Supported Platforms
Related Documentation
- M, MX, T Series
- Unified ISSU Support on MX Series 3D Universal Edge Routers in Unified ISSU System Requirements
- MX Series
- Verifying and Monitoring Subscriber Management Unified ISSU State
Subscriber Management Unified ISSU Support
The unified in-service software upgrade (unified ISSU) feature supports both the DHCP access model and the PPPoE access model used by subscriber management. This support ensures that the router preserves active DHCP and PPPoE subscriber sessions and session services after a unified ISSU has completed.
The Junos OS High Availability Configuration Guide describes the supported platforms and modules, CLI statements, and procedures you use to configure and initiate unified ISSU. You can use the issu flag with the traceoptions statement to trace subscriber management unified ISSU events. You can also use the show system subscriber-management summary command to display information about the unified ISSU state.
This overview describes specific considerations for unified ISSU support of the DHCP and PPPoE access models for subscriber management, and covers the following topics:
Unified ISSU Support for DHCP Access Model
Unified ISSU supports the subscriber management DHCP access model, which includes DHCP local server, DHCPv6 local server, DHCP relay, and DHCP relay proxy.
Accounting, filter, and class of service (CoS) statistics for DHCP subscribers are preserved after a unified ISSU on MPC/MIC interfaces on MX Series routers.
Unified ISSU Support for PPPoE Access Model
Unified ISSU supports the subscriber management PPPoE access model for static and dynamic PPPoE access, and includes the following features:
- Terminated, non-tunneled PPPoE connections configured with static or dynamic PPP logical interfaces and static or dynamic underlying interfaces
- Subscriber services on single-link PPP interfaces
- Preservation of statistics for accounting, filter, and
CoS on MPC/MIC interfaces
Accounting statistics for PPPoE subscribers are not preserved after a unified ISSU on Enhanced Intelligent Queuing 2 (IQ2E) PICs on M120 and M320 routers.
Unified ISSU for the subscriber management PPPoE access model does not support Multilink Point-to-Point Protocol (MLPPP) bundle interfaces. MLPPP bundle interfaces require the use of an Adaptive Services PIC or Multiservices PIC to provide PPP subscriber services. These PICs do not support unified ISSU.
Related Documentation
- M, MX, T Series
- Unified ISSU Support on MX Series 3D Universal Edge Routers in Unified ISSU System Requirements
- MX Series
- Verifying and Monitoring Subscriber Management Unified ISSU State
Published: 2013-02-11
Supported Platforms
Related Documentation
- M, MX, T Series
- Unified ISSU Support on MX Series 3D Universal Edge Routers in Unified ISSU System Requirements
- MX Series
- Verifying and Monitoring Subscriber Management Unified ISSU State
