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| Chapter 6 Using Multicast Manager 143 |
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| Table 45 Interface tab fields | |
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| Field | Description |
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| Interface | Interface on which IGMP is enabled. |
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| QueryInterval(sec) | Frequency (in seconds) at which IGMP host query packets |
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| are transmitted on the interface. The range is from 1 to |
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| 65535. The default is 125. |
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| Status | IGMP row status. When an interface has been assigned an |
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| IP address and DVMRP is enabled, status is shown as |
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| active. Otherwise, it is shown as notInService. |
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| Version | Version of IGMP that is configured on the interface. For |
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| IGMP to function correctly, all routers on a LAN must be |
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| configured to run the same version of IGMP on that LAN. |
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| Querier | Address of the IGMP querier on the IP subnet to which the |
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| interface is attached. |
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| QueryMax | Maximum response time (in seconds) advertised in |
| ResponseTime(sec) | IGMPv2 general queries on this interface. Smaller values |
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| allow a router to prune groups faster. This value for |
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| IGMPv1 is not configurable and has a default value of 10 |
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| seconds. |
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| WrongVersion | Number of queries received with an IGMP version that |
| Queries | does not match the interface. IGMP requires that all routers |
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| on a LAN be configured to run the same version of IGMP. If |
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| any queries are received with the wrong version, it |
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| indicates a version mismatch. |
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| Joins | Number of times a group membership has been added on |
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| this interface; that is, the number of times an entry for this |
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| interface has been added to the cache table. This number |
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| gives an indication of the amount of IGMP activity over |
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| time. |
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| Robustness | This value is equal to the number of expected query packet |
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| losses per serial query interval, plus 1. If a network is |
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| expected to lose query packets, increase the robustness |
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| value. The range is from 2 to 255 with a default value of 2. |
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| The default value of 2 means that one query per query |
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| interval may be dropped without the querier aging out. |
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| LastMemQueryIntval | Maximum response time inserted into |
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| queries sent in response to leave group messages; also |
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| the time between |
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| Increasing this parameter increases the time before aging |
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| hosts on the network. It also increases the number of |
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| retransmits of |
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| to 255. The default value is 1. |
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Using Optivity Switch Manager, Release 1.1.0.0
