can't ping single host

[rkmorrow]

I have a win2k laptop computer on a subnet trying to reach an ibm mainframe. The computer has connected to the mainframe in the past.

The client goes to a hub with a 1600 router then via point-to-point line to a 2600 router to a switch. The mainframe is connected to the switch.

laptop---1600----2600---switch---mainframe

The laptop has suddenly lost ip connection to the mainframe. Everything else on the subnet that the mainframe is on, will connect to the laptop. It is only the single ip address that she cannot ping. When I change HER ip address, she can connect again to the mainframe. No one else in eight different routed locations has a problem connecting to the mainframe. When I did a traceroute from her machine to the mainframe, the packet gets to the serial interface of the 2600, but dies at the ethernet interface where the switch is connected to the mainframe.

The only thing I can think of is a hardware address issue with her ip address on the switch in the mainframe location. connectivity after changing the ip address tells me it isn't a route table issue.

Any ideas would be appreciated.

rk

 

[Ntr0P]

Sounds like the route table on the mainframe.