3Com 11.3 manual Network Layer Addresses

32CHAPTER 4: CONFIGURING BASIC SETTINGS

ISDN	An ISDN address is a phone number provided by your
	telecommunications carrier. It can include a dial prefix, country
	code, area code, and phone number. It can consist of a maximum
	of 30 characters. If you create a subaddress, you must separate the
	phone number and the subaddress with a semicolon (;). The
	subaddress can be composed of a maximum of 20 characters.
	The following is an example of a valid ISDN address, including
	a subaddress:
	011122134567000;200
	For complete information on ISDN addresses, see Using
	Enterprise OS Software.
Network Layer Addresses
AppleTalk	Consists of the network number and node ID. Each AppleTalk node
	address is unique throughout the AppleTalk Internet. For details on
	assigning an AppleTalk address, see Reference for Enterprise OS
	Software. The following is an example of an AppleTalk address:
	4.23
DECnet	Consists of an area address and a node address. The area number
	identifies the area to which the router belongs. Enter an area
	number between 1 and 63. The node number assigned to the router
	must be unique within the area. Enter a node number between 1
	and 1,023. For details on assigning a DECnet address, see Reference
	for Enterprise OS Software. The following is an example of a
	DECnet address:
	1.15
Internet	Also known as an IP address. It consists of up to 12 decimal digits
	arranged in four three-digit fields separated by periods, as shown in
	the following format:

xxx.xxx.xxx.xxx

Leading zeros can be omitted. For example, the following addresses are the same:

010.002.002.001

10.2.2.1

An Internet address is required for:

■ A bridge/router port to perform IP routing ■ The bridge/router to be accessed via Telnet

■ The bridge/router to respond to the PING command from another host

■ The bridge/router to participate in SNMP-based network management

An address includes both a network number and a host number. The actual format of these numbers varies depending on the class of address being designated. Address class is determined by the value in the first octet of the address.

Table 6 shows valid address classes, the range of the first address field, and the resulting address format. The maximum value for any single field is 255.