hash-algorithm ecmp
Change the hash algorithm used to distribute traffic flows across an ECMP (equal-cost multipath routing)
group.
Z9500
Term heading
Description heading
Syntax
hash-algorithm ecmp {crc-upper} | {dest-ip} | {lsb}
To return to the default hash algorithm, use the
no hash-algorithm ecmp
command.
Parameters
crc-upper
Uses the upper 32 bits of the key for the hash computation.
The default is
crc-lower
.
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,
refer to the relevant
Dell Networking OS Command Line Reference Guide
.
The following is a list of the Dell Networking OS version history for this command.
Version
Description
9.2(1.0)
Introduced on the Z9500.
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 ExaScale.
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.
744
Equal Cost Multi-Path (ECMP)
