PIM Sparse-Mode | 75534PIM Sparse-ModePIM Sparse-Mode is supported on platforms: c e sPIM-SM is supported on the E-Series ExaScale platform with FTOS 8.1.1.0 and later.PIM-Sparse Mode (PIM-SM) is a multicast protocol that forwards multicast traffic to a subnet only uponrequest using a PIM Join message; this behavior is the opposite of PIM-Dense Mode, which forwardsmulticast traffic to all subnets until it receives a request to stop.Implementation Information• The Dell Force10 implementation of PIM-SM is based on the IETF Internet Draftdraft-ietf-pim-sm-v2-new-05.• C-Series supports a maximum of 31 PIM interfaces and 4K multicast entries including (*,G), and(S,G) entries. There is no limit on the number of PIM neighbors C-Series can have.• S-Series supports a maximum of 31 PIM interfaces and 2K multicast entries including (*,G), and (S,G)entries. There is no limit on the number of PIM neighbors S-Series can have.• E-Series supports a maximum of 511 PIM interfaces and 50K multicast entries including (*,G), (S,G),and (S,G,rpt) entries. There is no limit on the number of PIM neighbors E-Series can have.• The SPT-Threshold is zero, which means that the last-hop designated router (DR) joins the shortestpath tree (SPT) to the source upon receiving the first multicast packet.• FTOS reduces the number of control messages sent between multicast routers by bundling Join andPrune requests in the same message.• FTOS supports PIM-SM on physical, VLAN, and port-channel interfaces.• FTOS supports 2000 IPv6 multicast forwarding entries, with up to 128 PIM-SSM neighbors/interfaces.• On VLAN interfaces, PIM-SM is supported on C-Series, E-Series, and S-Series platforms.• IPv6 Multicast is not supported on SONET interfaces.
