148 Chapter 6 Using Multicast Manager208963-BInterface tabThe DVMRP Interface tab (Figure 70) displays information about the interfaceswith DVMRP enabled.TriggeredUpdateIntervalTriggered updates are sent when routing informationchanges. This value is the amount of time (in seconds)between triggered update messages. The range is from 5to 1000 with a default value of 5. In DVMRPv3, thisvariable is also known as the Minimum Flash UpdateInterval.LeafTimeOut When DVMRP advertises a route on an interface, it waits aperiod of time for a DVMRP neighbor to respond positively.If no neighbor responds in the given time, the routerconsiders the network attached to the interface to be a leafnetwork. The leaf timer shows you how long (in seconds)the router waits for a response from a neighbor. The rangeis 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 beforeconsidering the connection inactive. The range is from 35to 8000 with a default of 140.NbrProbeInterval How often the DVMRP router sends probe messages on itsinterfaces. The range is 5 to 30 seconds with a defaultof 10.VersionString The router’s DVMRP version information.GenerationId Used by neighboring routers to detect whether a reset ordisable/enable DVMRP action has occurred to the switchor to a particular interface. If so, the router resends theentire multicast routing table to its neighbor immediately,instead of waiting for the next scheduled update.NumRoutes Number of entries in the routing table. You can use thisinformation to monitor the routing table size to detect illegaladvertisements of multicast routes.ReachableRoutes Number of entries in the routing table with noninfinitemetrics. You can use this number to detect networkpartitions by observing the ratio of reachable routes to totalroutes.Table 47 Globals tab fields (continued)Field Description
