Sun Microsystems 3U - Manual (Page 57)

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.
sunmacsel N 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.