ZyXEL Communications ES-2024 Series Betriebsanweisung Seite 165

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ES-4024A User’s Guide
164 Chapter 27 DVMRP
Figure 94 How DVMRP Works
27.2.1 DVMRP Terminology
DVMRP probes are used to discover other DVMRP Neighbors on a network.
DVMRP reports are used to exchange DVMRP source routing information. These packets are
used to build the DVMRP multicast routing table that is used to build source trees and also
perform Reverse Path Forwarding (RPF) checks on incoming multicast packets. RPF checks
prevent duplicate packets being filtered when loops exist in the network topology.
DVMRP prunes trim the multicast delivery tree(s). DVMRP grafts attach a branch back onto
the multicast delivery tree.
27.3 Configuring DVMRP
Configure DVMRP on the switch when you wish it to act as a multicast router (“mrouter”).
Click Routing Protocol, DVMRP in the navigation panel to display the screen as shown.
Figure 95 DVMRP
The following table describes the labels in this screen.
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