Users Guide

Dell provides a CLI-based solution for modifying the hash seed to ensure that on each
configured system, the ECMP selection is same. When configured, the same seed is set
for ECMP, LAG, and NH, and is used for incoming traffic only.
NOTE: While the seed is stored separately on each port-pipe, the same seed is
used across all CAMs.
You cannot separate LAG and ECMP but you can use different algorithms across
the chassis with the same seed. If LAG member ports span multiple port-pipes
and line cards, set the seed to the same value on each port-pipe to achieve
deterministic behavior.
If the hash algorithm configuration is removed, the hash seed does not go to the
original factory default setting.
ip ecmp-group
Enable and specify the maximum number of ecmp that the L3 CAM hold for a route, By default, when
maximum paths are not configured, the CAM can hold a maximum of 16 ecmp per route.
Syntax
ip ecmp-group {maximum-paths | {number} {path-fallback}
To negate a command, use the no ip ecmp-group maximum-paths {number}
command.
Parameters
maximum-paths Specify the maximum number of ECMP for a route. The range is
2 to 64.
path-fallback Use the keywords path-fallback to enable this feature. If you
enable the feature, re-enter this keyword to disable the feature.
Defaults 16
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, see
the relevant Dell Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
Equal Cost Multi-Path (ECMP) 743