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86 Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual
Using the Telnet Console
3. Highlight APPLY and press Enter.
Note: When IGMP is enabled on an interface, the switch IGMP snooping flag is set to Enabled and
becomes a read-only parameter.
DVMRP Interface Configuration
The Distance Vector Multicast Routing Protocol (DVMRP) is a hop-based method of building
multicast delivery trees from multicast sources to all nodes of a network. Because the delivery trees
are “pruned” and use the “shortest path,” DVMRP is relatively efficient. Because multicast group
membership information is forwarded by a distance-vector algorithm, propagation is slow.
DVMRP is optimized for high delay (high latency) and relatively low-bandwidth networks, and it
can be considered as a “best-effort” multicasting protocol.
To configure DVMRP for an IP interface
1. From the Main Menu, select Layer 3 - IP Networking Setup | DVMRP Interface
Configurations
and press Enter.
2. Configure these fields.
3. Highlight
APPLY and press Enter.
PIM-DM Interface Configurations
The Protocol Independent Multicast - Dense Mode (PIM-DM) protocol should be used in networks
with a low delay (low latency) and high bandwidth because PIM-DM is optimized to guarantee
delivery of multicast packets, not to reduce overhead.
To configure PIM-DM for an IP interface
1. From the Main Menu, select Layer 3 - IP Networking Setup | PIM-DM Interface
Configurations
and press Enter.
Field Description
Interface Name
Specifies the name of the interface to configure. This must be a previously
defined IP interface.
Neighbor Timeout Interval
Specifies the maximum interval the switch will wait to hear from a neighbor.
If this interval expires, the switch assumes that this neighbor is down. Enter
a value from 1—65535. The default is 35.
Probe Interval
Specifies the interval between probes. A probe is a query to other routers to
determine if a multicast group is present on a given router subnetwork.
Enter a value from 1—65535 seconds. The default is 10.
Metric
Specifies the cost for this path. The higher the assigned cost, the less likely
it is that multicast packets will be routed over this interface (provided that
other path options exist).
Enter a value between 1—31. The default is 1.
State Enables or disables DVMRP for this interface.