Specifications
3-18
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 3 Preparing AXSM Cards and Lines for Communication
Setting Up Lines
Configuring E3 Lines
All line types are brought up with a default configuration. When configuring trunks between two
MGX 8850 or MGX 8950 switches, you may be able to accept the defaults for each switch and thus
minimize configuration time. When configuring a line to another type of device, ensure that both devices
are using the same configuration parameters on the shared line.
At the physical communications level, you can configure the following options for E3 lines:
• Line length (distance in meters)
• Line clock source
The following procedure describes how to configure E3 lines.
Step 1 Establish a configuration session using a user name with GROUP1 privileges or higher.
Step 2 If you do not know the line number you want to configure, enter the dsplns command to display a list
of the lines:
Step 3 To verify your configuration changes, enter the dspln command.
8850_LA.4.AXSM.a > dspln
Remember that you cannot configure a line until you have brought it up as described in the previous
section, “Bringing Up Lines.”
Step 4 To configure an E3 line, enter the following command:
8850_LA.4.AXSM.a > cnfln -ds3 <bay.line> -len <LineLength> -clk <clockSource>
Table 3-4 lists the parameter descriptions for configuring SONET, DS3 and E3 lines. Be sure to use only
the parameters listed for E3 lines.
Step 5 To verify your configuration changes, enter the dspln command.
Verifying Line Configuration
To display the configuration of a line, use the following procedure.
Step 1 Establish a CLI management session at any user access level.
Step 2 If you do not know the line number you want to view, display a list of the lines by entering the following
command:
mgx8850a.10.AXSM.a > dsplns
Step 3 To display the configuration of a single line, enter the following command:
mgx8850a.10.AXSM.a > dspln -type <bay.line>
Table 3-5 describes the command parameters. The line configuration appears as follows:
pop2one.10.AXSM.a > dspln -sonet 2.1
Line Number : 2.1
Admin Status : Up Alarm Status : Clear
Loopback : NoLoop APS enabled : Disable
Frame Scrambling : Enable Number of ports : 1
Xmt Clock source : localTiming Number of partitions: 1