Cisco Cisco ASR 5000
Serving Gateway Overview
▀ Features and Functionality - Base Software
▄ S-GW Administration Guide, StarOS Release 18
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The S-GW stores the ULI and also reports the information to the accounting framework. This may lead to generation of
Gz and Rf Interim records. The S-GW also forwards the received ULI to the P-GW. If the S-GW receives the UE time
zone IE from the MME, it forwards this IE towards the P-GW across the S5/S8 interface.
Gz and Rf Interim records. The S-GW also forwards the received ULI to the P-GW. If the S-GW receives the UE time
zone IE from the MME, it forwards this IE towards the P-GW across the S5/S8 interface.
Management System Overview
The system's management capabilities are designed around the Telecommunications Management Network (TMN)
model for management - focusing on providing superior quality Network Element (NE) and element management
system (EMS) functions. The system provides element management applications that can easily be integrated, using
standards-based protocols (CORBA and SNMPv1, v2), into higher-level management systems - giving wireless
operators the ability to integrate the system into their overall network, service, and business management systems. In
addition, all management is performed out-of-band for security and to maintain system performance.
model for management - focusing on providing superior quality Network Element (NE) and element management
system (EMS) functions. The system provides element management applications that can easily be integrated, using
standards-based protocols (CORBA and SNMPv1, v2), into higher-level management systems - giving wireless
operators the ability to integrate the system into their overall network, service, and business management systems. In
addition, all management is performed out-of-band for security and to maintain system performance.
Cisco's O+M module offers comprehensive management capabilities to the operators and enables them to operate the
system more efficiently. There are multiple ways to manage the system either locally or remotely using its out -of-band
management interfaces.
These include:
system more efficiently. There are multiple ways to manage the system either locally or remotely using its out -of-band
management interfaces.
These include:
Using the Command Line Interface (CLI)
Remote login using Telnet, and Secure Shell (SSH) access to CLI through SPIO card's Ethernet management
interfaces
Local login through the console port on the SPIO card via an RS-232 serial connection
Supports communications through 10 Base-T, 100 Base-TX, 1000 Base-TX, or
1000Base-SX (optical gigabit Ethernet) Ethernet management interfaces on the SPIO
Client-Server model supports any browser (such as, Microsoft Internet Explorer v6.0 and above or others)
Supports Common Object Request Broker Architecture (CORBA) protocol and Simple Network Management
Protocol version 1 (SNMPv1) for fault management
Provides complete Fault, Configuration, Accounting, Performance, and Security (FCAPS) capabilities
Can be easily integrated with higher-level network, service, and business layer applications using the Object
Management Group's (OMG’s) Interface Definition Language (IDL)
Important:
P-GW management functionality is enabled by default for console-based access.
Important:
For more information on command line interface based management, refer to the Command Line
Interface Reference and P-GW Administration Guide.
MME Restoration Support
MME restoration is a 3GPP specification-based feature designed to gracefully handle the sessions at S-GW once S-GW
detects that the MME has failed or restarted. If the S-GW detects an MME failure based on a different restart counter in
the Recovery IE in any GTP Signaling message or Echo Request / Response, it will terminate sessions and not maintain
any PDN connections.
detects that the MME has failed or restarted. If the S-GW detects an MME failure based on a different restart counter in
the Recovery IE in any GTP Signaling message or Echo Request / Response, it will terminate sessions and not maintain
any PDN connections.
As a part of this feature, if a S-GW detects that a MME or S4-SGSN has restarted, instead of removing all the resources
associated with the peer node, the S-GW shall maintain the PDN connection table data and MM bearer contexts for
associated with the peer node, the S-GW shall maintain the PDN connection table data and MM bearer contexts for