CLI Guide

Version Description
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.10.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
7.8.1.0 Added the nh-ecmp option.
7.7.1.1 Added the nh-ecmp option.
Usage Information To ensure that CRC is not used for LAG, set the default hash-algorithm method on
E-Series systems. For example,hash-algorithm ecmp xor lag checksum
nh-ecmp checksum.
The hash value calculated with the hash-algorithm command is unique to the
entire unit. The hash algorithm command with the stack-unit option changes the
hash for a particular stack-unit by applying the mask specified in the IPSA and IPDA
fields.
The stack-unit option is applicable with the lag-hash-align microcode only. Any
other microcode returns an error message as follows:
• Dell(conf)#hash-algorithm linecard 5 ip-sa-mask ff ip-da-
mask ff
• % Error: This command is not supported in the current
microcode configuration
The different hash algorithms are based on the number of Port Channel members
and packet values. The default hash algorithm (number 0) yields the most balanced
results in various test scenarios, but if the default algorithm does not provide a
satisfactory distribution of traffic, use the hash-algorithm command to designate
another algorithm.
When a Port Channel member leaves or is added to the Port Channel, the hash
algorithm is recalculated to balance traffic across the members.
642
Equal Cost Multi-Path (ECMP)