Sun Microsystems SunATM 3U, Инструкция по установке и эксплуатации

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Chapter 5 Editing SunATM Configuration Files 43
Changing the Framing Interface in the
atmconfig
File
The framing interface defines the encapsulation method used for ATM cells as they
are sent onto the wire. The default framing interface is SONET, but the SunATM
software also supports the SDH interface. Your switch product information should
indicate which interface your switch uses.
Previous versions of the SunATM software allowed you to choose a framing
interface for the entire system (by setting a variable in the
/etc/system
file). In the
SunATM software, the system variable can be used to allow backward compatibility,
but the preferred method is to select the framing interface for each interface and to
add an entry in the
/etc/opt/SUNWconn/atm/atmconfig
file. An entry in
/etc/
opt/SUNWconn/atm/atmconfig
overrides a variable set in
/etc/system
for a
particular interface. If there is no value in either
/etc/system
or
/etc/opt/SUNWconn/atm/atmconfig
, the default framing
interface is SONET.
Framing entries in
/etc/opt/SUNWconn/atm/atmconfig
should appear on
individual lines, with two fields. The first field indicates the interface,
ma
N, where N
is the instance number (for example:
ba0
). The second is either
SDH
or
SONET
,
depending on the desired setting.
Example of an
atmconfig
File
The following sample
/etc/opt/SUNWconn/atm/atmconfig
file creates this
configuration:
■
A LAN Emulation interface
lane0
, supporting UNI 3.1, on the
ba0
interface.
■
An interface that supports both Classical IP and LAN Emulation on
ba
, using
UNI 4.0. The LAN Emulation interface name is
lane1
.
■
A Classical IP interface, supporting UNI 3.0, on
ba2
, which uses the SDH framing
interface.
#Interface UNI/Framing CIP_Host LANE_Instance LANE_Host
#--------------------------------------------------------------
ba0 3.1 - 0 atm0
ba1 4.0 atm1 1 atm2
ba2 3.0 atm3 - -
ba2 SDH