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Chapter 4 Configuring the SunATM Interfaces 35

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.

TABLE 4-3 summarizes the system-defined

SunATM ATM address variables.

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.

TABLE 4-3 Predefined 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.

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Sun-microsystems 3U Manual do Utilizador Página 57