ZyXEL Communications XGS-4526 - Manual (Page 304)

Chapter 34 DVMRP
XGS-4526 User’s Guide
304
4
The final multicast (“M”) after pruning and grafting is shown in the next figure.
Figure 159 How DVMRP Works
34.2.1 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.
34.3 Configuring DVMRP
Configure DVMRP on the Switch when you wish it to act as a multicast router
(“mrouter”). Click IP Application > DVMRP in the navigation panel to display
the screen as shown.
Figure 160 IP Application > DVMRP
The following table describes the labels in this screen.