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multiplex VLANs over a single link

I have 5 switches and only one of them supports ISL trunking, all the others are 802.1Q. The firewall that the switches are hooked up to only supports 802.1Q. I need to get 5 VLANs to connect to one port on the firewall, how do you get this to happen? Please treat me like I know nothing and explain it in detail.

Hall of Fame Super Blue

Re: multiplex VLANs over a single link


We may need some more info before we can answer the question fully.

Do you want to have the Layer 3 interfaces for the vlans on the firewall ?, is this what you mean by 5 vlans connect to one port.

if so how are your vlans spread out across the switches.

In essence you will need to connect all your switches to each other via trunks and then have the firewall interface connect to one of those switches on a trunk interface ans then create your logical interfaces on the firewall.

However this may not be what you want. Could you be a bit more specific.

Oh and what type of firewall is it ?