Configuring Dvmrp; Figure 25-2 Dvmrp; Table 25-1 Dvmrp - ZyXEL Communications Dimension ES-4024 User Manual

Dimension ES-4024 Ethernet Switch
25.2.1 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.

25.3 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.
The following table describes the labels in this screen.
LABEL
Active Select Active to enable DVMRP on the switch. You should do this if you want the switch to act as a
multicast router.
Index Index is the DVMRP configuration for the IP routing domain defined under Network. The maximum
number of DVMRP configurations allowed is the maximum number of IP routing domains allowed on
the switch. See the IP Setup chapter for more information on IP routing domains.
Network This is the IP routing domain IP address and subnet mask you set up in IP Setup.
VID DVMRP cannot be enabled on the same VLAN group across different IP routing domains, that is,
you cannot have duplicate VIDs for different DVMRP configurations (see Figure 25-5).
Active Select Active to enable DVMRP on this IP routing domain.
Threshold Threshold is the maximum time to live (TTL) value. TTL is used to limit the scope of multicasting.
You should reduce this value if you do not wish to flood Layer 3 devices many hops away with
multicast traffic. This applies only to multicast traffic this switch sends out.
Apply Click Apply to save these changes to the switch.
25-2

Figure 25-2 DVMRP

Table 25-1 DVMRP

DESCRIPTION
DVMRP