Wireless Access

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Contributor II
Posts: 70
Registered: ‎05-01-2015

CAP Bridge Mode with forward mode Accsee

Hi Guys,

 

I found a interesting thing about CAP bridge mode with forward mode access.

 

When I set the forward mode into access, the AP still gives the clients' packets a 802.1q tag。

 

I think this is how the ap distinguish the packets, if not the AP would never know the packet is sent to the AP or the client.

 

Am I wrong?

Guru Elite
Posts: 8,637
Registered: ‎09-08-2010

Re: CAP Bridge Mode with forward mode Accsee

Many bridge mode deployments will have the AP and client traffic on different VLANs.


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Contributor II
Posts: 70
Registered: ‎05-01-2015

Re: CAP Bridge Mode with forward mode Accsee

I'm just curious.

I set the switchport mode into access, and set the vlan to the same vlan as the AP's.

I thought it would work, because the AP and the STA have the different MAC address, the AP should know how to distinguish the packet. But the fact is that all the packets from the STA AP always sets a 802.1q tag in the front and the 802.1q tag belongs to the AP's vlan.

Guru Elite
Posts: 8,637
Registered: ‎09-08-2010

Re: CAP Bridge Mode with forward mode Accsee

The switch side will strip dot1Q header on an access port.

Sent from Mail for Windows 10

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Contributor II
Posts: 70
Registered: ‎05-01-2015

Re: CAP Bridge Mode with forward mode Accsee

If the switch's port is set to access, then the switch will simply drop the packet with 802.1q tag.

Only trunk port will stip the 802.1q tag.

Guru Elite
Posts: 8,637
Registered: ‎09-08-2010

Re: CAP Bridge Mode with forward mode Accsee

What kind of switch? Cisco switches will accept tagged traffic on an access port as long as it’s the same VLAN ID as the access VLAN.

Sent from Mail for Windows 10

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Contributor II
Posts: 70
Registered: ‎05-01-2015

Re: CAP Bridge Mode with forward mode Accsee

S2500-48P MAS

Guru Elite
Posts: 8,637
Registered: ‎09-08-2010

Re: CAP Bridge Mode with forward mode Accsee

Can’t test this right now. If it is urgent, please contact Aruba TAC.

Sent from Mail for Windows 10

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Contributor II
Posts: 70
Registered: ‎05-01-2015

Re: CAP Bridge Mode with forward mode Accsee

I just want to understand the basic concept, and want to make sure what I did was right.

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