5-10
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
Establishing Redundancy Between SONET/SDH Lines with APS
Step 5
To verify your configuration changes, enter the dspln -ds3 <X.line> command.
If you are configuring a Cisco MGX 8850 (PXM1E/PXM45) switch, replace X with 15 for an SRM in
the upper bay, or 31 for an SRM in the lower bay. If you are configuring a Cisco MGX 8830 switch,
replace X with 7. Replace line with the line number, which is in the range of 1 to 3 on an SRM-3T3/C
card.
Establishing Redundancy Between SONET/SDH Lines with APS
On Cisco MGX 8850 (PXM1E/PXM45) and Cisco MGX 8830 switches, the SRME and SRME/B
support intercard redundancy, where the working line is connected to the primary card, and the
protection line is connected to the secondary card.
Note
T3 configurations of SRM do not support APS redundancy.
To establish redundancy between two lines on different cards, use the following procedure.
Note
For intercard APS to operate properly on a Cisco MGX 8850 (PXM1E/PXM45), an APS connector must
be installed between the two SRM back cards. For more information in the APS connector and how to
install it, refer to either the Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and
Cisco MGX 8880 Hardware Installation Guide, Releases 2 Through 5. For a Cisco MGX 8830 shelf, you
do not need to install a separate APS connector between the two SRM cards because APS functionality
is built into the switch.
-clk
The -clk option selects the 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. For information on defining the clock source for the
local switch, see the “
Managing the Time of Day Across the
Note
This option does not apply to SRME/B cards.
SRME/B cards operate in free run mode.
-rfeac
Specifies the number of bits for FEAC validation. Replace
<RcvFEACValidation> with either a 1 to specify 4 out of 5
bits, or 2 to specify 8 out of 10 bits.
Note
Option 1, 4 out of 5 bits, is the only option supported
on SRME/B cards.
Table 5-2
Parameters for T3 Line Configuration (continued)
Parameter
Description