Networking_Solutions_White_Paper.html
is not valid

#9 MarkRaats

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Posted 24 October 2016 - 01:13 PM

View Postrokeus, on 05 October 2016 - 08:51 AM, said:


What is not valid, be more specific about that comment please.
I didn't read the whole article yet, but what I read looks valid.




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