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Viewing SGSN Service Properties
You can also view the following configuration details for SGSN service:
GPRS Mobility Management—GPRS Mobility Management (GMM) is a GPRS signaling protocol 
that handles mobility issues such as roaming, authentication, and selection of encryption algorithms. 
GPRS Mobility Management, together with Session Management (GMM/SM) protocol support the 
mobility of user terminal so that the SGSN can know the location of a mobile station (MS) at any 
time and to activate, modify and deactivate the PDP sessions required by the MS for the user data 
transfer. See GPRS Mobility Management Properties, page 27-37.
NRI Properties—The Network Resource Identifier (NRI) identifies the specific CN node of the pool. 
The UE derives the NRI from TMSI, P-TMSI, IMSI or IMEI. See NRI Properties, page 27-39.
Session Management Properties—The SGSN service performs comprehensive session management, 
including context activation, modification, deactivation, and preservation. It also provides support 
for IPv4, IPv6, and PPP PDP context types. In addition, the SGSNs intelligent PDP context 
preservation feature facilitates efficient radio resource utilization. See Session Management 
Properties, page 27-40.
GPRS Mobility Management Properties
To view the GPRS Mobility Management details:
Step 1Right-click the required device in the Vision client and choose Inventory.
Step 2In the Logical Inventory window, choose Logical Inventory > Context> Mobile > SGSN> GPRS 
Mobility Management. The GPRS mobility details are displayed in the content pane.
Table 27-20 describes the SGSN service details. Modify Interval SGSN service > Intervals Tab > 
Right-click the profile > 
Commands> ConfigurationUse this command to modify the interval 
details.
Modify NRI Values SGSN  service > right-click the 
NRI Values > Commands> 
ConfigurationUse this command to modify NRI value 
details.
Modify NRI 
PropertiesSGSN service > right-click the 
NRI Properties > Commands> 
ConfigurationUse this command to modify NRI property 
details.
Modify Target NRI SGSN service > Ta r g e t  N R I  Ta b  
> right-click the Ta r g e t  N R I  Ta b l e 
> Commands > Configuration Use this command to modify Target NRI 
details.
Delete Target NRIRight-click the SGSN service> 
Commands> ConfigurationUse this command to delete Target NRI 
details.
Table 27-19 SGSN Commands
Command Navigation Description 
						

							  
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Table 27-20 GPRS Mobility Management Details
Field Description
Max Identity Retries The maximum number of retransmissions allowed for identity requests. In 
other words, it relates to the number of retransmissions allowed before 
failure of the request. This number can be any value between 1 and 10.
Max  Page  Retries The maximum number of retransmissions allowed for page requests. In other 
words, it relates to the number of retransmissions allowed before failure of 
the request. This number can be any value between 1 and 5.
Max PTMSI Reloc 
RetriesThe maximum number of retransmissions allowed for P-TMSI relocation 
procedure. In other words, it relates to the number of retransmissions 
allowed before failure of the P-TMSI relocation procedure. This number can 
be any value between 1 and 10.
Perform Identity After 
AuthIndicates whether the SGSN service is allowed to perform an identity check 
to ascertain the IMSI after an authentication failure on a P-TMSI message.
TRAU Timeout The amount of time (in seconds) that the SGSN service must wait to purge 
the mobile stations data.This timer is started by the SGSN service after 
completion of the inter-SGSN RAU.
T3302 Timeout The amount of time (in minutes) the SGSN service must wait to attach the 
GPRS or RAU procedure on the mobile station node before retransmitting 
the message again. This time can be any value between 1 and 186.
T3312 Timeout The amount of time (in minutes) the SGSN service must wait to initiate the 
RAU procedure on the network before retransmitting the message again. 
This time can be any value between 1 and 186.
T3313 Timeout The amount of time (in seconds) the SGSN service must wait to initiate the 
GPRS on the network before retransmitting the message again. This time can 
be any value between 1 and 60.
T3322 Timeout The amount of time (in seconds) the SGSN service must wait to detach the 
GPRS on the network before retransmitting the message again. This time can 
be any value between 1 and 20.
T3350 Timeout The amount of time (in seconds) the SGSN service must wait to accept the 
GPRS attach request, RAU attach request, or reallocation request sent with 
the P-TSMI/TSMI on the network. This time can be any value between 1 and 
20.
T3360 Timeout The amount of time (in seconds) the SGSN service must wait to guard the 
authentication or cipher request on the network before retransmitting the 
message again. This time can be any value between 1 and 20.
T3370  Timeout The amount of time (in seconds) the SGSN service must wait for the identity 
request before retransmitting the message again. This time can be any value 
between 1 and 20.
Mobile Reachable 
TimeoutThe amount of time (in minutes) the SGSN service must wait to reach a 
mobile station on the network before retransmitting the message again. This 
time can be any value between 4 and 4400.
Implicit Detach 
TimeoutThe amount of time (in seconds) the SGSN service must wait for the implicit 
detach procedure on the network before retransmitting the message again. 
This time can be any value between 1 and 3600. 
						

