Specifications

5-6
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 5 Preparing SRM Cards for Communications
Setting Up SRM Lines
If you are configuring a Cisco MGX 8850 (PXM1E/PXM45) switch, replace X with 15 for an SRME in
the upper bay, or 31 for an SRME in the lower bay. If you are configuring a Cisco MGX 8830 switch,
replace X with 7. SRME provides one line, so the line number is always one as shown in the following
example:
PXM1E_SJ.8.PXM.a > dspln -sonet 31.1
Line Number : 31.1
Admin Status : Up
Loopback : NoLoop APS enabled : Disable
Frame Scrambling : Enable RDI-V Type : one bit
Xmt Clock source : localTiming RDI-P Type : one bit
Line Type : sonetSts3 VT Type : vt15/vc11
Medium Type(SONET/SDH) : SONET VT Mapping Type : asynchronous
Medium Time Elapsed : 508 VT Framing Type : N/A
Medium Valid Intervals : 0 VT Signalling Mode : N/A
Medium Line Type : ShortSMF VT Grouping Type : N/A
Step 3 To configure a SONET or SDH line, enter the cnfln command as follows:
mgx8830b.1.PXM.a > cnfln -sonet <X.1> -slt <LineType> -clk <clockSource> -lpb <loopback>
-sfs <FrameScramble> -rdiv <RDI-V Type> -rdip <RDI-P Type> -tt <Tributary Type> -tm
<TributaryMappingType> -tf <TributaryFramingType> -st <SignallingTranportMode> -tg
<TributaryGroupingType>
Remember that you cannot configure a line until you have brought it up as described in the previous
section, “Bringing Up Lines.” Table 5-1 lists the parameter descriptions for configuring SONET and
SDH lines.
Table 5-1 Parameters for SONET Line Configuration
Parameter Description
X.1 Replace X with 15 if you are configuring an SRM in the upper
bay, or replace it with 31 if you are configuring an SRM in
the lower bay.
The number 1 represents the one and only line on an SRME
card.
-slt Optical line type. Replace < LineType> with 1, to specify
SONET, or replace < LineType> with 2 to specify SDH.
-clk The -clk option selects the primary source timing for
transmitting messages over the line. Replace <clockSource>
with 1 to use the clock signal received over this line from a
remote node, or specify 2 to use the local timing defined for
the local switch.
Note On SRME/B cards, when the selected primary source
timing is not operating properly, the SRME/B will
use the other timing option. For example, if you select
option 1 as the primary source, option 2 will be the
secondary source and will be used when the option 1
timing fails.
For information on defining the clock source for the local
switch, see the “Managing the Time of Day Across the
Network Using SNTP” section in Chapter 9, “Switch
Operating Procedures.”