Chapter 20
| Multicast Routing
Configuring Global Settings for Multicast Routing
– 757 –
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SPT-bit set – Multicast packets have been received from a source on
shortest path tree.
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Join SPT – The rate of traffic arriving over the shared tree has exceeded the
SPT-threshold for this group. If the SPT flag is set for (*,G) entries, the next
(S,G) packet received will cause the router to join the shortest path tree. If
the SPT flag is set for (S,G), the router immediately joins the shortest path
tree.
Downstream Interface List –
◆ Interface – Interface(s) on which multicast subscribers have been recorded.
◆ State – The flags associated with each downstream interface indicate:
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Forward – Traffic received from the upstream interface is being forwarded
to this interface.
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Local – Downstream interface has received IGMP report message from host
in this subnet.
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Pruned – This route has been terminated.
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Registering - A downstream device is registering for a multicast source.
Web Interface (IPv4)
To display the multicast routing table:
1. Click Multicast, Multicast Routing, Information.
2. Select Show Summary from the Action List.
Figure 518: Displaying the IPv4 Multicast Routing Table
To display detailed information on a specific flow in multicast routing table:
1. Click Multicast, Multicast Routing, Information.
2. Select Show Details from the Action List.
3. Select a Group Address.
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