3Com DSA-3CV1100-02 service manual Telnet Connection Problems

130TROUBLESHOOTING

Table 20 Fatal Error Messages (continued)

Error message	Significance	User Action
Ethernet selftest failed!	Hardware error during	Contact Technical Support.
	initialization
HDLC selftest failed!	Hardware error during	Contact Technical Support.
	initialization
I2C selftest failed!	Hardware error during	Contact Technical Support.
	initialization
DRAM data bus test fail!	Hardware error	Contact Technical Support.
DRAM address bus test fail!	Hardware error	Contact Technical Support.
No MAC address for agent!	No MAC address on the	Contact Technical Support.
	card in slot 1. This is the
	card that provides
	central management
	for the VCN AC.

Boot-up and initialization are processes that occur when a card in an VCN AC slot is reset. Reset occurs when the user selects Reset board or Reset port from the menu system.

Telnet Connection Problems

Telnet connection problems take two forms:

■The user cannot connect the management computer to the management agent; refer to Inability to Connect

■An established Telnet session is broken; refer to Broken Session.

Inability to Connect An inability to connect can have a number of causes which should be verified. Some problems are not location dependent while other problems are.

■Perform these location independent checks:

■You are using a good cable.

■Your Telnet terminal emulation is VT100.

■You are using the correct IP address of the management agent.

■Your login ID and password are correct.

■Another Telnet session does not exist. Only one Telnet session is supported.