							  
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GPRS Mobility Management Commands
The following GPRS mobility management commands can be launched from the logical inventory by 
clicking SGSN > Right-clicking on GPRS Mobility Management > Commands > Configuration. 
Your permissions determine whether you can run these commands (see Permissions Required to Perform 
Tasks Using the Prime Network Clients). To find out if a device supports these commands, see the Cisco 
Prime Network 4.3.2 Supported Cisco VNEs. 
NRI Properties
To view the NRI Properties for an SGSN service:
Step 1Right-click the required device in the Vision client and choose Inventory.
Step 2In the Logical Inventory window, choose Logical Inventory > Context> Mobile > SGSN> NRI 
Properties. The NRI properties are displayed in the content pane.
Table 27-22 describes the NRI Properties details. Purge Timeout The amount of time (in minutes) the SGSN service must wait to detach the 
mobility management context on the network before retransmitting the 
message again. This time can be any value between 1 and 20160.
Page Delta Timeout The page delta timeout associated with the SGSN service.
Table 27-20 GPRS Mobility Management Details (continued)
Field Description
Table 27-21 GPRS Mobility Management Commands
Command Navigation Description
Modify GPRS 
Mobility 
ManagementSGSN > Right-click on GPRS 
Mobility Management > 
Commands > ConfigurationUse this command to modify the GPRS 
mobility management details. 
						

							  
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Session Management Properties
To view the Session Management properties for an SGSN service:
Step 1Right-click the required device in the Vision client and choose Inventory.
Step 2In the Logical Inventory window, choose Logical Inventory > Context> Mobile > SGSN> Session 
Management Properties. The Session Management properties are displayed in the content pane.
Table 27-23 describes the Session Management Properties details.
Table 27-22 NRI Properties Details
Field Description
NRI Length The number of bits to be used in P-TMSI to define the NRI, which can be 
any number between 1 and 6. This length also determines the maximum size 
of the pool. If you do not configure a length for the NRI, then the default 
value of zero is considered to be the NRI’s length.
NRI Null Value The value of the null NRI, which is unique across all pool areas. If the NRI 
null value is 0, it indicates that the keyword is not used. Any value between 
1 and 63 is used to identify the SGSN service that is to be used for offloading 
procedure for SGSN pooling.
Non  Broadcast  MCC The country code of the mobile, which is basically the first part of the PLMN 
ID. This code can be any value between 100 and 999.
Non Broadcast MNC The network code portion of the PLMN ID. This code must be a 2 or 3 digit 
value between 1 and 999.
Non  Broadcast  LAC The location area code associated with an RNC. This code must be any value 
between 1 and 65535.
Non Broadcast RAC The remote area code associated with an RNC. This code can be any value 
between 1 and 255. 
						

							  
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Session Management Commands
The following Session Management commands can be launched from the logical inventory by clicking 
SGSN > Right-clicking on Session Management > Commands > Configuration. Your permissions 
determine whether you can run these commands (see Permissions Required to Perform Tasks Using the 
Prime Network Clients). To find out if a device supports these commands, see the Cisco Prime Network 
4.3.2 Supported Cisco VNEs. 
Monitoring the Iu PS Services
The Radio Network Controller (or RNC) is a governing element in the UMTS radio access network 
(UTRAN) and is responsible for controlling the Node Bs that are connected to it. This is the point where 
encryption is done before user data is sent to and from the mobile. 
Table 27-23 Session Management Properties Details
Field Description
Max Activate Retries The maximum number of retries to activate PDP context, which can be any 
value between 1 and 10.
Max Modify Retries The maximum number of retries to modify the PDP context, which can be 
any value between 1 and 10.
Max  Deactivate  Retries The maximum number of retries to deactivate PDP context, which can be any 
value between 1 and 10.
T3385 Timeout The amount of time (in seconds) to wait for a network initiated activate 
request before it is retransmitted again. This time can be any value between 
1 and 60.
T3386 Timeout The amount of time (in seconds) to wait for a network initiated modify 
request before it is retransmitted again. This time can be any value between 
1 and 60.
T3395 Timeout The amount of time (in seconds) to wait for a network initiated deactivate 
request before it is retransmitted again. This time can be any value between 
1 and 60.
Guard Timeout The amount of time (in seconds) for retransmission of a GUARD request, 
which can be any value between 1 and 60.
ARP RP Profile The status of the ARP packet (request or reply) associated with the SGSN 
service.
Table 27-24 Session Management Commands
Command Navigation Description
Modify Session 
ManagementSGSN > Right-click on Session 
Management > Commands > 
ConfigurationUse this command to modify the session 
management details. 
						

