Basic PIM-SM Configurations

The following describes a basic PIM configuration. PIM-SSM is a simplified version of PIM-SM. PIM-SSM does not require either a BSR or an RP. In a PIM-SSM configuration there is no need for a candidate BSR, a candidate RP, or a static RP. In a mixed PIM-SSM and PIM-SM configuration, the candidate BSR, candidate RP, and the static RP need only be configured for the non-PIM-SSM address ranges.

By default, PIM-SM and PIM-SSM are disabled globally on S- K- and 7100-Series devices and attached interfaces. Basic PIM configuration includes the following steps:

1. Creating and enabling VLANs with IP interfaces.
2. Configuring the underlying unicast routing protocol (for example, OSPF).
3. Enabling IGMP on the VLANs. Enable IGMP for interfaces with IGMP reporters. Enable IGMP version 3 on interfaces using PIM-SSM
4. Configuring PIM-SM and/or PIM-SSM on the VLANs.

Basic PIM Sparse Mode Configuration, which describes the basic steps the configure PIM-SM on an S- K- and 7100-Series device, assumes the following:

• VLANs have been configured and enabled with IP interfaces.
• The unicast routing protocol has been configured.
• IGMP has been enabled on the devices and VLANs that will be connected with hosts. For information on enabling IGMP, see Configuring IGMP.
  

  Note

  PIM-SSM and PIM-SM can coexist in a network. A candidate BSR, candidate RP, and static RP addresses can be configured in a PIM-SSM configuration, but are not required. Along with IGMP, PIM-SSM must be enabled on the source host interface and be reachable by the PIM-SSM destination addresses.
  

  Basic PIM Sparse Mode Configuration

  Step	Task	Command(s)
  1	If desired, change the DR priority of one or more interfaces on the Extreme Networks S- K- and 7100-Series router from the default value of 1 in interface configuration mode. The highest priority PIM router on a shared network is elected the DR for that network.	IPv4: ip pim dr-priority priority IPv6: ipv6 pim dr-priority priority
  2	If the dynamic BSR RP set distribution method is used on the network, configure at least one PIM router as a candidate BSR in interface configuration mode. Note that the Extreme Networks S- K- and 7100-Series router does not act as a BSR without being explicitly configured to do so.	IPv4: ip pim bsr-candidate pim-interface [priority priority] IPv6: ipv6 pim bsr candidate bsr interface-address [priority priority]
  3	If the dynamic BSR RP set distribution method will be used on the network, configure at least one PIM router as a Candidate Rendezvous Point in global configuration mode. Note that the Extreme Networks S- K- and 7100-Series router does not act as an RP without being explicitly configured to do so.	IPv4: ip pim rp-candidate pim-interface group-address group-mask [priority priority] IPv6: ipv6 pim bsr candidate rp pim-interface-address {[group-list group-list] [priority priority]}
  4	If static RP set distribution is desired, configure the static RP set information in global configuration mode. The RP set information must be the same on all PIM routers in the network. Static RP set distribution cannot be combined with BSR RP set distribution in the same PIM domain. Routers with statically configured RP set information discard RP set information learned from a BSR.	IPv4: ip pim rp-address rp-address group-address group-mask IPv6: ipv6 pim rp-address rp-address group-list group-list
  1.	Configure PIM-SM and/or PIM/SSM on the S- K- and 7100-Series router that will run PIM-SM. PIM-SM is configured on the interface. PIM-SSM is globally configured in global configuration mode. IPv6 PIM-SSM is enabled on the device by default with an address range of FF3E:0000/32.	IPv4: ip pim sparse-mode ip pim ssm IPv6: ipv6 pim sparse-mode