BigIron RX Series Configuration Guide
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53-1001810-01
Anycast RP
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Use the ip address parameter to specify the IP address of the router you want to designate as an
RP router.
Use the acl name or id (optional) parameter to specify the name or ID of the ACL that specifies
which multicast groups use this RP.
Displaying the static RP
Use the show ip pim rp-set command to display static RP and the associated group ranges.
BigIron RX(config)# show ip pim rp-set
Static RP and associated group ranges
-------------------------------------
Static RP count: 4
130.1.1.1
permit 238.1.1.0/24
permit 239.1.0.0/16
permit 235.0.0.0/8
120.1.1.1
deny all
120.2.1.1
deny all
124.1.1.1
permit 224.0.0.0/4
Number of group prefixes Learnt from BSR: 0
No RP-Set present.
Use the show ip pim rp-map command to display all current multicast group addresses to RP
address mapping.
BigIron RX(config)# show ip pim rp-map
Number of group-to-RP mappings: 5
Group address RP address
----------------------------------------
1 230.0.0.1 100.1.1.1
2 230.0.0.2 100.1.1.1
3 230.0.0.3 100.1.1.1
4 230.0.0.4 100.1.1.1
5 230.0.0.5 100.1.1.1
Anycast RP
Anycast RP is a method of providing intra-domain redundancy and load-balancing between multiple
Rendezvous Points (RP) in a Protocol Independent Multicast Sparse mode (PIM-SM) network. It is
accomplished by configuring all RPs within a domain with the same anycast RP address which is
typically a loopback IP address. Multicast Source Discovery Protocol (MSDP) is used between all of
the RPs in a mesh configuration to keep all RPs in sync regarding the active sources.
PIM-SM routers are configured to register (statically or dynamically) with the RP using the same
anycast RP address. Since multiple RPs have the same anycast address, an Interior Gateway
Protocol (IGP) such as OSPF routes the PIM-SM router to the RP with the best route. If the PIM-SM
routers are distributed evenly throughout the domain, the loads on RPs within the domain will be
distributed. If the RP with the best route goes out of service, the PIM-SM router’s IGP changes the
route to the closest operating RP that has the same anycast address.
This configuration works because MSDP is configured between all of the RPs in the domain.
Consequently, all of the RPs share information about active sources.
Содержание Brocade DCX
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