You can use the BIG-IP® system as a Session Initiation Protocol (SIP) proxy. When the BIG-IP system is placed between your SIP routers, session border controllers, and soft switches, you can configure the system to route and load balance SIP messages across the servers on your SIP network.
This graphic illustrates the relationships of the configuration objects that you must configure on the BIG-IP system.
SIP proxy configuration objects
|Call-ID||The system uses the value in the Call-ID header field in the SIP message.|
|Custom||The system uses the value of a custom key specified in an iRule.|
|Src-Addr||The system uses the originating IP address in the SIP message.|
|Session||Persistence is enabled.|
|None||Persistence is disabled.|
|Per Blade||The number of connections to this peer is per blade on a VIPRION system.|
|Per Peer||The number of connections to this peer is per peer.|
|Per TMM||The number of connections to this peer is per TMM on the BIG-IP system.|
|Per Client||The number of connections to a remote host is per client connection.|
|Ratio||Peer selection is based on the ratio that is set for each peer in the Selected list.|
|Sequential||Peer selection is based on the order of the peers in the Selected list.|
This table names and describes the objects necessary to configure the BIG-IP system as a SIP proxy.
|Session Profile||Defines how BIG-IP processes SIP messages, including the data used to persist SIP connections.|
|Transport config||Defines how BIG-IP connects with the servers on your SIP network.|
|Pool||Defines how BIG-IP load balances connections across a group of servers.|
|Peer||Defines how BIG-IP connects with the servers on your network and to which servers the system routes and load balances SIP messages.|
|Static route||Defines how BIG-IP routes SIP messages.|
|Router profile||Defines an instance of a SIP router.|
|Virtual Server||Defines the destinations in your network, including the servers that process incoming SIP requests and the pool members that process connections between BIG-IP and your SIP network.|
You can configure the BIG-IP® system to monitor pool member health using a SIP monitor. Use a SIP monitor to check the health of a host with an active SIP session. The SIP monitor also monitors a SIP connection independent of a specific SIP session and marks a host that had been marked down, but is online again, as available.
Perform these tasks to configure health monitors and apply the monitors to a pool:
You can view statistics for SIP sessions and routes.