Dell Networking S4810, Reference Manual

Page: 648 / 1761

FTOS 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.
S4810
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
Version 9.0.2.0 Introduced on the S6000.
Version 9.0.0.0 Introduced on the Z9000.
Version
8.3.10.0 Introduced on the S4810.
Usage
Information You must save the new ECMP settings to the startup-config (
write-mem
) then
reload the system for the new settings to take effect.
648
Equal Cost Multi-Path (ECMP)