Network Connection Tests

1.  I disconnected the ethernet cable from HalldEN2T1, which is in Backplane 0 with the PLC
	a. HMI lost connection, because this is the RSLinx Enterprise connection
	b. RSLogix5000 lost connection because RSLinx was lost.
	c. All I/O modules in Backplane 3 had a red light in the "OK" window indicating faulty communications
2.  I plugged the ethernet cable back in
	a. RSLinx Enterprise reconnected automatically
	b. I/O modules in Backplane 3 had "OK" lights go to green
	c. I was able to go back "online" with RSLogix5000
3.  I unplugged the ethernet cable from HalldEN2T2, which is in Backplane 3
	a. All I/O modules in Backplane 3 had red light in "OK" window
	b. RSLogix5000 reported that the module was not connected
4.  I plugged the ethernet cable back in
	a. I/O modules in Backplane 3 went from red to green
	b. RSLogix5000 reconnected with the module automatically
5.  I unplugged the EWEB module
	a. Display screen displayed "LINK LOST"
	b. No other indication of failure
6.  I plugged EWEB back in
	a. Display changed to "OK"
7.  I unplugged the ethernet cable from the back of halldsc5
	a. All data in HMI went blank
	b. No HMI control available -- nothing worked.
8.  I plugged the ethernet cable back into halldsc5
	a. HMI Software indicated that ethernet connectivity was restored, but HMI Control was not automatically restored
	b. I checked the status of the HMI Server and the RSLinx Enterprise server.  HMI Server was running, but RSLinx Enterprise Server (hosted on halldsc2) was "unreachable"
	c. I tried to ping halldsc2 from halldsc5 and the request timed out
	d. I tried to ping halldsc5 from halldsc2 - I was successful
	e. I logged out of halldsc5 and logged in again.  Tried to ping halldsc2 - unsuccessful
	f. I restarted halldsc5.  Still unable to ping halldsc2
	g. I restared halldsc2.  I was able to ping halldsc2 from halldsc5 and RSLinx Enterprise came back online.
9.  I unplugged the ethernet cable from halldsc2
	a. HmI data went blank
10. I plugged the ethernet cable back into halldsc2
	a. HMI software did not recover.  It indicated that halldsc2 was "unreachable"
	b. Tried to ping halldsc2 from halldsc5 - unsuccessful
	c. Tried to ping halldsc5 from halldsc2 - successful
	d. Logged out and back into halldsc2 - still "unreachable"
	e. Rebooted halldsc2.  After some time, its status changed to "Active", HMI control was restored.