Tahoe 681 User Manual - 4.3.6
12
¡
transparent - completely transparent bridge, inaccessible under
its IP address - this mode may be disabled only through the serial
console or the LCD and keyboard.
Entering “bridge list” displays a list of MAC addresses with the
name of the interface on which certain address was heard.
Note: To make bridging work properly interfaces used in the process
have to be indicated. To enable bridging on a certain interface
enter “ifconfig
®
Note:
To enable bridging the Cisco HDLC link protocol should also be
selected using “dsl hdlc” command
4.3.4.
con
The „con” command erases whole configuration from the
EEPROM. After rebooting the modem it will return to its factory defaults.
Until the reboot it will continue to run with its current settings, which can
be saved again using “write” command.
4.3.5.
config
The „config” command displays current configuration. The
command output may be entered on another modem to make an exact
copy of the configuration.
4.3.6.
console
This command is used to enable or disable password the
protection of the serial console. By default the console is unprotected
and user has full access to the modem. By entering:
console passwd on
the password requirement is enabled and modem will ask for it in the
same manner as during the telnet connection. To disable password
protection type:
console passwd off
4.3.7.
dhcp
The “dhcp” command is used to configure DHCP/BOOTP server
and relay agent. The server is used to assign IP addresses, network
masks, gateway and DNS addresses and other parameters to the
13
network stations. It is easy to reconfigure a network that uses a DHCP
server - it is enough to change server settings and every station will
automatically retrieve new configuration.
The BOOTP protocol is an earlier and simpler version of DHCP. Its
common use is booting of diskless workstations. A workstation uses
BOOTP to get its IP address and other network parameters together with
TFTP server address, from which the operating system may be
downloaded.
The DHCP protocol may deliver more working parameters
including domain name, DNS address, print server, syslog server, X-
Window fontserver, MTU and TTL settings, and many others.
DHCP/BOOTP Relay Agent transfers DHCP and BOOTP requests
and replies between separate networks. The DHCP and BOOTP protocols
work only within one physical subnet. The station using such protocols
doesn’t know its IP address yet, so its packets cannot be routed to other
networks. Relay Agent listens for such requests and forwards them to a
DHCP server, which may be placed anywhere in the network.
4.3.7.1. Review of the settings
Entering “dhcp” alone displays current server settings. Here is an
example:
Tahoe> dhcp
DHCP/BOOTP server
default-lease-time 43200
max-lease-time 86400
network "lan" (eth0):
default-lease-time 43200
max-lease-time 86400
domain-name tahoe.pl
subnet "local": 10.0.0.0/255.255.255.0
default-lease-time 43200
max-lease-time 86400
filename vmlinuz.2.2.19
next-server 192.168.0.5
routers 10.0.0.1
domain-name-servers 192.168.0.4
domain-name tahoe.pl
address ranges: 10.0.0.3-10.0.0.15
relay server 192.168.0.5 67