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Routing VLANs between Catalyst switches

Hi all,

I've got two Catalyst 3560 switches in a basic configuration linked by fiber. I now want to designate a port on each switch to a separate vlan other than the default. How would I designate a vlan for the respective ports on the switches and how would I setup the GBIC ports (fiber) to route both (default & new vlan) VLANs?

Thanks!
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kangsoh
Asked:
kangsoh
1 Solution
 
bmancheeCommented:
kangsoh,
setting up the ports for separate vlans is rather simple:

In interface config mode ("config t", then "int <name>" for the interface you want to configure), enter the following command: "switchport access vlan <x>" where x is the vlan you want to assign that port to.

For the fiber interface that link the 2 switches, issue a "switchport mode dynamic desirable" which ensures that the 2 ports initiate a vlan trunking link between themselves.  Keep in mind that the switches at this point are not "routing" traffic between vlans, but rather switching packets between switches within each configured vlan.

To enable the routing, issue the "ip routing" command one one of your switches.  This turns on the routing function on the switch if it is not already enabled.  This switch will now act as the "router" between your vlans.  Now you need to configure VLAN interfaces.  If you are familiar with working with router interfaces, this isn't that complicated.  To enter interface config for a vlan interface, from config mode, type "int vlan <number>", where number is the same as one of the vlans.  This creates the vlan interface and allows you to configure it.  Assign it an IP address.  That's about it.  Do again for each vlan you have already configured.  The switch should now be able to route between vlans.

If you have any more questions, please follow up.

Thansk,
Bert
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