In this section:
Call Trace Filtering
The global Call Trace command allows you to create and configure Call Trace Filters using criteria to determine call events added to the system trace data event log (which uses the ".TRC" file extension). The first three Call Trace filters are logged unless the stopMatch flag in enabled (whereby the number of filters logged may be less than three). The stopMatch flag will halt filter profile matching once a match is found.
The maxTriggerCount parameter is used to set/reset the Trigger Count, a mechanism used to limit the logging of call/error filter events in the .TRC file.
Please note that a system reboot, an application restart or a Live Software Upgrade (LSWU) causes the following call trace filters to go offline:
- callFilter
- callFilter/mediaPacketCapture
- callFilter/callDetailCapture
- signalingPacketCapture
To rectify this, disable and then re-enable the applicable filters using the following CLI command syntax:
% set global callTrace signalingPacketCapture state disable % set global callTrace signalingPacketCapture state enable % set global callTrace callFilter <filterName> state disabled % set global callTrace callFilter <filterName> state enabled % set global callTrace callFilter <filterName> mediaPacketCapture disable % set global callTrace callFilter <filterName> mediaPacketCapture enable % set global callTrace callFilter <filterName> callDetailCapture disable % set global callTrace callFilter <filterName> callDetailCapture enable
As a general rule, set Call Trace to ingress mode unless egress mode is specified.
Do not turn on the Call Trace Filter to trace all calls. Use of the Call Trace feature can have significant impact on the network performance of the
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strongly recommends configuring Call Filters which result in small quantities of calls being traced to avoid heavy loads. Also, be sure to delete Call Trace Filters once you have obtained the necessary information.
Use the following criteria to establish a Call Trace Filter:
- Called Party Number
- Calling Party Number
- Contractor Number
- Peer IP Address
- Redirecting Number
- Transfer Capability
- Trunk Group
Use the match keyword to specify criteria to use to capture call data upon a match. Use the key keyword to specify criteria on which to filter call data.
Call events captured are:
- Call attempt
- Lookup request sent
- Lookup request received
- Alerting received
- Cut-through received
- Call Answer received
- Cut-through complete
- Service established
- Disconnect Request received
- Call terminated
- Wait for more digits
- Extra digits receiveda
- Initiating new attempt
- Signal messages received or sent
- Egress call setup message
- Route lookup failure
- Call blocked
- Policy Request
- Policy Response
- Policy processing of calls in different layers like pre-processor, services, pre-router, router, and post-router.
- SIP signaling events for a single call incoming/outgoing to a particular source/destination IP endpoint
- SIP Protocol Data Units (PDUs) for a single call incoming/outgoing from/to a particular source/destination IP endpoint
- SIP out-of-dialog PDUs such as 18X, BYE, and INFO, regardless of whether they are successfully parsed
The TRC event log level must be info for this facility to operate properly.
Use the maxTriggerCount parameter to limit the logging of call/error filter events in the .TRC file. After configuring and enabling the callFilter, an ingress/egress call that matches the filter criteria causes the corresponding events to be logged to the .TRC file, as long as the Trigger Count has not been reached. Once the configured Trigger Count has been reached, the matching callFilter will not be triggered and events associated with the call trace filter will not be logged in the .TRC file. To re-enable triggering, you must configure the Trigger Count to a nonzero value less than 65.
Once the maxTriggerCount is reached or callTraceTimer expires, the call trace stops. To restart the call trace without changing the callTrace configuration, use following CLI command:
% request global callTrace action command start
This command is only exposed after callTrace configuration is performed. If no entries are present in the callTrace, this command is not available from CLI.
Command Syntax
Use following CLI syntax to configure call trace filters:
% set global callTrace callFilter <callFilter_name> callDetailCapture <disable|enable> key <called | calling | cddn | contractor | peerIpAddress | redirecting | transferCapability | trunkGroup> level <level1 | level2 | level3 | level4> match called <string> calling <string> cddn <string> contractor <string> peerIpAddress <IP address> redirecting <string> transferCapability <audio31Khz | speech | unrestricted | unrestrictedWithTones | video> trunkGroup <trunkGroup_name> mediaPacketCapture <disable|enable> state <disabled|enabled> stopMatch <supported | unsupported> callTraceTimer <1-360> errorFilter errorType <any | earlyAttempt | none | outOfDialog | parseError> maxTriggerCount <0-64> signalingPacketCapture devices <mgmt0 | mgmt1 | pkt0 | pkt1 | pkt2 | pkt3> <VLAN tag>
The default value for vlanTag is "0". If you want to configure VLAN and capture the packets on a specific VLAN, you must provide the devices name and the vlanTag value.
To configure signaling state:
% set global callTrace signalingPacketCapture state <enable | disable>
Command Parameters
Global Call Trace Parameters
Parameter | Length/Range | Description |
|---|---|---|
| 1-23 | The name of a call trace filter to apply to the system trace data log file. This filter may be created, configured, and deleted.
|
callTraceTimer | 1-360 | Duration in minutes that call trace is enabled. (default = 180) |
| N/A | Call error trace for SIP Call Traces only.
|
| 0-64 | Maximum number of calls that match the |
| N/A | Specifies the signaling packet capture devices and the admin state. These files are saved as .pkt files. The options are:
|
Command Examples
To enable call tracing based on the called number:
% set global callTrace callFilter CF-1 level level1 state enabled key called,calling match called 978% % set global callTrace callFilter CF-1 mediaPacketCapture enable % set global callTrace callFilter CF-1 callDetailCapture enable
To view the recently-enabled call trace filter:
% show table global callTrace callFilter
callFilter CF-1 {
state enabled;
level level1;
key called,calling;
match {
called 978%;
}
mediaPacketCapture enable;
callDetailCapture enable;
To enable signaling packet capture:
% Set global callTrace signalingPacketCapture state enable
Offline Call Trace Analysis Using LX Utility
Overview
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