Administrator Guide

Term heading Description heading
dest-ip Uses the destination IP for ECMP hashing. The default is enabled.
lsb Returns the LSB of the key as the hash. The default is crc-lower.
Defaults
• crc-lower
• dest-ip enabled
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
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
Usage Information The hash value calculated with the hash-algorithm command is unique to the entire chassis. The default
ECMP hash configuration is crc-lower. This command takes the lower 32 bits of the hash key to compute the
egress port and is the “fall-back” configuration if you have not configured anything else.
The different hash algorithms are based on the number of ECMP group members and packet values. The default
hash algorithm yields the most balanced results in various test scenarios, but if the default algorithm does not
provide satisfactory distribution of traffic, use this command to designate another algorithm.
When a member leaves or is added to the ECMP group, the hash algorithm is recalculated to balance traffic
across the members.
hash-algorithm seed
Select the seed value for the ECMP, LAG, and NH hashing algorithm.
Syntax
hash-algorithm seed value [stack-unitslot/port] [port-set number]
Parameters
seed value Enter the keyword seed then the seed value. The range is from 0 to 2,147,483,646.
stack–unit slot/
port
Enter the keyword stack-unit then the slot/port[subport] number.
port-set number Enter the keyword port-set then the port-pipe number. The value is 0.
Defaults None
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
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
Equal Cost Multi-Path (ECMP) 585