Tahoe 681 User Manual - Serial Console
10
4.
Modem configuration using telnet or
serial console
4.1.
Telnet connection
To connect to the modem the network interface in your PC has to
be in the same IP subnet as the modem. By default the modem’s
Ethernet interface is set to 10.0.0.1 address and 255.0.0.0 netmask, so
the PC may have IP address set to 10.0.0.2 and the same netmask.
If the modem was already configured and the routing table is
correctly set up, a telnet connection to its IP address is possible from
anywhere in the network.
After connecting a password prompt will appear:
User Access Verification
Password:
The default password is “Tahoe” (case sensitive). If the
password entered is correct, a command prompt will appear:
Tahoe>
4.2.
Serial console
If the telnet connection is not possible (e.g. there’s no telnet client
available or the modem’s IP address is unknown), the modem may be
connected to the PC’s serial port using a null-modem cable. After starting
a terminal software (e.g. minicom under Linux operating system,
®
Hyperterm under Microsoft Windows™) user gets the same access as
through the telnet connection. After pressing Enter the same command
prompt appears:
Tahoe>
By default the console access isn’t password protected, but such
protection may be enabled later using “console password” command.
11
4.3.
Commands
4.3.1.
?, help
Entering “?” or “help” shows a list of available commands.
4.3.2.
arp
The “arp” command is used to configure the ARP table. The “arp”
alone shows the list of connections between IP and hardware (MAC)
addresses:
Tahoe> arp
IP address
Hardware address
10.0.0.2 00:50:04:0D:70:31 dynamic
ARP table entries may be deleted using “arp del”:
Tahoe> arp del 10.0.0.2
(the IP address to be deleted should be typed instead of
“10.0.0.2” ).
A static ARP entry may be added using “arp add”:
Tahoe> arp add 10.0.0.3 00:50:13:E9:5C:01
The dynamic hardware address resolution may be disabled using
the “ifconfig” command. If it is disabled, only those stations may connect
to the modem, whose IP and MAC addresses are entered into the ARP
table using the “arp add” command. This way an unauthorized network
access may be prohibited.
4.3.3.
bridge
The “bridge” command enables or disables the bridge mode, in
which two interconnected LANs create one whole in the hardware layer.
The stations in both LANs behave like if they were connected to one
®
Ethernet switch, e.g. PCs working under Microsoft Windows™
operating system will see each other in the network neighborhood.
Three settings are available:
¡
off - regular TCP/IP routing
¡
on - bridge enabled, but the modem is still available under its IP
address and thus may be managed remotely
4.1
4.2
4