Web Agent Procedure

To display the multicast forwarding cache screen:

1. Select Multicast Forwarding Cache from the Routing > DVMRP group on the Web Agent window. The Multicast Forwarding Cache dialog box opens.(Figure 12-35)

Figure 12-35. Multicast Forwarding Cache Dialog Box

2. To modify the Multicast Forwarding Table:
• Select the 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 12-27 for an explanation of the Multicast Forwarding Cache dialog box parameters:

   Table 12-27. Multicast Forwarding Cache Dialog Box Parameters

   Parameter	Defines the...
   Select	Selection of the multicast forwarding cache.
   Destination Group Address	Destination group address of the multicast transmission.
   Source SubNetwork	Subnet from which the flow is coming.
   Source Address Mask	Subnet mask associated with the DVMRP source subnetwork.
   Upstream Interface	Local interface which is receiving this flow.
   Upstream Neighbor (Router) Address	IP address of the upstream neighbor (router).
   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) for this flow.
   Upstream Interface is Pruned	Router that is sending prunes to the upstream neighbor. Allows you to open the DVMRP Upstream Prune Information dialog box.
   Next Pruned Downstream Interface to Timeout	Next interface that is currently pruned which will be grafted back.
   Downstream Interface(s)	Number of downstream interfaces. Allows you to open the DVMRP Downstream Links dialog box.
   Upstream Source(s)	Number of upstream interfaces. Allows you to open the Upstream Sources dialog box.

4. Select the number in the Upstream Interface is Pruned field. The Upstream Prune Information dialog box opens.
5. See Table 12-28 for an explanation of the Upstream Prune Information dialog box parameters.s

   Table 12-28. Upstream Prune Information Dialog Box Parameter

   Parameter	Displays the...
   Destination Group Address	Destination group address of the multicast session.
   Source SubNetwork	Subnet on which the DVMRP interface exists.
   DVMRP Upstream Interface	Name of the upstream interface.
   Interface Type	The interface type. Types include: Broadcast - All traffic is forwarded through the routers. This is not a tunnel and does not require encapsulation. IPIP Tunnel - All multicast traffic (data and protocol messages) on this interface is encapsulated in IP unicast packets with the protocol set to IPIP (IP in IP). Non-Encapsulated Tunnel - All multicast data traffic on this interface is IPIP encapsulated, but the protocol messages are simple unicast.
   Interface is Pruned	Status of whether the interface has been pruned.
   Prune Expiration Time in sec	Time (in seconds) that the interface times out waiting for the prune message to expire.

6. Select the number in the Downstream Interface(s) field. The DVMRP Downstream Link(s) dialog box opens.
7. See Table 12-29 for an explanation of the DVMRP Downstream Links dialog box parameters.

   Table 12-29. DVMRP Downstream Links Dialog Box Parameters

   Parameter	Displays the...
   Destination Group Address	Destination group address.
   Source SubNetwork	Source subnetwork.
   DVMRP Downstream Interface	DVMRP Downstream interface.
   Interface Type	Interface type. Types include: Broadcast - All traffic is forwarded through the routers. This is not a tunnel and does not require encapsulation. IPIP Tunnel - All multicast traffic (data and protocol messages) on this interface is encapsulated in IP unicast packets with the protocol set to IPIP (IP in IP). Non-Encapsulated Tunnel - All multicast data traffic on this interface is IPIP encapsulated, but the protocol messages are simple unicast.
   Interface is Pruned	Status of whether the interface has been pruned.
   Prune Expiration in (sec)	Time (in seconds) that the interface times out waiting for the prune message to expire.

8. Select the number in the Upstream Source(s) field. The DVMRP Upstream Source(s) dialog box opens.
9. See Table 12-30 for an explanation of the DVMRP Upstream Source(s) dialog box parameters.

   Table 12-30. DVMRP Upstream Source(s) Dialog Box Parameters

   Parameter	Displays the...
   Destination Group Address	Destination group address for the upstream interface.
   Flow Source Address	Host source address for the upstream flow.
   Flow Upstream Interface	Name of the flow source interface.
   Payload Protocol Type	Protocol type for the payload.
   Source Port Number	Source port number.
   Destination Port Number	Destination port number.

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