Configuring Ip Multicast Routing; Default Multicast Routing Configuration - Cisco 3845 - Security Bundle Router Software Manual

Configuring IP Multicast Routing

PIM uses both source trees and RP-rooted shared trees to forward datagrams (described in the
DM" section on page 33-4
differently for each:
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Sparse-mode PIM uses the RPF lookup function to decide where it needs to send joins and prunes:
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Dense-mode PIM uses only source trees and use RPF as previously described.
Configuring IP Multicast Routing
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Default Multicast Routing Configuration

Table 33-2
Table 33-2
Feature
Multicast routing
PIM version
PIM mode
PIM RP address
PIM domain border
PIM multicast boundary
Cisco ME 3800X and 3600X Switch Software Configuration Guide
33-8
and the
If a PIM router or multilayer switch has a source-tree state (that is, an (S,G) entry is present in the
multicast routing table), it performs the RPF check against the IP address of the source of the
multicast packet.
If a PIM router or multilayer switch has a shared-tree state (and no explicit source-tree state), it
performs the RPF check on the RP address (which is known when members join the group).
(S,G) joins (which are source-tree states) are sent toward the source.
(*,G) joins (which are shared-tree states) are sent toward the RP.
Default Multicast Routing Configuration, page 33-8
Multicast Routing Configuration Guidelines, page 33-9
Configuring Basic Multicast Routing, page 33-10
Configuring PIM Stub Routing, page 33-12
Configuring Source-Specific Multicast, page 33-13
Configuring Source Specific Multicast Mapping, page 33-16
Configuring a Rendezvous Point, page 33-22
you want to treat the group as a sparse group)
Using Auto-RP and a BSR, page 33-31
Cisco PIM v1 devices))
Monitoring the RP Mapping Information, page 33-32
Troubleshooting PIMv1 and PIMv2 Interoperability Problems, page 33-32
shows the default multicast routing configuration.
Default Multicast Routing Configuration
"PIM SM" section on page
(required)
(optional)
(required if the interface is in sparse-dense mode, and
(required for non-Cisco PIMv2 devices to interoperate with
(optional)
Default Setting
Disabled on all interfaces.
Version 2.
No mode is defined.
None configured.
Disabled.
None.
Chapter 33 Configuring IP Multicast Routing
33-4). The RPF check is performed
(optional)
"PIM
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