VLANs on the CSS and Traditional VLANs

[dwalsh]

Hello,

I'm just wondering if I can hook a gig port on my CSS11154 to a gig port on my 6509 (both with traditional GBICs) and create a trunk between the two that will make the VLANs in my regular VLAN domain accessible to the CSS? I'm pretty sure that I read that the VLANs in the CSS are 802.1q standard, but the documentation shows as connecting to another CSS, not a core switch.

Does this even make sense?

Thanks,

Dave

[Gilles Dufour]

the CSS supports 802.1q trunk.

You can therefore connect your Gig port to a cat6k and configure the port for trunking.

You will also have to configure manually all the vlans you want to use on the CSS.

Gilles.

[dwalsh]

Thanks for the reply.

So, if every circuit/vlan needs an IP address, and the vlan already has a routed interface (i.e. IP address) on the 6509, then do you still create one on the CSS?

Thanks,

Dave

[Gilles Dufour]

Dave,

depends what you want to do.

The CSS can work with only 1 vlan as long as it can reach clients and servers.

If you want something simple, configure a trunk between your CSS and the cat6k and add 1 vlan for client traffic and 1 vlan to reach the servers.

You will need 2 ip address [one per vlan] and 1 default gateway for the *client* vlan pointing at the MSFC.

If you have servers in multiple vlans, you can add the vlan to your trunk so the CSS can have access to those servers directly [you will need to add 1 ip address per vlan on the css] or you could simply access those servers by using a static and going through the Cat6k.

It is however important to make sure the response from the server goes through the CSS.

This discussion is not specific to the CSS [except that the returning traffic needs to come back to the CSS].

So use routing and switching knowledge to decide how to setup your CSS.

Gilles.