3Com S7906E - Switch, Configuration Manual

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the packet, and forwards the request packet via unicast to the previous hop for the given multicast
source and group.
3) From the last-hop router to the multicast source, each hop adds a response data block to the end of
the request packet and unicasts it to the previous hop.
4) When the first-hop router receives the request packet, it changes the packet type to indicate a
response packet, and then sends the completed packet via unicast to the multicast traceroute
querier.
Configuration Task List
Complete these tasks to configure multicast routing and forwarding:
Task Remarks
Enabling IP Multicast Routing Optional
Configuring Multicast Static Routes Optional
Configuring a Multicast Routing Policy Optional
Configuring a Multicast Forwarding Range Optional
Configuring the Multicast Forwarding Table Size Optional
Configuring Static Multicast MAC Address Entries Optional
Configuring Multicast
Routing and Forwarding
Tracing a Multicast Path Optional
IP multicast does not support the use of secondary IP address segments. Namely, multicast can be
routed and forwarded only through primary IP addresses, rather than secondary addresses, even if
configured on interfaces.
For details about primary and secondary IP addresses, refer to IP Addressing Configuration in the IP
Services Volume .
Enabling IP Multicast Routing
Before configuring any Layer 3 multicast functionality, you must enable IP multicast routing.
Enabling IP multicast routing in the public instance
Follow these steps to enable IP multicast routing in the public instance:
To do... Use the command... Remarks
Enter system view system-view —
Enable IP multicast routing multicast routing-enable
Required
Disabled by default