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To modify IGMP interfaces from the Web Agent:
Note: You must first enable "multicast protocol" on an interface before you can configure IGMP. See "Displaying Existing IP Interfaces" earlier in this chapter for more information on how to select a multicast protocol.
Figure�107:�IGMP Interfaces Web page
| Parameter |
Description |
|---|---|
| Select |
Select the interface to be modified. |
| Interface |
Displays the IP interface that is configured with IGMP. |
| IP Address |
Displays the IP address associated with this interface. Note: You cannot configure this field from the IGMP Configuration Web page. |
| IP Address Mask |
Displays the subnet mask associated with this interface. Note: You cannot configure this field from the IGMP Configuration Web page. |
| IGMP Version |
Select the IGMP Version (1.0 or 2.0) to be associated with the IGMP interface. |
| Maximum Groups |
Enter the number of IGMP Groups that can be active on this interface. The default setting is 32. The valid range for this field is 1 to 7,000. |
| Always be Group Membership Querier |
Version 1.0 - Select Enable to make this interface the designated querier. The default is Disable. Version 2.0 - Select Enable to force this interface to send queries. The default is Disable which tells the interface to obey the designated querier election. Note: Only the designated router will query hosts on your network. |
| Process Leave Packets |
turns off processing of IGMP leave messages when set to disable. The default value is Enable. |
| Query Request Interval in (sec) |
Enter a time period between queries. The valid range for this field is 1 to 65,535. The default setting is 125 seconds. |
| Query Response Interval in (sec) |
Enter a time (in seconds) to wait for a response from a host after a query is sent. If no response is received within this time, the host is removed from the group table. The valid range for this field is 1 to 25. The default setting is 10 seconds. |
| Neighbor Querier Timeout Interval in (sec) |
Enter a time (in seconds) this interface should wait after hearing a neighbor's query before assuming the role of querier, if not already the querier. If no query is received from a neighbor with a lower IP address in the allotted time, this interface becomes the querier (IGMP Version 2.0 only). The valid range for this field is 30-600. The default setting is 255 seconds. |
| Robustness Variable |
Modify this field for any 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 valid range for this field is 1 to 65,535. The default setting is 2. |
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