Dell Networking S6000 Uživatelský manuál stáhnout pdf (Strana 332)

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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.

Configuring Fast Boot and LACP Fast Switchover

Configure the optimized booting time functionality by performing the following steps. This procedure is

supported on the S6000 platform.

1. Enable the system to restart with optimized booting-time functionality enabled.

CONFIGURATION mode

Dell(conf)#reload-type fastboot

2. Configure fast boot on a port-channel on both the nodes that are members of a port-channel in

order to enable the physical ports to be aggregated faster. You can configure the optimal switchover

functionality for LACP even if you do not enable the fast boot mode on the system. This 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

Optimizing the Boot Time

This functionality is supported on the S6000 platform.

You can reduce the booting time of an S6000 switch by using the fast boot feature. With the reduced

time that is taken to reboot the switch, upon a manually-initiated reload or an expected restart of the

device, there is minimal disruption in the traffic that is managed by the switch. Traffic outage is lowered

considerably (reduced to approximately 25 seconds in certain network deployments) when you enable

this optimization method while booting the device. By reducing the duration of traffic loss, the subscriber

sessions are processed and preserved in an effective and seamless way.

You can configure this capability on an S6000 switch that is deployed as a top-of-rack (ToR) switch. The

ToR switch is the single point of connection to the network for servers in that rack. This functionality of

minimized reload time is supported in a network deployment in which the servers are connected through

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Flex Hash and Optimized Boot-Up

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