Troubleshooting guide

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Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
Chapter 3 Cisco PGW 2200 Softswitch Platform Operations
Regular Operations
• null_string—An empty string (entered as “ “ in the command line). If you enter a null string in this
command, the command in Step 4 displays the DNS IP addresses, size of the cache, percentage of
the cache being used, and the local TTL value.
For example, to start a DNS Information Request for the cache that is associated with the signaling
service, sipsigpath, enter one of the following commands:
sta-dns-info:sipsigpath:”sipphone1.cisco.com”
sta-dns-info:sipsigpath:”10”
sta-dns-info:sipsigpath:””
Step 4 Request the contents of the specified DNS cache that is associated with an SIP signaling service. To issue
this request, enter the rtrv-dns-info:sippath_name command:
Where: sippath_name—MML name of the SIP signaling service that you entered in Step 1.
If you entered the associated URL along with name of the SIP signaling service in Step 1, the system
returns a message like the following.
Media Gateway Controller 2000-03-26 19:23:23
M RTRV
IP address = 193.12.174.56
TTL = 240
If you entered the associated cache entry number along with the name of the SIP signaling service, the
system returns a message like the following.
Media Gateway Controller 2000-03-26 19:23:23
M RTRV
URL = sipphone3.cisco.com
IP address = 193.12.174.56
TTL = 240
If you entered a null string along with the name of the SIP signaling service, the system returns a
message like the following.
Media Gateway Controller 2000-03-26 19:23:23
M RTRV
DNS 1 address 193.12.77.2
DNS 2 address 193.21.9.76
Cache size = 280
Cache usage = 81
Local TTL = 240 ;
Purging the Contents of the DNS Cache
To purge the DNS cache, log in to the active Cisco PGW 2200 Softswitch, start an MML session, and
enter the sta-dns-purge:sippath_name command:
Where:
sippath_name—MML name of the SIP signaling service that is associated with the DNS cache.
For example, to purge the DNS cache that is associated with the signaling service, sipsigpath, enter the
sta-dns-purge:sipsigpath command: