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Hierarchy Level


Configure the designated forwarder (DF) election robustness count for bidirectional PIM. When a DF election Offer or Winner message fails to be received, the message is retransmitted. The robustness-count statement sets the minimum number of DF election messages that must fail to be received for DF election to fail. To prevent routing loops, all routers on the link must have a consistent view of the DF. When the DF election fails because DF election messages are not received, forwarding on bidirectional PIM routes is suspended.

If a router receives from a neighbor a better offer than its own, the router stops participating in the election for a period of robustness-count * offer-period. Eventually, all routers except the best candidate stop sending Offer messages.


number—Number of transmission attempts for DF election messages.

  • Range: 1 through 10

  • Default: 3

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 12.1.