Take an IP from the source host network and add it as a secondary IP on the routed interface for the vlan - for the 0.10.94.27 host add "ip address 0.10.94.254 secondary" to the router. Then do a broadcast ping from the router - ping 0.10.94.255. Then show the arp cache for the vlan - show ip arp vlan xxx | include 0.10.94. - Do you see any entries besides the router interface? If no, you probably have a misconfigured/buggy device on the network. If there are entries, you will be provided with MAC addresses which you can track down easily to the switchport in question. I use this technique to track down rougue DHCP servers, Access Points etc.

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