Environment: host1 and host2 are both on the same 2950. 2950 is 2nd of 3 in a stack; 1st 2950 has a 1000LX uplink to a 4003. 4003 has 1000LX connection to another 4003, which is 1000LX to a 6000. 6000 to another 4000 via 1000LX, then 1000SX to a 3508...