D-Link DGS-3630 User Manual 1 - Page 330

DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide After clicking the Edit button, the following page will appear. Figure 6-110 PIM Interface (Edit) Window The fields that can be configured are described below: Parameter PIM State Mode Description Select to enable or disable the PIM state on this interface here. Select the PIM mode here. Options to choose from are Dense Mode, Sparse Mode, and Sparse-Dense Mode. • Dense Mode - PIM-DM assumes that when a source starts sending, all downstream routers wants to receive the multicast data stream. Initially multicast data stream are flooded to all downstream routers and the interfaces that have group members. If there are no downstream routers or group members, the router will send prune message to indicate that the multicast data stream is not desired. • Sparse Mode - When multicast traffic is received on a sparse mode interface, the first hop router will encapsulate and send the register message to RP. If the router is not the first hop router, the traffic will be forwarded based on the mroute entry. A sparse mode interface will only be populated as mroute member interface if receive join message from the downstream router or if group member on a sparse mode interface, PIM join process will be triggered to create the shared tree or the source tree. • Sparse-Dense Mode - When interface is configured as PIM SparseDense mode, a multicast group received by the interface can operate in either sparse mode or dense mode of operation. When the interface receives multicast traffic, if there is a known RP for the group, then this group will operate in sparse mode, otherwise this multicast group will operate in dense mode. PIM Passive Query Interval Select to enable or disable the PIM passive feature here. When the passive mode is enabled, the interface will neither send PIM messages out nor accept PIM messages from this interface. The router will act as if it is the only PIM router on the network. Use this feature only when there is only one PIM router on the LAN. Enter the interval at which hello messages are sent here. The range is from 1 to 18724 seconds. A PIMv2 router learns PIM neighbors via the PIM hello message. This feature configures the frequency of the hello message. Routers configured for IP multicasting send PIM hello messages to detect PIM routers. For SM, hello messages also determine the router to act as the designated router for each LAN segment. The configured query interval is also used as the value for hold time. By configuring a smaller period for the interval, the 318