							  
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The RNC connects to the Circuit Switched Core Network through Media Gateway (MGW) and to the 
SGSN (Serving GPRS Support Node) in the Packet Switched Core Network. The interface between the 
RNC and the Circuit Switched Core Network (CS-CN) is called Iu-CS and between the RNC and the 
Packet Switched Core Network is called Iu-PS.
The Iu PS interface is very important in the UMTS network and it’s function include:
Radio Access Bearer (RAB) (wireless access bearing) establishment, maintenance and release 
process
Changing-over inside the system, changing-over between systems and Serving Radio Network 
Subsystem (SRNS) reorientation process
Community radio service process
Series of general process irrelevant with specific User Equipment (UE)
Specific signal management for users and separation process on protocol level for each UE
Transmission process of Network-attached storage (NAS) signal message between UE and CN
Location service requested from UTRAN to CN and transfer process of position information from 
UTRAN to CN and resources reserve mechanism
The Iu PS interface mainly analyzes the basic process of the application part of the wireless network, 
service process of mobility management, service process of conversation management, and statistical 
values of related Key Performance Indicators (KPI).
Figure 27-3 denotes the architecture of the Iu PS service.
Figure 27-3 Iu PS Service Architecture
To view the Iu PS configuration:
Step 1Right-click the required device in the Vision client and choose Inventory.
Step 2In the Logical Inventory window, choose Logical Inventory > Context> Mobile > Iu PS. The list of 
Iu PS Services are displayed in the content pane.
Step 3In the Iu PS section, double-click on an Iu PS service. The Iu PS service window is displayed.
Table 27-25 describes the Iu PS service properties. 
						

							  
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Table 27-25 Iu PS Service Properties
Field Description
Name The Iu PS service name.
Status The status of the Iu PS service, which can be any one of the following:
Initiated
Running
Down
Started
Not Started
PLMN ID The Public Land Mobile Network (PLMN) ID associated with the Iu PS 
service, which is basically a combination of the Mobile Country Code 
(MCC) and the Mobile Network Code (MNC).
Network Sharing Specifies whether network sharing is enabled or disabled.
DSCP Template Specifies the configuration of the Differentiated Services Code Point 
(DSCP) for the Iu PS service.
Iu Connection Hold Specifies whether the Iu connection hold is enabled or disabled.
By default, the Iu Connection is held only when requested by MS.
Iu Connection Hold 
TimerThe time required for the Iu connection hold.
Iu Release Complete 
TimerThe time interval (in seconds) for which the SGSN waits for Iu release to 
complete from RNC. The default value is 10 seconds.
Security Mode 
Complete TimerThe time interval (in seconds) for which the SGSN waits for security mode 
to complete from MS.
Follow-on for Service 
RequestIu established as the result of a Service Request (signaling), the SGSN, by 
default, waits for the Iu Hold Timer to expire.
The service request can be enabled or disabled.
SGSN Initiated Reset  Specifies whether the SGSN RESET procedure initiation is enabled or 
disabled.
Reset Ack Timer  Specifies the time interval (in seconds) for which the SGSN waits for reset 
acknowledgment (RESET-ACK) from the RNC.
Reset Maximum 
RetransmissionsSpecifies the maximum retries for the RESET message.
Reset Guard Timer Specifies the time interval (in seconds) after which the SGSN sends reset 
acknowledgment (RESET-ACK) to the RNC.
Tin-Tc  Timer Specifies the Tin-Tc time interval (in seconds). SGSN decrements the traffic 
level of the RNC by one after Tin-Tc interval. The default value is 30 
seconds.
Tig-Oc Timer Specifies the Tig-Oc time interval (in seconds). SGSN ignores any overload 
messages for Tig-Oc interval after one overload message. The default value 
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Step 4In the Iu PS section, double-click on a GTPU Header. The GTPU Header window is displayed. RAB Assig Response 
TimerThe time required to complete the RAB assignment procedure.
SRNS Ctx Response 
TimerThe time required to wait for a response to the SRNS context request 
message.
Relocation Complete 
TimerThe total time required to wait for a response from the relocation request 
message.
Relocation Alloc Timer The allocated time required to wait for a response for the relocation request 
message.
Consecutive sec-fail 
local messagesSpecifies whether intra RAU, service request, or detach requests from local 
PTMSI is enabled or disabled.
Consecutive sec-fail 
Non-Local messagesSpecifies whether attaches, inter-rat, inter-service RAU is enabled or 
disabled.
Consecutive sec-fail 
local messages countSpecifies the number of intra RAU, service request, or detach requests from 
local PTMSI.
Consecutive sec-fail 
Non-Local messages 
countSpecifies the number of attaches, inter-rat, and inter-service RAU.
Security failure during 
inter-sgsn-rauSpecifies the inter SGSN routing area update status.
Enabled or disabled.
MBMS Broadcast mode Specifies the Multimedia Broadcast Service status.
Enabled or disabled.
MBMS Multicast mode  Specifies the Multimedia Multicast Service status.
Enabled or disabled.
Empty-CR Procedure Specifies whether the empty CR procedure is rejected or continued.
Loss of Radio Coverage 
Detection Cause in Iu 
ReleaseSpecifies the detection cause number, which will be included in the Iu 
Release message.The detection cause number identifies the reason for loss 
of radio coverage (LORC).
RAI validation in 
AttachSpecifies whether check is done as per 3GPP for MCC or MNC fields of 
earlier RAI IE in Attach or RAU.
Source-RNC as 
Ta r g e t - R N CEnables source RNC to be used as target RNS during intra-srns.
Network-sharing 
Failure-codeConfigures the reject cause code to be included in network sharing Reject 
messages.
Check CS/PS 
Co-ordinationEnables or disables the SGSN service to perform a CS-PS coordination 
check.
Non-shared Support Specifies if non-shared area access is Enabled or Disabled. This applies 
when network-sharing is enabled.
Use Old Location in 
SCDR and ULIDisplays old value of LAC/RAC/SAC for SCDRs and ULI information to 
GGSN during intra SRNS procedure.
Table 27-25 Iu PS Service Properties
Field Description 
						

