Sun Microsystems 3U manual ATM ARP Server Address, 3Predefined SunATM Variables

TABLE 4-3

To simplify references to ATM addresses in the SunATM software, several system- defined variables are built into the software. Variables are referenced with the $

operator, as in UNIX shell scripts. summarizes the system-defined SunATM ATM address variables.

TABLE 4-3Predefined SunATM Variables

Variable	Description
prefix	The 13-byte prefix associated with the local switch.
mac	The 6-byte medium access control (MAC) address associated
	with the local host or interface.
sel	The default 1-byte selector for the local interface.
macsel	The concatenation of $mac:$sel.
myaddress	Concatenation of $prefix:$mac:$sel, resulting in the
	default address for the local interface.
sunmacselN	Concatenation of one of a series of reserved MAC addresses
	and $sel to create a block of reserved ATM ARP server
	addresses. N should be a decimal number in the range 0–199.
localswitch_server	Concatenation of $prefix, a unique reserved MAC address,
	and $sel. When used as a server address, restricts server
	access to clients connected to the local switch only.

Note –The $prefix variable, and any other variables that use it (including

$myaddress and $localswitch_server), may not be used on interfaces that are not running ILMI.

ATM addresses are represented by 20 colon-separated octets, with each octet made up of 1 or 2 hexadecimal digits. You can combine variables representing portions of an ATM address with other variables and/or octets to make up a complete address. For example, $prefix:aa:bb:cc:dd:ee:ff:$sel represents a valid ATM address.

ATM ARP Server Address

If you configured the Classical IP instance as a client, you must also enter the address of the ARP server. This parameter, like the local ATM address, must be a 20-byte ATM address. See “ATM Address Formats and Variables” on page 34 for a discussion of ATM address formats and variables.

Chapter 4 Configuring the SunATM Interfaces 35