We've two different IP ranges on our LAN connected via a cisco 2620 router. When we save an excel file from a pc on the first ip net to a server on the second ip range it takes 8 mins. When we do the same on a pc on the same ip net it takes only 45 sec. I suppose that this has something to do with the configuration of the router. Response time of ip traffic seems to be normal. Only NBT packests seems to give a very poor response time. I've tried to forward UDP traffic (ip forward-protocol udp) but no improvement. Can somebody help ?