Lag And Ecmp Hashing - Alcatel-Lucent 7210 SAS M Interface Configuration Manual

LAG

LAG and ECMP Hashing

Note: ECMP hashing is supported only on 7210 SAS devices in network mode.
When a requirement exists to increase the available bandwidth for a logical link that exceeds the
physical bandwidth or add redundancy for a physical link, typically one of the methods is applied;
equal cost multi-path (ECMP) or Link Aggregation (LAG). A 7210 SAS can deploy both at the
same time, meaning, using ECMP of two or more Link Aggregation Groups (LAG) and/or single
links.The Alcatel-Lucent implementation supports per flow hashing used to achieve uniform
loadspreading and per service hashing designed to provide consistent per service forwarding.
Depending on the type of traffic that needs to be distributed into an ECMP and/or a LAG, different
variables are used as input to the hashing algorithm.
The tables below provides the packet fields used for hashing for different services and different
traffic types for different platforms
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ration Guide
7210 SAS M, T, X, R6, R12, Mxp Interface Configu-