Brocade BigIron RX Series Configuration Guide - Manual (Page 759)

BigIron RX Series Configuration Guide 681
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PIM Sparse
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NOTE
Brocade recommends that you configure the same BigIron RX as both the BSR and the RP.
Current limitations
The implementation of PIM Sparse in the current software release has the following limitations:
• PIM Sparse and regular PIM (dense mode) cannot be used on the same interface.
• You cannot configure or display PIM Sparse information using the Web management interface.
(You can display some general PIM information, but not specific PIM Sparse information.)
Configuring global PIM Sparse parameters
NOTE
When PIM routing is enabled on a BigIron RX, the line rate for receive traffic is reduced by about 5%.
The reduction occurs due to overhead from the VLAN multicasting feature, which PIM routing uses.
This behavior is normal and does not indicate a problem with the device.
To configure basic global PIM Sparse parameters, enter commands such as the following on each
BigIron RX within the PIM Sparse domain.
BigIron RX(config)# router pim
Syntax: [no] router pim
NOTE
You do not need to globally enable IP multicast routing when configuring PIM Sparse.
The command in this example enables IP multicast routing, and enables the PIM Sparse mode of IP
multicast routing. The command does not configure the BigIron RX as a candidate PIM Sparse
Bootstrap Router (BSR) and candidate Rendezvous Point (RP). You can configure a BigIron RX as a
PIM Sparse router without configuring the BigIron RX as a candidate BSR and RP. However, if you
do configure the BigIron RX as one of these, Brocade recommends that you configure the BigIron
RX as both of these. Refer to
“Configuring BSRs” on page 682.
Entering a [no] router pim command does the following:
• Disables PIM or DVMRP.
• Removes all configuration for PIM multicast on a BigIron RX (router pim level) only.
Configuring PIM interface parameters
After you enable IP multicast routing and PIM Sparse at the global level, you must enable it on the
individual interfaces connected to the PIM Sparse network.
To enable PIM Sparse mode on an interface, enter commands such as the following.
BigIron RX(config)# interface ethernet 2/2
BigIron RX(config-if-e10000-2/2)# ip default-network 207.95.7.1 255.255.255.0
BigIron RX(config-if-e10000-2/2)# ip pim-sparse
Syntax: [no] ip pim-sparse
The commands in this example add an IP interface to port 2/2, then enable PIM Sparse on the
interface.