Troubleshooting guide

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Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
Chapter 6 Troubleshooting the Cisco PGW 2200 Softswitch Platform
Troubleshooting Using Cisco PGW 2200 Softswitch Alarms
Corrective Action
To correct the problem, check the configuration of the affected SG and, if necessary, configure it to
connect to the peer SG.
SIP: DNS CACHE NEARLY FULL
This alarm occurs when the domain name service (DNS) cache is nearly full.
Corrective Action
To correct the problem, perform the following steps:
Step 1 To collect system data, see the method that is described in the “Collecting System Data for Cisco TAC”
section on page 6-93.
Step 2 Retrieve the current DNS properties by logging in to the active Cisco PGW 2200 Softswitch, starting an
MML session, and entering the prov-rtrv:dnsparam:“all” command:
The system returns a response like the following:
MGC-01 - Media Gateway Controller 1999-12-30 14:27:48
M RTRV
"session=test:dnsparam"
/*
*.DnsCacheSize = 500
*.DnsKeepAlive = 30
*.DnsPolicy = HIERARCHY
*.DnsQueryTimeout = 1000
*.DnsServer1 = 172.22.1.1
*.DnsServer2 = 143.83.1.1
*DnsTTL = 3600
*/
Make note of the value of the *.DnsCacheSize parameter.
Step 3 Begin a dynamic reconfiguration session to increase the value of the *.DnsCacheSize parameter, as
described in the “Invoking Dynamic Reconfiguration” section on page 3-66.
If this alarm occurs repeatedly despite increasing the size of the cache, then proceed to Step 4.
Step 4 Contact the Cisco TAC to analyze the problem further and to determine a solution. For more information
about contacting the Cisco TAC, see the “Obtaining Documentation and Submitting a Service Request”
section on page xviii.
SIP: DNS SERVICE OOS
This alarm occurs when the DNS servers do not respond to queries. The DNS servers might be out of
service or access to them might be lost.