Specifications

5-6
Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 5 Preparing SRM Cards for Communications
Setting Up SRM Lines
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.”
-lpb Enables one of two loopback types or disables an active loopback, as follows:
• 1: No loopback
• 2: Local loopback
• 3: Remote loopback
A loopback circulates OAM cells between the card and the CPE in a local loopback or
between the card and the network in a remote loopback. The loopback continues until you
halt it by again running the cnfln command with the parameter sequence -lpb 1.
Default: no loopback
-sfs Enables/disables the frame scramble feature. Replace <FrameScramble> with 1 to disable
frame scramble, or 2 to enable frame scramble.
-rdiv Specifies the number of RDI V bits. Replace <RDI-V Type> with either a “1” for 1 bit or
a “3” for 3 bits.
-rdip Specifies the number of RDI P bits. Replace <RDI-V Type> with either a “1” for 1 bit or a
“3” for 3 bits.