							  
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Table 27-26 describes the GTPU header properties.
Step 5In the RNCs section, double-click on an RNC ID. The Radio Network Controller Properties window 
is displayed.
Table 27-27 describes the RNC properties.
Table 27-26 GTPU Header Properties
Field Description
GTP-U Bind Address Binds Iu PS service GTPU endpoint to IP address.
GTP-U Echo Specifies whether the GTPU echo is enabled or disabled. By default, it is 
disabled.
GTP-U Echo Interval Specifies the echo interval (in seconds) for GTPU. Default is disabled.
GTP-U Max Retries Specifies the maximum number of transmission retries for GTPU packets.
GTP-U Retransmission 
TimeoutSpecifies the retransmission timeout of GTPU packets, in seconds, ranging 
from 1 to 20. The default value is 5 seconds.
GTP-U Sync Echo with 
PeerRestarts path management when echo request from peer is received.
GTPU Address 
Blacklisting Specifies if the GTPU bind address is enabled or disabled.
The GTPU bind address (loopback address) will not be used (is blacklisted) 
in RAB-Assignment requests after a RAB assignment request, with that 
GTP-U bind address, has been rejected by an RNC with the cause - 
Unspecified Error. This is a failure at the RNCs GTP-U IP interface.
GTPU Address 
Blacklist TimerSpecifies the time period that a GTP-U bind address (loopback address) will 
not be used (is blacklisted) in RAB-Assignment requests after a RAB 
assignment request, with that GTP-U bind address, has been rejected by an 
RNC with the cause.
Table 27-27 Radio Network Controller Properties
Field Description
ID The unique code of the RNC configuration, which can be any value between 
0 and 65535.
Status The status of the RNC configuration, which can be any one of the following:
Initiated
Running
Down
Started
Not Started 
						

							  
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Step 6In the RNCs section, choose RNC ID > General Characteristics. The RNC General Characteristics 
window is displayed. 
Table 27-28 describes the RNC general characteristics. PLMN ID The PLMN ID associated to the RNC configuration.
NoteAll the RNCs associated with an Iu PS service will be assigned the 
same PLMN ID.
Location and Routing Area Codes 
LAC The Location Area Code applicable to the RNC.
NoteThe area covered by the PLMN ID is divided into different location 
areas. Each location area is identified by a unique identifier called 
the Location Area Identity, which is internationally used for 
updating location of mobile subscribers.
RACs The Routing Area Code applicable to the RNC, which is used to identify a 
routing area within a location area. 
Table 27-27 Radio Network Controller Properties (continued)
Field Description
Table 27-28 RNC General Characteristics
Field Description
State State of the RNC. 
Up or Down.
ss7-point-code The SS7 point code in dotted-decimal notation or decimal format.
RNC Description The description provided for the RNC.
Non-search-ind IE in 
PagingInclude the non-searching-indication flag in the page-request message.
Direct Tunnel Restricted or not restricted. 
Direct Tunnel allows RNC to send data directly to GGSN and also from 
GGSN to the RNC.
Rab Modify Procedure Specifies the type of modification procedure to be used to establish the radio 
access bearer (RAB) assignment.
Rab Asymmetry 
IndicatorSpecifies the RAB asymmetry indicator set in RAB assignment request.
For example, Force Asymmetric Bidirectional for Symmetric Bidirectional.
Max IuConId per msg The Iu-ConIds to be sent in reset resource.