|
|
|
At the core of all Intelligent Multicast functionality, the Administration Process is manipulated by manual configuration and dynamic configuration, and implements a pruning function. In a dynamically configured environment, the Administration Process takes the information from the Learning Process (from IGMP Snooping) or from one of the clients in the Dissemination Process and creates the AFT table entries which will perform the actual Intelligent Multicast functionality on the local switch. It also passes the new information to the servers in the Dissemination Process for distribution to other switches in the same VLAN.
The Administration Process views all data inputs as applications. Manual configuration is the MGMT (management) application, IGMP Snooping is the IGMP application, the LGMP client is the LGMP application, and the CGMP snooper is the CGMP application.
The pruning functionality of the Administration Process is a cleanup facility that prevents stale information from existing in the Intelligent Multicast tables in the event an application fails to perform its own cleanup. There are three types of pruning, each with their own timers: session, client port, and router port.
Automatic Session Pruning, if enabled, will remove a session if that session has not been active for Session Pruning Time.
Automatic Client Port Pruning, if enabled, will remove a client port from a session if no IGMP reports have been received on that port for that session in the time specified.
Note: By enabling Automatic Client Port Pruning, there is a chance that the switch may disrupt multicast service temporarily to clients requesting to receive that multicast traffic. This is because of the report suppression mechanism in IGMP v1 and v2.
Automatic Router Port pruning, if enabled, will prune quiet router ports. If the switch has not been notified that there is a router on the port in Router Pruning Time, then the router port is removed.
|
|
|