Wireless Access

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Leo
Occasional Contributor II

Guest Network Issue

We have 3 wireless networks (one for production and two for guests) on each AP. We have 3 master controllers and 225 local controllers on different sites. The traffic from production one is drop to local production network and the traffic from two guest wireless go through tunnel from local controller to master controller. And then through firewall all the way go outside to Internet. Only HTTP and HTTPS are allowed on guests. Guest WLANs are totally separated from production. Guest WLANs are using captive portal for user login. Recently one of 225 sites reported that guest wireless is not working. Users can login captive portal without problems. The Internet browsing sometimes works and sometimes not or very slow. Most of time not working. I have rebuilt local controller and set MTU to 1500bytes but no luck.The guests networks are using the same configuration and firewall rules on all 225 sites but only this site is not working properly. Does anyone have the same experience? What else I need to check on local controller or master controller. Thanks

Guru Elite

Re: Guest Network Issue

you could try lowering the MTU to 1100



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Leo
Occasional Contributor II

Re: Guest Network Issue

Thanks, I'll try that

Leo
Occasional Contributor II

Re: Guest Network Issue

I tried to put in MTU 1100 but still no luck.

Leo
Occasional Contributor II

Re: Guest Network Issue

Also I replaced the local controller with a brand new one with the same config but nothing changed.

Guru Elite

Re: Guest Network Issue

Did you put the 1100 MTU in on both sides of the tunnel ?



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Leo
Occasional Contributor II

Re: Guest Network Issue

Hi cjoseph,

 

I just changed "SAP MTU" in AP system profile to 1500 for this site. I am new, could you please show me where/how to find the MTU for tunnel? we are using Aruba OS 5.0.3.

thank you,

Guru Elite

Re: Guest Network Issue

So the SAP MTU is the MTU for the access point.  Not there.

 

If you have a GRE tunnel it should be at the interface level of the tunnel:

 

interface tunnel 20

MTU 1100

 

 

 

Do that on both sides of the tunnel.



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Leo
Occasional Contributor II

Re: Guest Network Issue

I'll try to change tunnel MTU in next our next change window. I'll let you know how things going. Thank you so much.

By the way,  what is the default MTU for interface tunnel on Aruba controller?

thanks,

Leo
Occasional Contributor II

Re: Guest Network Issue

Problem was solved by adding the VLAN for this site to truested group on master controller. thanks,

 

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