Specifications

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Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 9 Switch Operating Procedures
Managing Load Sharing
Clearing a Call at the Destination Node
When a call setup message reaches its destination, you can ensure that the call is cleared by entering the
pathtraceport command as follows:
mgx8830a.1.PXM.a > pathtraceport <portid> -X
Replace portid using the format slot:bay.line:ifNum. Table 9-1 describes these parameters. The -X
parameter ensures that calls will be cleared once they reach the destination specified in the portid
parameter.
Managing Load Sharing
When redundant PXM cards are used, load sharing enables traffic routing through the switch fabric on
both PXM cards, doubling the capacity of the switch. Load sharing is enabled by default and should only
be disabled for testing or debugging purposes.
The switch provides two options for load sharing management: Auto Shutdown and Plane Alarm
Threshold. The switch fabric on each PXM is made up of 3 switch planes that each contain links to 14
slots within the switch chassis. When the Auto Shutdown feature is enabled and one of these internal
links fails, that link is automatically shut down, and the card in the affected slot must use a link to another
switch plane. If Auto Shutdown is not enabled and a link goes bad, the affected card slot can still attempt
to use that link.
The Plane Alarm Threshold option defines the threshold at which a switch plane is declared bad and
reported as such. When a switch plane is reported as bad, the PXM on which the switch plane resides
should be replaced.
The following procedures describe how to view the load sharing option settings and how to change them.
Displaying Load Sharing Status
Enter the dspxbarmgmt command to display the status of the load sharing options. The following
example shows the display for this command.
mgx8830a.1.PXM.a > dspxbarmgmt
Table 9-26 Path and Connection Trace Commands
Command Description
dsppathtracenode <enable|disable> Displays the nodal configuration for the path and
connection trace.
dsppathtraceport <portid> Displays the port configuration for the path and
connection trace.
dsppathtraceie <portid> Displays whether or not TTL 1E is included in the
specified port’s configuration.
dsppathtracebuffer <portid><vpi><vci> Displays a specific connection based on the physical port’s
id, vpi, and vci.
dsppathtracebuffer Displays all path traces in all the path trace buffers.
conntrace Displays all path traces in all the path trace buffers.