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FAQ: How Does the Eth-Trunk Interface on an ME60 Perform Flow-by-Flow Forwarding?

Publication Date:  2013-09-03 Views:  6 Downloads:  0
Issue Description
By default, the Eth-Trunk interface on an ME60 forwards data by flow. How is the per-flow forwarding implemented?
Handling Process
N/A
Root Cause
N/A
Solution
By default, an ME60 forwards data by flow and performs hash based on source and destination IP addresses. The ME60 performs the exclusive-OR calculation based on the two 32-bit IP addresses. The calculated 32-bit digit is divided into a high-order 16 bit and a low-order 16 bit, which are exclusive-ORed. If the Eth-Trunk contains two member interfaces, the source and destination IP addresses must be exclusive-ORed to 1 bit; if the Eth-Trunk contains three or four member interfaces, the source and destination IP addresses must be exclusive-ORed to 4 bits. The outbound port is selected in sequence of 5:5:6 and 4:4:4:4.
Suggestions

In per-flow forwarding mode, traffic may be different.

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