Service Manual
linecard number
(OPTIONAL) : Enter the keyword linecard then the linecard slot number.
port-set number
(OPTIONAL) Enter the keyword port-set then the port-set slot number.
Defaults IPSA and IPDA mask value is FF for the stack-unit.
Command Modes CONFIGURATION
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.9(0.0) Added flow-based-hashing support for hashing on ECMP for S4820T, S6000,
S4048 and Z9500.
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 specied in
the IPSA and IPDA elds.
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
In addition, the linecard number ip-sa-mask value ip-da-mask value option has the following
behavior to maintain bi-directionality:
• When hashing is done on both IPSA and IPDA, the ip-sa-mask and ip-da-mask values must be equal.
(Single Linecard).
• When hashing is done only on IPSA or IPDA, Dell Networking OS maintains bi-directionality with masks set to
XX 00 for stack-unit 1 and 00 XX for stack-unit 2 (ip-sa-mask and ip-da-mask). The mask value must be
the same for both stack-units when using multiple stack-units as ingress (where XX is any value from 00 to FF
for both stack-units). For example, assume that trac is owing between linecard 1 and linecard 2:
• hash-algorithm linecard 1 ip-sa-mask aa ip-da-mask 00
584 Equal Cost Multi-Path (ECMP)