[AIX HP-UX Linux Solaris Windows]This topic applies only on the IBM i operating system.

SIP high availability

SIP uses the high availability features that are included in the product to offer a comprehensive high availability solution.

The following topics describe how high availability is implemented for this product.

SIP high availability architectural considerations

SIP proxy configuration considerations

Core groups and Distribution and Consistency Services (DCS)

A core group is a set of processes that handles high availability activities. Each core group has a coordinator function that manages all the singleton services running in the core group. Typical SIP deployments require only a single core group. For extremely large-scale deployments, such as 50 or more cell members, multiple core groups may be required.

The core group coordinator does the following:
  • Maintains all group information – group name, group members, the policy of the group, and the state of each group member
  • Assigns singleton service to group members and handles failover of singleton services.

For more information on core groups, see Core groups (high availability domains)

DCS failure detection

The Core group failure detection mechanisms and algorithms are documented in Core group discovery and failure detection protocols

DCS failure detection includes:
  • Active failure detection using a tunable heartbeat mechanism that monitors:
    • Time interval between heartbeats
    • Number of heartbeats lost before declaring failure
  • TCP KEEP_ALIVE / Sockets closing



Subtopics
[AIX Solaris HP-UX Linux Windows] [iSeries] SIP session affinity and failover
SIP cluster routing
SIP IP sprayer
Related tasks
Browse all SIP topics
[AIX Solaris HP-UX Linux Windows] [iSeries] Replicating SIP sessions
Upgrading SIP applications
Using Session Initiation Protocol to provide multimedia and interactive services
Concept topic    

Terms of Use | Feedback

Last updated: Oct 21, 2010 10:04:34 PM CDT
http://www14.software.ibm.com/webapp/wsbroker/redirect?version=compass&product=was-nd-mp&topic=csip_ha
File name: csip_ha.html