+ 0 Votes knee jerk: check nic media type on the 2 non working boxes sgt_shultz 6 years ago do you get link lights on those two? what speed are the ports on the cisco? maybe the 2 bad boys are having trouble negotiating speed with the cisco. you could have a look at the cisco website for this one. you could also try locking the bad pc's nics 'up' to say 100mb full duplex.