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IGMP is set on a single port or VLAN. In order for IGMP parameters to take effect, DVMRP must be enabled globally and on the particular interface.
Use the Globals tab to set DVMRP global parameters.
To enable DVMRP globally:
| The DVMRP dialog box opens with the Globals tab displayed. |
The table below describes the Globals tab items.
Enable
Enables (true) or disables (false) DRMRP on the routing switch. You must globally enable DVMRP before you can enable port or VLAN DVMRP.
UpdateInterval
Periodically each multicast router advertises routing information on each DVMRP interface, using the DVMRP export message. You can specify the time interval (in seconds) between DMVRP updates. The range is from 10 to 2000 with a default of 60.
TriggeredUpdateInterval
Triggered updates are sent when routing information changes. This value is the amount of time (in seconds) between triggered update messages. The range is from 5 to 1000 with a default value of 5.
LeafTimeOut
When DVMRP advertises a route on an interface, it waits a period of time for a DVMRP neighbor to respond positively. If no neighbor responds in the given time, the router considers the network attached to the interface a leaf network. The leaf timer allows you to specify how long (in seconds) the router waits for a response from a neighbor. The range is from 25 to 4000 with a default value of 200.
NbrTimeOut
The neighbor report timer specifies how long (in seconds) the router waits to receive a report from a neighbor before considering the connection inactive. The range is from 35 to 8000 with a default of 140.
NbrProbeInterval
Specifies how often the DVMRP router sends probe messages on its interfaces. The range is 5 to 30 seconds with a default of 10.
VersionString
The router's DVMRP version information.
GenerationId
Used by neighboring routers to detect whether a reset or disable/enable DVMRP action has occurred to the switch or to a particular interface. If so, the router should resend the entire multicast routing table to its neighbor immediately instead of waiting for the next scheduled update.
NumRoutes
The number of entries in the routing table. Use this
information to monitor the routing table size to detect illegal advertisements of multicast routes.
ReachableRoutes
The number of entries in the routing table with noninfinite metrics. Use this number to detect network partitions by observing the ratio of reachable routes to total routes.
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