Web Agent Procedure

To display the IGMP Interface Statistics window using the Web Agent:

1. Select Interface Statistics from the Routing > IGMP > group on the Web Agent window. The IGMP Interface Statistics dialog box opens (Figure 12-26).

Figure 12-26. IGMP Interface Statistics Dialog Box

2. To modify the interface statistics, perform one of the following:
• Select one or more interfaces, and then click CLEAR to reset statistics on those interfaces to zero.
• Click CLEAR ALL to reset all statistics to zero.
• Click REFRESH to view the latest interface statistics.
3. See Table 12-16 for an explanation of the IGMP Interface Statistics dialog box parameters:

   Table 12-16. IGMP Interface Statistics Dialog Box Parameters

   Parameter	Defines the...
   IGMP Interface	IP interface for these statistics.
   IP Address	IP address associated with the interface.
   IP Address Mask	Subnet mask associated with each listed interface.
   State	Current state of the interface. For example, if the interface is enabled and operating properly, UP is displayed.
   IGMP Version	Version of IGMP enabled on each interface.The default version is V2
   This Router is Group Membership Querier	Router that was configured or elected to be the designated group membership querier. The switch queries hosts on each interface only when it is acting as the designated querier on that interface.
   Robustness Variable	Setting for the expected packet loss on a subnet. If a subnet is expected to have more packet loss, the Robustness Variable should be increased. The Robustness Variable must not be set to 0 and should not be set to 1. The default value is 2
   Next Query Request (sec)	Remaining amount of time (in seconds) before the next group membership query is transmitted.
   Neighbor Querier Timeout (sec)	Amount of time (in seconds) remaining before this interface assumes the role of designated querier. This timer is reset to the value entered for the Neighbor Querier Timeout Interval each time an IGMP query is received from a neighbor with a lower IP address. If no response is received in the allowed time, the switch will become the designated querier on this interface. Applicable only if IGMP V2 is used.
   Group Join Requests Received	Number of new groups on this interface.
   Group Leave Requests Received	Number of leave requests received on this interface.
   Group Reports Received	Number of reports received on this interface in response to a group membership query. Hosts respond to a Query by generating Host Membership Reports reporting each host group to which they belong on the network interface from which the Query was received.
   Query Messages Received	Number of query messages received from other multicast routers.
   Query Messages Transmitted	Number of query messages sent by a multicast router. These messages are sent to discover which host groups have members on their attached local networks. Queries are addressed to the all-hosts group (address 224.0.0.1), and carry an IP time-to-live of 1.
   Unknown Messages Received	IGMP messages received with an unsupported type.
   Number of Current Groups	Number of groups on each interface for which there are entries in the Group Membership Table.