Sorry for the limited information. A little background. We were originally having a circuit issue and i wanted to swap from a 2610XM to with two single port WIC1 to a 2811 with a WIC2-1DSU because of some extension length issues. So this was the beginning of this testing phase, yet when we connected the 2811 with exact same config (except a controller vs. a service-module) we found that the Dell 5324 did not like the new router. So we attempted to adjust duplex and speed settings, yet auto auto is what currently is what both devises are set for (router and switch), but our local devices are still unable to reach resources across the WAN, yet from our router we can reach those same resources. So we troubleshot a little bit longer and found that the only device on the local segment that we can reach from the 2811 with we are connected to the Dell Switch is their local server (we couldnt not even ping the Dell switch but could telnet), and no other PC's. However when we connect the 2610XM to the Dell switch, again with the same configuration, we found that the local segment was able to access all needed WAN resources (though noted we were still unable to ping the switch from the 2610XM, but could telnet) This prompted we to quested the 2811 platform as a whole with compatability with the Dell series switches such as the on indicated above.