We are trying to wake workstations in our network on a different subnet by
right-clicking the object and selecting Actions > Remote Wakeup. The
message box comes up saying the packet has been sent up the workstation
never wakes up. If we send the packet from another workstation in the
same subnet it works fine.

Another guy in the office read somewhere that this packet is not routeable
by any router, but I thought someone here could verify that. The router
in question is a Cisco 3550.