Users Guide

When load balancing RRoCE packets using flex hash is enabled, the show ip flow command is
disabled. Similarly, when the show ip flow command is in use (ingress port-based load balancing
is disabled), the hashing of RRoCE packets is disabled.
Flex hash APIs do not mask out unwanted byte values after extraction of the data from the Layer 4
headers for the offset value.
2. Use the load-balance flexhash command to specify whether IPv4 or IPv6 packets must be
subjected to the flex hash functionality, a unique protocol number, the offset of hash fields 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.
CONFIGURATION mode
Dell(conf)# load-balance flexhash ipv4/ipv6 ip-proto <protocol number>
<description string> offset1 <offset1 value> [offset2 <offset2 value>]
To delete the configured flex hash setting, use the no version of the command.
LACP Fast Switchover
LACP Fast Switchover causes the physical ports to be aggregated faster when configured in a port-
channel on both the nodes that are members of a port-channel.
When LACP ‘fast-switchover’ is enabled on the system, two optimizations are performed to the LACP
behavior:
• The wait-while timer is not started in the ‘waiting’ state of the MUX state machine. The port moves
directly to the ‘attached’ state.
• The local system moves to the ‘collecting’ and ‘distributing’ states on the port in a single step without
waiting for the partner to set the ‘collecting’ bit.
Configuring LACP Fast Switchover
To configure the optimized booting time functionality, perform the following step:
• The lacp fast-switchover command applies to dynamic port-channel interfaces only. When
applied on a static port-channel, this command has no effect. If you configure the optimized booting-
time capability and perform a reload of the system, the LACP application sends PDUs across all the
active LACP links immediately. INTERFACE (conf-if-po-number) mode Dell(conf-if-po-
number)#lacp fast-switchover
LACP
LACP Fast Switchover
When LACP ‘fast-switchover’ is enabled on the system, two optimizations are performed to the LACP
behavior:
• The wait-while timer is not started in the ‘waiting’ state of the MUX state machine. The port moves
directly to the ‘attached’ state.
Flex Hash and Optimized Boot-Up
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