From: Kubrat Vapzarov (kvapzarov@yahoo.com)
Date: Fri Jan 04 2008 - 10:19:18 ARST
Hello Group,
I have a question about multicast routing with Auto-RP. According to some Cisco documents in order to prevent the multicast groups (other than 224.0.1.39 and .40) from operating in dense mode, a sink RP must be configured. Something like this:
ip pim rp-address 1.1.1.1 20
ip pim send-rp-announce Loopback0 scope 32 group-list 10
ip pim send-rp-discovery Loopback0 scope 32
access-list 10 permit 224.0.0.0 15.255.255.255
access-list 20 deny 224.0.1.39
access-list 20 deny 224.0.1.40
access-list 20 permit 224.0.0.0 15.255.255.255
However, there is a command "ip pim spt-threshold" whose "infinity" option will do the same, or so I think.
My question is do these two different configurations achieve the same or are they different and how?
Kubrat
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