This is going to be somewhat long and involved for what I suspect will be a quick answer, but I need to layout the situation.
I've recently statrted a new position with a much smaller company which is just coming out of a startup phase.
Unfortunately, they had their network built by a "systems integrator" who didn't give much thought to the future.
Basically, the core of the office network is two 2911/K9 routers with an SM-ES3-24-P module in them, giving 3 routed ports and 24 switch ports.
The SM-ES3-24-P module conencts to the router via an internal backplane link which presents as a pair of psuedo-1gig connections (only one of which is actually used in this configuration, for some reason), with some trunking configured on the router ports and a single, 1 gig link between the switch modules to give connectivity.
Unfortunately, there are also a cascaded Linksys switch hanging off one of the 100 meg ports on each switch module.
Herein lies the problem.
I have purchased an additional EHWIC module for each 2911 - an EHWIC-4ESG - and installed it, upgrqded the software to the point the router recognises the new ports and got a basic configuration for them.
However, I can NOT see any way short of physically connecting the SM module and the EHWIC to integrate the switch ports in the EHWIC into the existing fabric/VLAN configuration. The EHWIC also doesn't appear to support etherchannels, which is a bit disappointing.
I want to use the EHWIC to connect the two switche modules (freeing up the 1 gig on-board port), and to connect the Linksys switches into the fabric via a trunk
Does anyone know if there is ANY way to have the new 4 ports in the same fabric as the existing 24 (26, counting the virtual ones) ports from the SM module?
I've attached sanitised configurations from one of the routers and its associated switch module. The second router is essentially the same, just with different IP addresses.
The only way I can think to do this connection is as follows
G0/1, SM module -> G0/0/0, EHWIC.
G0/0/1, EHWIC -> second router
G0/0/2, EHWIC -> Linksys switch
G0/0/3, EHWIC -> Storage device which needs 1 gig
Thanks - I'm scratching my head on this one.