- Overview of ISG
- Configuring ISG Control Policies
- Configuring ISG Access for PPP Sessions
- Configuring ISG Access for IP Subscriber Sessions
- Configuring ISG IPv6 Support
- Configuring MQC Support for IP Sessions
- Configuring ISG Port-Bundle Host Key
- Configuring ISG as a RADIUS Proxy
- ISG RADIUS Proxy Support for Mobile Users: Hotspot Roaming and Accounting Start Filtering
- Walk-By User Support for PWLANs in ISG
- Configuring RADIUS-Based Policing
- Configuring Ambiguous VLAN support for IP sessions over ISG
- Configuring ISG Policies for Automatic Subscriber Logon
- Configuring DHCP Option 60 and Option 82 with VPN-ID Support for Transparent Automatic Logon
- Enabling ISG to Interact with External Policy Servers
- Configuring ISG Subscriber Services
- Configuring ISG Network Forwarding Policies
- Configuring ISG Accounting
- Configuring ISG Support for Prepaid Billing
- Configuring ISG Policies for Session Maintenance
- Redirecting Subscriber Traffic Using ISG Layer 4 Redirect
- Configuring Layer 4 Redirect Logging
- Configuring ISG Policies for Regulating Network Access
- Configuring ISG Integration with SCE
- Service Gateway Interface
- ISG MIB
- ISG SSO and ISSU Support
- Troubleshooting ISG with Session Monitoring and Distributed Conditional Debugging
- Configuring ISG Troubleshooting Enhancements
ISG SSO and ISSU
The SSO and ISSU feature for Intelligent Services Gateway (ISG) adds high availability (HA) support to ISG features.
- Finding Feature Information
- Prerequisites for ISG SSO and ISSU
- Information About ISG SSO and ISSU
- Additional References
- Feature Information for ISG SSO and ISSU
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Prerequisites for ISG SSO and ISSU
SSO and ISSU must be enabled on the ISG router. For configuration information, see the High Availability Configuration Guide, Cisco IOS XE Release 3S.
Information About ISG SSO and ISSU
High Availability for ISG Features
The SSO and ISSU feature provides high availability (HA) support for the following ISG features during a stateful switchover (SSO) or In Service Software Upgrade (ISSU) event:
Feature |
Description |
Configuration Information |
|---|---|---|
|
Absolute timeout (session timer) |
Timer is restarted on the new standby Route Processor (RP). During bulk synchronization to the standby RP, the remaining timeout duration is sent to the standby RP and used while the feature is being installed. |
“Configuring ISG Policies for Session Maintenance” module in this guide |
|
Idle timeout (connection timer) |
Timer is restarted on the new standby RP. |
“Configuring ISG Policies for Session Maintenance” module in this guide |
|
ISG accounting |
Cumulative counters and accounting ID are checkpointed to the standby RP. |
“Configuring ISG Accounting” module in this guide |
|
ISG policer (dynamic rate limiting) |
HA support was enabled for this feature. |
“Configuring MQC Support for IP Sessions” module in this guide |
|
Keepalive |
Associated timers are restarted after the control plane switchover. |
“Configuring ISG Policies for Session Maintenance” module in this guide |
|
Layer 4 redirect |
Layer 4 redirect includes the selected service group in its checkpoint data during the initial session and bulk synchronization. The standby RP uses the service group instead of selecting a new one. |
“Redirecting Subscriber Traffic Using ISG Layer 4 Redirect” module in this guide |
|
Port-bundle host key (PBHK) |
PBHK includes the allocated bundle ID in its checkpoint data during the initial session and bulk synchronization. Upon session replay, the standby RP reserves the bundle ID instead of allocating a new one. |
“Configuring ISG Port-Bundle Host Key” module in this guide |
|
Traffic classes |
ISG traffic classes are checkpointed to the standby RP and established during session replay. |
“Configuring ISG Subscriber Services” module in this guide |
Additional References
Related Documents
Related Topic |
Document Title |
|---|---|
|
Cisco IOS commands |
|
|
ISG commands |
|
|
HA commands |
|
|
HA configuration |
High Availability Configuration Guide, Cisco IOS XE Release 3S |
|
Configuring ISG accounting |
“Configuring ISG Accounting” module in this guide |
|
Configuring ISG timers |
“Configuring ISG Policies for Session Maintenance” module in this guide |
|
Configuring Layer 4 redirect |
“Redirecting Subscriber Traffic Using ISG Layer 4 Redirect” module in this guide |
|
Configuring port-bundle host key |
“Configuring ISG Port-Bundle Host Key” module in this guide |
|
Configuring traffic classes |
“Configuring ISG Subscriber Services” module in this guide |
Technical Assistance
Description |
Link |
|---|---|
|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for ISG SSO and ISSU
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.Feature Name |
Releases |
Feature Information |
|---|---|---|
|
ISG: Flow Control: SSO/ISSU |
Cisco IOS XE Release 3.5S |
|
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