User`s guide

Cayman 3220-H User’s Guide Using the Command Line Interface

December 2000 4-25

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 is 192.168.1.255.

set ip dsl vccn netmask netmask

Speciﬁes the subnet mask for the TCP/IP network connected to the

virtual circuit. The subnet mask speciﬁes which bits of the 32-bit

binary IP address represent network information. The default subnet

mask for most networks is 255.255.255.0 (Class C subnet mask).

set ip dsl vccn restriction

{ admin-disabled | admin-only | none }

Speciﬁes restrictions on the types of trafﬁc the Cayman 3220-H

accepts over the DSL virtual circuit. For security reasons, the

admin-disabled argument is the default; it means that router trafﬁc

is accepted but that administrative commands are ignored. The

admin-only argument means that router trafﬁc is ignored but that

administrative commands are accepted. The none argument means

that all trafﬁc is accepted.

set ip dsl vccn addr-mapping { on | off }

Speciﬁes whether you want the Cayman 3220-H to use network

address translation (NAT) when communicating with remote

routers. Address mapping lets you conceal details of your network

from remote routers. By default, address mapping is turned on.

For more information on network address translation, see “About

Network Address Translation” on page C-2..

set ip dsl vccn proxy-arp { on | off }

Speciﬁes whether you want the Cayman 3220-H to respond when it

receives an address resolution protocol for devices behind it. By

default, proxy ARP is turned off.