PIM Backup Designated Router Procedure

Document Type Expired Internet-Draft (individual)
Authors Mankamana Mishra  , Sridhar Santhanam  , Aravind Paramasivam  , Joseph Goh  , Gyan Mishra 
Last updated 2021-10-10 (latest revision 2021-04-08)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


On a multi-access network, one of the PIM routers is elected as a Designated Router (DR). On the last hop LAN, the PIM DR is responsible for tracking local multicast listeners and forwarding traffic to these listeners if the group is operating in PIM-SM. In this document, we propose a mechanism to elect backup DR on a shared LAN. A backup DR on LAN would be useful for faster convergence. This draft introduces the concept of a Backup Designated Router (BDR) and the procedure to implement it.


Mankamana Mishra (mankamis@cisco.com)
Sridhar Santhanam (sridsant@cisco.com)
Aravind Paramasivam (arparama@cisco.com)
Joseph Goh (hocgoh@cisco.com)
Gyan Mishra (gyan.s.mishra@verizon.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)