Wireless Access

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Frequent Contributor I
Posts: 63
Registered: ‎03-17-2016

are broadcasts clients see from the other clients or the controller?

I may be asking the most newb question here, but let's say I ran a wireshark capture on a wifi interface and was connected to an SSID many other users use.

 

I see numerous broadcast packets from other clients.  Several thousand per minute, in fact.  Are these broadcasts actually from the clients, ie. a person in the cubicle next to me sends a broadcast and I pick it up, or is it sent to the controller first?

Does the controller re-broadcast these packets? (My belief this is the case) If so, what kind of impact does this have on controller/ap/wireless performance?

Would enabling "Drop Broadcast and Unknown Multicast Traffic" feature under VAP help increase performance?

 

Thank you for any input.  I know it is a relatively newb question to ask, but I'd like to know the way packets like these are processed.

Wireless newb
Guru Elite
Posts: 20,820
Registered: ‎03-29-2007

Re: are broadcasts clients see from the other clients or the controller?

Broadcasts are from wired and wireless clients. The controller replicates broadcasts to every access point that has a user on the vlan with the broadcasts.

Turning on drop broadcast and multicast will increase performance, yes.


Colin Joseph
Aruba Customer Engineering

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