Configuration Task List - HP A8800 Configuration Manual

Introduction to multicast traceroute packets
A multicast traceroute packet is a special IGMP packet, which differs from common IGMP packets in that
its IGMP Type field is set to 0x1F or 0x1E and that its destination IP address is a unicast address. There
are three types of multicast traceroute packets:
• Query, with the IGMP Type field set to 0x1F.
Request, with the IGMP Type field set to 0x1F.
•
Response, with the IGMP Type field set to 0x1E.
•
Process of multicast traceroute
1. The querier sends a query to the last-hop router.
2. Upon receiving the query, the last-hop router turns the query packet into a request packet by
adding a response data block containing its interface addresses and packet statistics to the end of
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

Task
Enabling IP multicast routing
Configuring multicast routing
and forwarding
For the configuration tasks in this section:
The device can route and forward multicast data only through the primary IP addresses of interfaces,
rather than their secondary addresses or unnumbered IP addresses. For more information about primary
and secondary IP addresses, and IP unnumbered, see Layer 3—IP Services Configuration Guide.
Enabling IP multicast routing
Before configuring any Layer 3 multicast functionality, you must enable IP multicast routing.
Enabling IP multicast routing on the public network
Configuring static multicast routes
Configuring a multicast routing policy
Configuring a multicast forwarding range
Configuring the multicast forwarding table size
Configuring RPF check failure processing
Tracing a multicast path
66
Remarks
Required.
Optional.
Optional.
Optional.
Optional.
Optional.
Optional.