Link Troubleshooting; Link Configuration Methods - HP Jetdirect 640n Setup Manual

Link Troubleshooting

If the HP Jetdirect 640n Print Server does not successfully connect to the network:
●
All LEDs (Link, Activity, and link speeds 10, 100 and 1000) will be off.
●
LAN ERROR - LOSS OF CARRIER will be indicated on the HP Jetdirect Configuration Page.
If a link failure is indicated, try the following:
●
Verify cabling connections.
●
Manually configure the link setting on the print server to match the port configuration of the
network hub or switch. For manual configuration methods, see
on page
server.
●
Print an HP Jetdirect configuration page and verify link settings on the print server.
Table 4-2
Item
Port Config
Auto
Negotiation

Link Configuration Methods

The HP Jetdirect 640n Print Server supports 10, 100, or 1000 Mbps network link speeds using full-
duplex or half-duplex communication modes (a 1000T half-duplex selection is not supported). By
default, the print server will attempt to auto-negotiate its link operation with the network.
When connecting to network hubs and switches that do not support auto-negotiation, the print server
will configure itself for 10-Mbps or 100-Mbps half-duplex operation. For example, when connected to
a non-negotiating 10 Mbps hub, the print server will automatically set itself to operate at 10 Mbps half-
duplex.
18 Chapter 4 Troubleshooting
18. Turn the printer/MFP off, then on again, to re-initialize the setting on the print
Link Settings
Description
If the print server is properly linked, this item indicates one of the following link settings:
◦
10BASE-T HALF: 10 Mbps, half-duplex
◦
10BASE-T FULL: 10 Mbps, full-duplex
◦
100TX-HALF: 100 Mbps, half-duplex
◦
100TX-FULL: 100 Mbps, full-duplex
◦
1000TX FULL
If the print server is not properly linked, one of the following messages will appear:
◦
UNKNOWN: The print server is in an initialization state.
◦
DISCONNECTED: A network connection has not been detected. Check network cables. Re-
configure the link settings on the print server, or cold-reset the print server.
Indicates whether auto-negotiation for link configuration is on or off.
◦
ON (default): The print server will attempt to automatically configure itself onto the network at
the proper speed and communication mode.
◦
OFF: You must manually configure the link speed and communication mode using the control
panel menus. Your settings must match those of the network for proper operation.
Link Configuration Methods
ENWW