Trunking to Linksys

[gdwingnuts]

I am attempting to trunk between a Cisco 4948 Catalyst and a Cisco Linksys (8 port SRW2008 10/100/1000 Gigabit Switch).  I have the commands for the 4948 but I am missing something on the Linksys.  My Cisco 4948 commands are:

#switchport trunk encapsulation dot1q

#switchport trunk allowed vlan 10,100

#switchport mode trunk

I am using the web interface to configure the Cisco Linksys and have chosen Trunk for port #8.  Am I missing another configuration?  When I configure the Cisco 4948 the trunk shuts down.  Your guidance is appreciated.

Thanks

~c

[cadet alain]

Hi,

Have you created your VLANs on the linksys?

Regards.

Alain.

[gdwingnuts]

I have yet to create my VLANs on the Linksys.  The linksys is currently running the default VLAN1.  Question, if the VLANs I want access on the other switch are VLAN10 and VLAN30, and my trunk connects physically to VLAN10 on the Cisco 4948, do I need to create both VLANs on the Linksys or just the one I am trunked to?  My whole objective is to have all machines that are connected to the Linksys have access to VLAN10 and VLAN30 on the other switch.

Thank you,

~c

[cadet alain]

Hi,

A trunk in Cisco lingo is a link which can transport multiple VLANs(by tagging them) compared to an access port which supports only

1 VLAN.

So you must have the same VLANs on the 2 switches otherwise you'll have to do routing with an external router or on the L3 switch.

Regards.

Alain.

[gdwingnuts]

I only have four machines on the Linksys that need access to the two VLANs on the 4948.  I guess what I'm asking is can these 4 machines be a member of one VLAN on the Linksys and gain access to both VLANs on the 4948?  Thanks for th quick reply.

~c

[cadet alain]

Yes if you do intervlan routing for communication of 1 vlan to another vlan.

so if you have vlan 10 and 11 on 4948 and on linksys only vlan10 then vlan10 to vlan10 is ok but vlan10 to vlan 11 must be routed.

Regards.

Alain.

[gdwingnuts]

OK you've been very helpful!  Last question...I hope...Can a port on the Linksys belong to two VLANs thus eliminating the need for Inter-VLAN routing on the 4948.  Once again thank you.

~c

[cadet alain]

Can a port on the Linksys belong to two VLANs thus eliminating the need for Inter-VLAN routing on the 4948.

No if you connect a port to a host it is an access port so 1 VLAN, the only ports belonging to more than 1 VLAN are trunk ports(tagged ports).

Regards.

Alain.