Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
*Mar 12 04:03:57.181: RASlibras_sendto msg length 3 from 172.16.70.2251719 to 172.16.70.228883
*Mar 12 04:03:57.181: RASLibRASSendDCF DCF (seq# 3366) sent to 172.16.70.228
*Mar 12 04:03:57.181: RASLibRASRecvData successfully rcvd message of length 124 from 172.16.70.228883
The command “show gatekeeper endpoints” on the Cisco IOS Gatekeeper shows that all four Cisco CallManagers are registered with the Cisco IOS Gatekeeper. Remember that in the topology for this case study, there are four Cisco CallManagers, two in each cluster. This Cisco IOS Gatekeeper has two zones and each zone has two Cisco CallManagers.
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GATEKEEPER ENDPOINT REGISTRATION |
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CallSignalAddr Port RASSignalAddr | Port Zone Name | Type | ||||
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172.16.70.228 | 2 | 172.16.70.228 | 1493 gka.cisco.com | |||
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172.16.70.229 | 2 | 172.16.70.229 | 3923 | gka.cisco.com | ||
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172.16.70.245 | 1 | 172.16.70.245 | 1041 | gkb.cisco.com | ||
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172.16.70.243 | 1 | 172.16.70.243 | 2043 | gkb.cisco.com | ||
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Total number of active registrations = 4 |
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Debug Messages and Show Commands on the Cisco IOS Gateway
In the previous section, the Cisco IOS Gatekeeper show commands and debug outputs were discussed in detail. This section focuses on the debug output and show commands on the Cisco IOS Gateway. In the topology for this case study, calls are going through the
Cisco IOS Gateways. The Cisco IOS Gateway interfaces to the PSTN or PBX with either T1/CAS or T1/PRI interfaces. Debug output of commands such as debug voip ccapi inout, debug h225 events and debug h225 asn1, are shown below.
In the following debug output, the Cisco IOS Gateway is accepting the TCP connection request from Cisco CallManager (172.16.70.228) on port 2328 for H.225.
*Mar 12 04:03:57.169: H225Lib::h225TAccept: TCP connection accepted from 172.16.70.228:2328 on socket [1]
*Mar 12 04:03:57.169: H225Lib::h225TAccept: Q.931 Call State is initialized to be [Null].
*Mar 12 04:03:57.177: Hex representation of the received TPKT03000065080000100
The following debug output shows that the H.225 data is coming from the Cisco CallManager on this TCP session. Important to notice in this debug output is the protocolIdentifier, which indicates the H.323 version being used. The following debug shows that H.323 version 2 is being used. The called and calling party numbers are also shown.
-Source Address
-Destination Address e164
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