It looks like you've defined vlan 3-4 per a line in your config, do you also need to specify vlan 1 on that line? I've had a problem before on a 6500 series before where I've defined a layer-3 VLAN with an IP address, but did not define the layer-2 component of it. I could not get communication going until I added in the new vlan to its layer-2 configuration.
It also may be worth the time to move everything off of the default VLAN 1 and onto another VLAN - especially if the asus router is capable of working with VLANs. I've personally found VLAN 1 problems much easier to troubleshoot and fix when I move it to another VLAN that isn't the default.
edit: idea 1 wasn't on a 6500 series judging by my current config - damn the foggy memory banks. Make sure VLAN 1 is active on the appropriate ports with a 'show vlan' command. Furthermore, check out the differences between ip default-gateway, ip default-network, and ip route commands here and make sure you are applying the correct form to your 4948.
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Is there a way to enable communication between the access and voice vlan on a single switchport on a 3750E running 15.0? New phones are talking up a layer-2 stack to their gateway, circling around to the workstations gateway, and then back down a L2 stack to the appropriate workstation. Is there a way to knock out this wacky and extensive L2 path I have going and just enable communication between the access and voice vlan on a per-switchport basis?
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