Tut Systems XL-12000S - Manual (Page 62)

XL-12000S
MANAGED, HIGH-SPEED NETWORK MODEM USER GUIDE
54 TUT SYSTEMS 10.0 TROUBLESHOOTING
6. Cannot Telnet to the modem.
If an IP Address is assigned to one or both ports of the modem
and Telnet access is not available this can be caused by three
factors:
First, check to be sure that the last serial console port session
has been closed out by pressing <Ctrl-X> from the Main Menu.
Second, try to ping the modem’s IP Address. If you cannot ping
the modem, then the PC does not know how to get to the
modem. Specifying a default gateway for the modem via the
serial console port should fix this. To specify a default gateway
for the modem, select “M” from the Main Menu. This will
bring up the Modem Management screen. Locate the field for
the default gateway. If there is no value or an incorrect value in
this field, the gateway doesn’t know how to reach the PC.
Consult with your network administrator for the correct value.
Third, if a ping is successful, the problem more than likely lies
within the PC. The default gateway entry in the PC may be
wrong. In Windows 98 and earlier versions, if more than one
default gateway is specified, only the first entry is used. Make
sure only one correct default gateway entry is present on the PC.
Finally, if the IP address(es) have recently changed on the
modem, the IP ARP cache maybe inaccurate. Flush the IP ARP
caches on routers and PCs trying to reach the modem.
7. Cannot ping the modem.
If you cannot ping the modem, then the PC does not know how
to get to the modem. Specifying a default gateway for the
modem should fix this. To specify a default gateway for the
modem via the serial console port, select “M” from the Main
Menu. This will bring up the Modem Management screen.
Locate the field for the default gateway. If there is no value or
an incorrect value in this field, the gateway doesn’t know how
to reach the PC. Consult with your network administrator for
the appropriate value.
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