Configuring Lines - Cisco MGX 8850 (PXM1E/PXM45) Configuration Manual

Chapter 3 Provisioning PXM1E Communication Links
Tip If the upln command fails for a line that requires a field replaceable unit (FRU) transceiver, enter the
dsplns command and verify that the Line Type column for the specified line has an entry that indicates
what type of FRU transceiver is installed. If no transceiver is installed, the line cannot be brought up.
To verify that a line has been brought up, enter the following command:
Step 4
mgx8830b.2.PXM.a > dsplns
The line state column shows whether each line is up or down as shown in the following example:
mgx8830b.2.PXM.a > dsplns
Sonet
Line
------------- ----- ------------ ------ -------- ------ -------- ------ ------- -------
2.1 Adj APS
2.2
2.3
2.4
2.1
The line state represents the administrative intent for the line. For example, a line is reported as Down
until an administrator brings up the line. Once the administrator brings up the line, the line state remains
Up until the administrator brings the line down with the dnln command.
The alarm state indicates whether the line is communicating with a remote switch. When the alarm state
is reported as Clear, the physical devices at each end of the line have established physical layer
communications.

Configuring Lines

All line types are brought up with a default configuration. When configuring trunks between switches,
you can accept the defaults for each line and thus minimize configuration time. If you modify line
characteristics, make sure the parameter values are the same at both ends of the line.
Use the cnfln command to modify a line's configuration.
configure for each line type, and the following subsections describe how to enter the cnfln command for
each line type.
Table 3-2
Parameter
AIScBitsCheck
bay.line
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Line Line
State Type
Up sonetSts3c NoLoop
Down sonetSts3c NoLoop
Up sonetSts3c NoLoop
Down sonetSts3c NoLoop
Up sonetSts3c NoLoop
Parameters for cnfln Command
Line Types
Supported
T3
T1
E1
T3
E3
SONET
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Medium Medium
Line Frame Line
Lpbk Scramble Coding
Enable NRZ ShortSMF
Enable NRZ ShortSMF
Enable NRZ ShortSMF
Enable NRZ ShortSMF
Enable NRZ ShortSMF
Table 3-2
Description
The -cb option defines C-bit checking. Set <AIScBitsCheck>
to 1 to enable C-bit checking. Set it to 2 to ignore the C-bit.
Replace bay with 2 to specify that the line is connected to a
PXM1E back card in the uplink bay.
Replace line with the number that corresponds to the line you
want to configure.
General PXM1E Configuration Procedures
Line Valid Alarm
Type Intvls State
72 Clear
0 Clear Disable
72 Clear Disable
0 Clear Disable
72 Clear
describes the parameters you can
APS
Enabled
Enable
Enable
3-23