Dell S6000 Reference Manual page 560

the L4 header to be used for hash calculation, and a meaningful description to associate the protocol
number with the name. This utility is supported on the S6000 platform.
Syntax
load-balance flexhash ipv4/ipv6 ip-proto <protocol number>
<description string> offset1 <offset1 value> [offset2 <offset2
value>]
To disable the Flex hash settings, use the no load-balance flexhash ipv4/
ipv6 ip-proto protocol number command.
Parameters
ipv4
ipv6
protocol
number
description
string
offset1 value
offset2 value
Default None
Command CONFIGURATION mode
Modes
Command
Version 9.3(0.0)
History
Usage
With the introduction of various overlay technologies such as network virtualization
Information
using generic routing encapsulation (NVGRE) segments and Routable Remote
Direct Memory Access (RRDMA) over Converged Ethernet (RRoCE), information
related to a traffic flow is contained in the L4 header. The fields in the L2 and L3
560
Denotes whether Flex Hash needs to be enabled for IPv4
packets.
Denotes whether Flex Hash needs to be enabled for IPv6
packets.
Represents the Outer IPv4 protocol field in case of IPv4
packets, and the Outer IPv6 next header field in case of IPv6
packets.
The ipv4/ipv6 keyword and the IP protocol value are used
as keys to identify if a duplicate flex hash configuration is
already present. Duplicate flex hash configuration is not
possible. To change an existing flex hash configuration, you
must delete the existing flex hash attribute and configure the
flex attribute afresh.
A description string is followed by the protocol number to
enable you to associate the protocol number with the
protocol name in an easily-identifiable way. For example, for
a protocol number of 254, you can specify the description as
RRoCE.
Specify the byte offset from the start of the L4 header from
which the 2-byte data is extracted and be used in hash
computation. You must enter the offset as an even number.
The offset range is 0 – 30 bytes from start of L4 header.
(Optional) Specify the additional 2 bytes that must be
extracted from the start of the L4 header to be used for hash
computation. You must enter the offset as an even number.
The offset range is 0 – 30 bytes from start of L4 header.
Introduced on the S6000 platform.
Flex Hash and Optimized Boot-Up