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PIM Sparse-Mode
PIM Sparse-Mode is supported on platforms: c e s
PIM-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 upon
request using a PIM Join message; this behavior is the opposite of PIM-Dense Mode, which forwards
multicast 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 Draft
draft-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 shortest
path 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 and
Prune 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.