HP VPN Firewall Appliances Network Management Configuration Guide

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Configuring multicast routing and forwarding
Overview
In multicast implementations, the following types of tables implement multicast routing and forwarding:
• Multicast routing table of a multicast routing protocol—Each multicast routing protocol has its own
multicast routing table, such as the PIM routing table.
• General multicast routing table—The multicast routing information of different multicast routing
protocols forms a general multicast routing table.
• Multicast forwarding table—The multicast forwarding table helps guide the forwarding of multicast
packets.
A multicast routing table consists of a set of (S, G) entries. Each entry contains the routing information for
delivering multicast data from a multicast source to a multicast group. If a router supports multiple
multicast protocols, its multicast routing table contains all routes generated by multiple protocols. The
router chooses the optimal route from the multicast routing table based on the configured multicast
routing and forwarding policy and adds the route entry to its multicast forwarding table.
The term "router" in this document refers to both routers and routing-capable firewalls.
Configuring multicast routing and forwarding in the
Web interface
Enabling multicast routing
Multicast routing must be enabled before other Layer 3 multicast functions can take effect. By default,
multicast routing is disabled.
To enable multicast routing:
1. From the navigation tree, select Network > Routing Management > Multicast Routing.
2. The global configuration page appears.
Figure 322 Global configuration page
3. Select Enable from the list.
4. Click Apply.