Displaying the IGMP Local Multicast Forwarding Cache

To display the multicast forwarding cache information (IGMP only interfaces):

1. Select Local Multicast Forwarding Cache from the Routing > IGMP group on the Web Agent window. The Local Multicast Forwarding Cache dialog box opens.

Figure 12-28. Local Multicast Forwarding Cache Dialog Box

2. To modify the Local Multicast Forwarding Cache, select an entry and:
• Click Delete Entry to delete one or more entries.
• Click Flush Table to clear the entire table.
• Click REFRESH to receive the most up-to-date information on the entries in the table.
3. See Table 12-18 to review the IGMP Multicast Forwarding Cache information:

   Table 12-18. IGMP Local Multicast Forwarding Cache Parameters

   Parameters	Defines the...
   Destination Group Address	Destination group address of the multicast transmission.
   Source SubNetwork	Subnet on which the IGMP interface(s) exist.
   Source Address Mask	Subnet mask associated with the IGMP source subnetwork.
   Upstream Interface	IP interface configured on the upstream interface.
   Invalid Flows From Upstream	Number of invalid flows received from the upstream neighbor.
   Packets Forwarded Through Cache Entry	Number of packets successfully forwarded in the CPU (supervisor module).
   Downstream Interface(s)	Number of downstream interfaces and provides a link to the IGMP Downstream Interfaces dialog box.
   Upstream Source(s)	Number of upstream interfaces and provides a link to the IGMP Upstream Interfaces dialog box.