Deployment Guide

Equal Cost Multi-Path | 491
FTOS(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 line card 1 and 00 XX for line card 2 (ip-sa-mask and ip-da-mask).
The mask value must be the same for both line cards when using multiple line cards as ingress
(where XX is any value from 00 to FF for both line cards). For example, assume traffic is flowing
between linecard 1 and linecard 2:
hash-algorithm linecard 1 ip-sa-mask aa ip-da-mask 00
hash-algorithm linecard 2 ip-sa-mask 00 ip-da-mask aa
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, then 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.
On TeraScale if the keyword ECMP or LAG is not entered, Dell Networking OS assumes it to be
common for both. If the keyword ECMP or LAG is entered separately, both should fall in the range of
0 to 23 or 24 to 47 since compression enable/disable is common for both.
TeraScale and ExaScale support the range 0-47. The default for ExaScale is 24.
For EtherScale, only the range 0 to 15 is valid; 16 to 47 is considered as 15.
Related
Commands
0-11
Compression Enabled
rotate [0 - 11]
12 - 23
Compression Enabled
shift [0 - 11]
24 - 35
Compression Disabled
rotate [0 - 11]
36 - 47
Compression Disabled
shift [0 - 11]
load-balance (E-Series) Change the traffic balancing method.