When a test case emulates a GGSN, the following parameters define the Gn interface between the node and an SGSN SUT. In the GGSN Node test case, the parameters are located in the GTP Node and GTP sub-tabs on the General tab. When GGSN Node Emulation is enabled in the UMTS test case, the Gn tab is added to the test case.
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Gn Tab GTP Node Sub-tab |
GTP Sub-tab
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Measurements collected for Gn related processing are reported on the GTP report tab.
See Retries
See Retries
The amount of time, in minutes, between the periodic echo messages that are sent to the SGSN to detect path failures. Enter 0 to disable the echo messages.
Range: 0 — 65,535
Default: 0
Informs the SGSN of the IPv4 or IPv6 address of the charging gateway that collects CDRs for the PDP contexts. In the GGSN Node test case, you can include this information by checking the box and entering the address in the field provided. In the UMTS test case, the address is always sent unless you enter 0.0.0.0.
The Charging ID is used by the SGSN to identify all CDRs produced by a PDP context. The GGSN informs the SGSN of the ID to use for each context. The starting value is incremented for every PDP context serviced by the GGSN node.
Range: 0 — 429,496,295
Default: 1
Use the drop-down list to select the GTP version that will be supported by the GGSN node: version 1 or version 0. The appropriate parameters are enabled depending on the version that you select.
Options: 0 or 1
Default: 1
Use the drop-down list to select the number of secondary contexts to create for each primary context. Select 0 to disable secondary contexts.
Options: 0 — 10
Default: 0
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IMPORTANT:
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Use the checkbox to include a Teardown Indicator in the Delete PDP Context message.
When the Direct Tunnel Feature is enabled, this parameter sets the Error Indication Timer value in number of seconds.
Range: 0 — 4294967295
Default: 0
When the Direct Tunnel Feature is enabled, this parameter sets the Error Indication Packet Count value.
Range: 0 — 4294967295
Default: 0
When the Direct Tunnel Feature is enabled, use the checkbox to enable or disable One Shot Error Indication.
Range: N/A
Default: Enabled
Use the checkbox to include the Common Flags IE in messages sent to the SGSN. A value of 1 prohibits the SGSN from compressing user data payloads when requested to do so by the MN.
Range: 0 — 255
Default: 1
Use the checkbox to simulate the MN obtaining IP addresses from a DHCP server. A null IP address (0.0.0.0) will be returned in the Create PDP Context Response message sent to the SGSN. The GGSN node will then allocate an address from the pool defined in Starting PDP Contexts IP Addr Pool and send an Update PDP Context message, informing the SGSN of the PDP context's IP address.
The starting GTPC tunnel endpoint ID. This parameter is incremented for each GTP tunnel.
Range: 1 — 429496295
Default: 1000000
The starting GTPU tunnel endpoint ID. This parameter is incremented for each GTP tunnel.
Range: 1 — 429496295
Default: 2000000
Use the checkbox to include the optional APN Restriction information element messages sent by the GGSN node. It indicates the restriction level imposed on the PDP contexts associated with an APN. Define the Maximum APN Restriction used for all APNs in the field provided. Example:Example:
Range: 0 — 255
0 — No existing contexts or restrictions, all contexts are allowed to be created.
1 — Public-1 (e.g. WAP, MMS): contexts with restriction values 1-3 are allowed to be created.
2 — Public-2 (e.g. Internet, PSPDN): contexts with restriction values 1-2 are allowed to be created.
3 — Private-1 (Corporate): contexts with restriction value 1 are allowed to be created.
4 — Private-2 (Corporate): no contexts are allowed to be created.
Default: 0
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NOTE: Gn file settings include GTP PDP Address, which overrides Starting PDP Contexts IP Addr Pool on the General tab of the test case. |