Name: Cisco Catalyst 2960-XR
Brand: Cisco
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Defining the PIM Domain Border

As IP multicast becomes more widespread, the chance of one PIMv2 domain bordering another PIMv2 domain

increases. Because two domains probably do not share the same set of RPs, BSR, candidate RPs, and candidate

BSRs, you need to constrain PIMv2 BSR messages from flowing into or out of the domain. Allowing messages

to leak across the domain borders could adversely affect the normal BSR election mechanism and elect a

single BSR across all bordering domains and comingle candidate RP advertisements, resulting in the election

of RPs in the wrong domain.

This figure displays how you can configure the PIM domain border by using the ip pim bsr-border command.

Figure 5: Constraining PIMv2 BSR Messages

This procedure is optional.

SUMMARY STEPS

configure terminal

interface interface-id

ip pim bsr-border

end

show running-config

copy running-config startup-config

DETAILED STEPS

PurposeCommand or Action

Enters the global configuration mode.configure terminal

Example:

Switch# configure terminal

Step 1

Catalyst 2960-XR Switch IP Multicast Routing Configuration Guide, Cisco IOS Release 15.0(2)EX1

58 OL-29426-01

Configuring PIM

Configuring PIMv2 BSR

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