If it is necessary to increase the available bandwidth for a logical link that exceeds the physical bandwidth or to add redundancy for a physical link, typically one of two methods is applied: LAG or ECMP. A system can also deploy both at the same time using ECMP of two or more LAGs and/or single links.
The 7705 SAR supports per-flow and per-service hashing, as described in the following sections:
For general information on LAG, see LAG. For general information on ECMP, refer to the 7705 SAR Router Configuration Guide, ‟Static Routes, Dynamic Routes, and ECMP”.