Nonstop forwarding for routed multicast traffic

A method comprising:

• experiencing a failure in a network using a protocol independent multicast (PIM) protocol during a state of recovering from the failure, using at least one processor to:
• receive a PIM message related to a given multicast route (mroute) at a network component;
• update, based on the received PIM message, an outgoing list (Olist) for the given mroute in the PIM cache (PIM cache Olist) stored in a PIM cache of the network component;
• determine whether the PIM cache Olist matches a centralized database Olist located in a centralized database;
• and
• publish an mroute state from the PIM cache to the centralized database only on condition of the PIM cache Olist matching the centralized database Olist.

A non-transitory computer-readable medium storing instructions executable by a processor to cause the processor to:

• detect that a failure has occurred at a network component and cause the network component to enter a failure recovery state, the network component using a protocol independent multicast (PIM) protocol;
• during the failure recovery state:
• receive updates to an outgoing list (Olist) for a given multicast route (mroute) at the network component;
• update a PIM cache Olist in the network component with the received updates;
• determine whether the PIM cache Olist matches a centralized database Olist located in a centralized database;
• and
• publish an mroute state from the PIM cache to the centralized database only on condition of the PIM cache Olist matching a centralized database Olist.