Wireless Access

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MVP
Posts: 3,009
Registered: ‎10-25-2011

MTU size on controller

Im being asked to make the MTU system size lower in the controller

 

Anyone know how to do this?

 

I was looking around but i just saw how to change it but in the GRE Tunnel...

 

Cheers

Carlos

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Product Manager - Aruba Networks
Alternetworks Corp
MVP
Posts: 3,009
Registered: ‎10-25-2011

Re: MTU size on controller

Well the client just explained me better the issue they are facing

i guess this migh fix 

http://community.arubanetworks.com/t5/Controller-Based-WLANs/How-to-change-the-Maximum-Transfer-Unit-MTU-on-the-GRE-tunnel/ta-p/175990

 

Let see if it does 

 

Cheers

Carlos

----------------------------------------------------
Product Manager - Aruba Networks
Alternetworks Corp
Moderator
Posts: 321
Registered: ‎08-28-2009

Re: MTU size on controller

hi Carlos

For wireless client packets and the GRE tunnel you can use the sap mtu, the controller will automatically perform tcp mss adjustment based on the calculation of the sap mtu minus the overhead of the protocols in the tunnel (including the wlan encryption).  Confirm the current value with "show datapath tunnel".

 

The controller vlan interfaces also support MTU chaning if you are talking from a mangement perspective, they also support PMTUD - you shouldn't have to change them.

 

finally, the last place you can change MTU is if you are running PPPOE connection to the controller for management purposes, this is done via the vlan interface where PPPOE is setup, under ip pppoe-max-segment-size.

 

regards

-jeff

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