Patent ID: 11949589
Assignee: PENSANDO SYSTEMS INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A system comprising:
a circular replication chain that includes a plurality of service nodes that are each configured to:
store a plurality of local flow tables that each include a flow table entry that matches a first packet received by the circular replication chain;
produce a second packet by using the flow table entry that matches the first packet to process the first packet,
change the flow table entry that matches the first packet in response to processing the first packet;
send the second packet to a destination indicated by a destination address of the second packet;
use circular chain replication to synchronize the local flow tables,

wherein:
each of the service nodes has an upstream peer that is in the circular replication chain and has a downstream peer that is in the circular replication chain,
circular chain replication includes sending a plurality of flow sync packets received from the upstream peer to the downstream peer; and
circular chain replication includes each of the service nodes updating the local flow table based on packet header information in the flow sync packets.