Troubleshooting guide

9-18
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 9 Troubleshooting Cisco Media Gateways
Troubleshooting Alarms
• dspfdr IF #
• dsplmistat IF # to display LMI alarms
Channel Alarm Commands
• dspconinfo
• dspcons –state fail - on PXM will show conditioned SPVCs
• cc <slot#> - The following commands are executed on the axsm
• dspcons – filt option – displays more information for port / channel alarms.
(ing (1) | egr (2) | condn (3) | iffail (4) | mis (6) abit (7) | any (8) | none (9))
• dspcon IF # vpi vci – to get more information
The following basic types of alarms are raised for the crossbar switching fabric related issues
Xbar Core Alarm
The xbar core alarms is raised when the errors detected on the crossbar links on the switch fabric card
cross the alarm thresholds. The thresholds are user configurable for three severities which are Minor,
Major and Critical for set and clear of the alarm. The threshold values for the alarm raising and the action
taken for the errors seen are the same. The alarm is cleared when the errors go below the clear threshold
values.
Some of the errors occur on a per plane basis rather than on a per link basis. These plane based alarms
are raised when plane based errors on a xbar plane are detected. They are of three types SFrame Tick,
SFrame Lock and ACP illegal target error. The SFrame Tick and SFrame lock error are critical errors
and cause the whole plane to be unusable. The whole plane i.e. all the links on that plane will be shut
down. So all slots are affected due to the plane based errors.
Xbar Port Alarm:
The xbar port alarms is raised when the errors detected on the Xbar port e.g., Humvee transceiver port
on AXSM, on the service modules cross the alarm thresholds. The thresholds use default values for the
Minor, Major and Critical for set and clear of the alarm. The threshold values for the alarm raising and
the action taken for the errors seen are the same. The alarm is not cleared when the errors go below the
clear threshold values though for the xbar port alarms.
Xbar Slot Bandwidth Alarm
The Xbar slot bandwidth alarm is raised on a per slot basis. The xbar slot bandwidth alarm is raised based
on the number of crossbar links which are available for a particular service module. The three parameters
which are used for raising the alarm are Maximum, Required, Available number of crossbar links. The
alarms have only two severities Major and Critical. A Major alarm is set when the available number of
links is less than the Max number of links and Critical alarm is raised when the operational number of
links fall below the required number of links to support the bandwidth of the service module.
Crossbar Core Alarms
If crossbar core alarms are present, then complete the following steps:
Step 1 Use dspdevalms XBARCORE -pslot * to display the core alarms for all slots. If specific slots are
reporting errors then proceed to <Blue>“Step 2 Slot Centric De-bugging”. Otherwise if all service
modules are reporting errors then proceed to <Blue>“Step 3 Plane centric de-bugging”.