DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
1032
83.
Protocol Independent Multicast (PIM)
Commands
83-1 ip pim
This command is used to enable PIM on the interface for either Sparse Mode (SM) or Dense Mode (DM)
operation. Use the
no
command to disable the PIM function on the interface.
ip pim {sparse-mode | dense-mode | sparse-dense-mode}
no ip pim
Parameters
sparse-mode
Specifies to operate in the SM mode.
dense-mode
Specifies to operate in the DM mode.
sparse-dense-mode
Specifies to operate in the SM-DM mode.
Default
By default, this option is disabled.
Command Mode
Interface Configuration Mode.
Command Default Level
Level: 12.
Usage Guideline
This command only takes effect when the interface has an IP address configured.
Specify one of the three modes for an interface, sparse mode, dense mode or sparse-dense mode. To
switch the PIM operating mode, use the
no ip pim
command to disable PIM first then set the new mode.
Dense Mode
- PIM-DM assumes that when a source starts sending, all downstream routers wants to
receive the multicast data stream. Initially multicast data stream are flooded to all downstream routers and
the interfaces that have group members. If there are no downstream routers or group members, the
router will send prune message to indicate that the multicast data stream is not desired.
Sparse Mode
- When multicast traffic is received on a sparse mode interface, the first hop router will
encapsulate and send the register message to RP. If the router is not the first hop router, the traffic will be
forwarded based on the mroute entry.
A sparse mode interface will only be populated as mroute member interface if receive join message from
the downstream router or if group member on a sparse mode interface, PIM join process will be triggered
to create the shared tree or the source tree.
Sparse-Dense Mode
- When interface is configured as PIM Sparse-Dense mode, a multicast group
received by the interface can operate in either sparse mode or dense mode of operation. When the
interface receives a multicast traffic, if there is a known RP for the group, then this group will be operate
in sparse mode, otherwise this multicast group will be operated in dense mode.
Example
This example shows how to enable the PIM-SM protocol on the specified interface.
Switch# configure terminal
Switch(config)# interface vlan1
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