HP 7102dl - ProCurve Secure Router Configuration Manual page 709

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C a u t i o n
5. You can also prohibit the router from using SP trees at all. Enter this
command from the PIM sparse configuration mode context:
Syntax: spt-threshold infinity
6. You can configure different RPs to support different multicast groups.
Configure the address or range of addresses for groups that the RP should
support in a standard ACL. Then associate the ACL with the RP. Follow
these steps:
a. Create the ACL from the global configuration mode context:
Syntax: ip access-list standard <listname>
b. If you want to ensure that a certain router acts as RP for a certain
group, you must disable all other RPs from supporting that group. For
example, you want Router A to support group 1. Router B supports a
range of groups that includes group 1. In this case, you must enter a
deny statement for the group 1 in the ACL for Router B. Enter this
command:
Syntax: deny [host <A.B.C.D> | <A.B.C.D> <wildcard bits>]
Use the host keyword to specify a single address. Use wildcard bits,
which operate on reverse logic of subnet masks, to select a range of
addresses. (Remember to enter the deny statement before permitting
the range of addresses that includes the host or hosts denied.)
c. Specify the address or range of addresses for the multicast groups
that the RP can support:
Syntax: permit [host <A.B.C.D> | <A.B.C.D> <wildcard bits>]
Simply because an RP can support a group does not mean that it will
actually do so. If a second RP supports the group as well, that second RP
may be selected instead.
d. Move to the PIM sparse configuration mode context:
Syntax: router pim-sparse
e. Specify the IP address of the RP and associate the ACL with the RP:
Syntax: rp-address <A.B.C.D> access-group <listname>
Routing protocols send messages to multicast addresses 224.0.0.0 through
224.0.0.255. You should be very careful to configure at least one RP to support
these address so that routers can transit routing updates between remote sites.
Configuring Multicast Support with PIM-SM
Quick Start
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