Pass VLAN Tags

[RadioX]

I have a cisco 3500 xl series switch. What I would like to do is pass vlan tags through it across my fiber link to my gateway. Here is a small exable

24 pt switch vlans on each port
uplink to the 3500
fiber across to my other switch
gateway

So i need the vlantag for port 1 vlan 101 to pass through the 3500 and not get stripped so it makes it to my gateway.

Is there a way to do this.

Thanks

 

[TreyJ]

Are all the switches and the gateway Cisco devices?

I could be wrong, but I believe the 3500XL only does Cisco ISL VLAN trunking. If your other switches are not Cisco, they will probably only do dot1.q trunking. This would make your request impossible to accomplish.

If the devices are all Cisco, you would set up VLAN trunking on the uplink ports, pruning out any unwanted VLANs.

Hope this helps!

 

[KiscoKid]

In a switched network, frame tagging is used to identify the VLAN that the packet belongs to. The tag is placed on
the frame as it enters the first switch it runs into. As long as the frame does not exit out a non-trunk port, the frame keeps the identifying tag. This enables each switch to see what VLAN the frame belongs to.

As such, if you want to retain the vlan tags right up to the gateway device, you will need to build a trunk port between that device and its locally attached switch.

Incidentally the 3500 does support dot1q trunking.