Service Manual
16
Flex Hash and Optimized Boot-Up
This chapter describes the Flex Hash and fast-boot enhancements.
load-balance ingress-port enable
Enable the Flex hash functionality. This utility is supported on the platform.
Syntax
load-balance ingress-port enable
To disable the Flex hash capability, use the no version of this command.
Default None
Command Modes CONFIGURATION mode
Command History
Version 9.3(0.0) Introduced on the S6000 platform.
Usage Information Flex hash uses the RTAG7 bins 2 and 3 (overlay bins). These bins must be enabled for Flex hash to be
congured. These bins contain the source module and source port information. These bins are disabled by
default in releases of Dell Networking OS earlier than Release 9.3.0.0. The default behavior of disabling of
these bins occurs because of incorrect egress port information that would otherwise be displayed in the
output of the diagnostic show command of show ip flow.
As a result, when load balancing of RRoCE packets using Flex hash is enabled, the show ip flow
command is not functional. Similarly, when show ip flow command operates (ingress port based load
balancing is disabled) the hashing of RRoCE packets is not operational.
Flex hash APIs do not mask out unwanted byte values after extraction of the data from the Layer 4 headers
for the oset value.
Example
Dell#load-balance ingress-port enable
load-balance exhash
Specify the parameters for the Flex Hash mechanism, such as whether IPv4 or IPv6 packets must be subject to Flex Hash
functionality, a unique protocol number, the oset of hash elds from the start of 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 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.
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