Flow Remapping When a Port is Added to the Aggregator

When a port is added to the aggregator, some flows must be moved to the newly added port in order to maintain even (or approximately even) distribution. With Resilient Hashing configured, the flows moved to the newly added port will come evenly (or approximately evenly) from the flows previously mapped to each of the former member ports.

Example Remapping of Flows

  • N (number of entries in the flow set table): 256
  • Before addition of new port to the aggregator:
    • M (number of ports in the aggregator): 8
    • Number of entries occupied by each member: 32 (256/8)
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Remapping Flows Example

Port # of table entries before addition # of table entries after addition Change in # of flows on port
1 32 29 -3
2 32 29 -3
3 32 29 -3
4 32 29 -3
5 32 28 -4
6 32 28 -4
7 32 28 -4
8 32 28 -4
9 0 28 -4
Total Entries 256 256 +28

With Resilient Hashing configured, the minimum number of flows are moved in order to maintain even distribution.