Hello all
Well, I'm running against a brick wall with some config issues. We have several sites that have ROAS systems using port channels that we want to connect to other switches to extend the network. We are using broadband radio links to connect sites via dot1q trunks, all switches and routers have identical configurations, IP addressing notwithstanding. Some sites have worked fine and some have not worked at all, so much so that clients cannot even ping a directly connect interface on the router but can ping the default gateway for the VLAN on the same router.
Another thing you could do is run Wireshark or Sniffer and see what is happeneing when you ping from a PC at one site and it works but another PC at another site doesn't work.