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Occasional Contributor II
Posts: 16
Registered: ‎03-15-2011

What happens if a VLAN is defined on a vap that is set to bridge mode?

[ Edited ]

What happens if a VLAN is defined on a vap that is set to bridge mode?  We're running the exact same hardware & aos and we see some strange behaviour at times, including clients who go from a full strength signal to nothing, APs that we constantly have to re-boot to accept clients again, and other random connection problems for clients.

 

 

Guru Elite
Posts: 20,994
Registered: ‎03-29-2007

Re: What happens if a VLAN is defined on a vap that is set to bridge mode?


dfw75080 wrote:

What happens if a VLAN is defined on a vap that is set to bridge mode?  We're running the exact same hardware & aos and we see some strange behaviour at times, including clients who go from a full strength signal to nothing, APs that we constantly have to re-boot to accept clients again, and other random connection problems for clients.

 

 


If a VLAN is defined on a VAP, if it is NOT the Native VLAN ID paramater in the AP system profile, it will q-tag  (802.1q) the bridged traffic.  If the switch that the AP is connected to is a trunk and is bridging traffic for the q-tagged VLAN, it will pass it to that VLAN locally.

 

Your problem as stated is not directly related to bridge mode.  Maybe you want to provide more details, or open a support case.



Colin Joseph
Aruba Customer Engineering

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Occasional Contributor II
Posts: 16
Registered: ‎03-15-2011

Re: What happens if a VLAN is defined on a vap that is set to bridge mode?

Thanks Collin - this makes sense & it may actually be part of our issue.  The switches at our remote sites have 2 vlans configured, vlan 3 for data and vlan 4 for wireless.  The vlan 4 ports are access ports, but the vap is set to vlan 1, which we have shutdown in the switch.

 

I'm going to make the change at my trouble sites first, which are all in the same AP group and are running the configuration as described above.

Guru Elite
Posts: 20,994
Registered: ‎03-29-2007

Re: What happens if a VLAN is defined on a vap that is set to bridge mode?

Hold on now.  The Vlan in the VAP only has to match the Native VLAN ID parameter in the AP system profile, which by default is 1.  So if you have Vlan 1 in the VAP and didn't edit the AP system profile (you would know if you did), you should be good.  The VAP vlan and the Native Vlan ID, when they match bridge the traffic without trunking, irrespective of what the switch the AP is connected to has configured.  If the VAP vlan nd the Native VLAN ID do NOT match, then clients are tagged with the VLAN in the VAP.

 

Does that make sense?

 



Colin Joseph
Aruba Customer Engineering

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

Occasional Contributor II
Posts: 16
Registered: ‎03-15-2011

Re: What happens if a VLAN is defined on a vap that is set to bridge mode?

Yes, it makes sense now.  I missed the line in your reply 'in the AP system profile'.  They are both set to 1. 

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