Switching

does anyone know if Juniper EX switch support Cisco SSID Vlans?. thats mean we have many Wireless Cisco Bridge 1310 and want to create VLANs per SSID and route with Juniper EX.

 

 

Hi Victor,

 

If the Access Point/Bridge is configured to have a VLAN per SSID, then that should be invisible to the EX.  All the EX needs is for the bridge to send 802.1q tagged packets.  The EX must be configured to accept packets for each of the expected VLANs (AFAIK, it does not automatically accept packets for all VLANs on a trunk port).

 

So, just configure a trunk port on the EX with each of the VLAN tags you expect it to receive and everything will work just fine.

 

Rgds,

 

Guy 

I was working with this exact scenario today and got negative results.  The Cisco APs have two VLANs each.  I programmed a trunk port on the EX-4200 to carry the two VLANs and could no longer ping or communicate with the AP.  Does it matter if I use VLAN names vs VLAN ID numbers (I was using names on the Juniper switches)?

Hi Ariedel,

 

The name is merely a nice memorable tag for humans 🙂  The devices themselves speak only in numbers.

 

You will need to match the vlan-id (which should be a number) on both devices to ensure that the 802.1Q header in the Ethernet packets exchanged by the two devices are recognised as belonging to the right VLAN.

 

If the AP has VLAN 2 for SSID "office" and VLAN 3 for SSID "guest", then you must configure VLANs 2 and 3 on the EX port to which the AP is connected.

 

You may also need to configure a 'management' VLAN on the AP that is neither VLAN 2 or 3.

 

Rgds,

 

Guy 

It's also possible the AP is sending untagged packets for traffic to/from the management IP. In this case you'll need to configure the native VLAN on the port to match.

 

ie:

 

AP is IP 10.2.3.4 which is broadcast domain/VLAN-id 234, and VLAN-id 234 is a VLAN called MGMT.

 

set interface ge-n/n/n unit 0 family ethernet-switching native-vlan-id MGMT