Netopia 2200 - Manual (Page 251)

251
CONFIG Commands
The broadcast address for most networks is the network number followed by 255. For
example, the broadcast address for the 192.168.1.0 network would be 192.168.1.255.
set ip dsl vccn netmask netmask
Specifies the subnet mask for the TCP/IP network connected to the vir tual circuit. The sub-
net mask specifies which bits of the 32-bit binar y IP address represents network informa-
tion. The default subnet mask for most networks is 255.255.255.0 (Class C subnet
mask).
set ip dsl vccn restriction { admin-disabled | none }
Specifies restrictions on the types of traffic the Netopia Gateway accepts over the DSL vir-
tual circuit. The admin-disabled argument means that access to the device via telnet,
web, and SNMP is disabled. RIP and ICMP traffic is still accepted. The none argument
means that all traffic is accepted.
set ip dsl vccn addr-mapping { on | off }
Specifies whether you want the Netopia Gateway to use network address translation (NAT)
when communicating with remote routers. Address mapping lets you conceal details of
your network from remote routers. It also permits all LAN devices to share a single IP
address. By default, address mapping is turned “On”.
set ip dsl vccn rip-send { off | v1 | v2 | v1-compat | v2-MD5 }
Specifies whether the Netopia Gateway should use Routing Information Protocol (RIP)
broadcasts to adver tise its routing tables to other routers. RIP Version 2 (RIP-2) is an
extension of the original Routing Information Protocol (RIP-1) that expands the amount of
useful information in the RIP packets. While RIP-1 and RIP-2 share the same basic algo-
rithms, RIP-2 suppor ts several additional features, including inclusion of subnet masks in
RIP packets and implementation of multicasting instead of broadcasting (which reduces
the load on hosts which do not suppor t routing protocols. RIP-2 with MD5 authentication is
an extension of RIP-2 that increases security by requiring an authentication key when
routes are adver tised.
Depending on your network needs, you can configure your Netopia Gateway to suppor t RIP-
1, RIP-2, or RIP-2MD5.