Service Manual

CONFIGURATION mode
Dell(conf)# load-balance flexhash ipv4/ipv6 ip-proto <protocol number> <description
string> offset1 <offset1 value> [offset2 <offset2 value>]
To delete the congured ex hash setting, use the no version of the command.
Conguring Fast Boot and LACP Fast Switchover
Congure the optimized booting time functionality by performing the following steps. This procedure is supported on the platform.
1. Enable the system to restart with optimized booting-time functionality enabled.
CONFIGURATION mode
Dell(conf)#reload-type fastboot
2. Congure 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 congure 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 eect. If you congure 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 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 trac that is
managed by the switch. Trac 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 trac loss, the
subscriber sessions are processed and preserved in an eective and seamless way.
You can congure 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 a ToR, leaf and spine unit or conguration setup. An exterior border gateway
protocol (EBGP) session exists between the ToR and leaf switch units, and between the leaf and spine units or nodes.
Booting Process When Optimized Boot Time Mechanism is Enabled
When an S6000 switch running Dell Networking OS earlier than Release 9.3(0.0) is reloaded, the CPU and other components on the
board are reset at the same time. Therefore, the control plane and the forwarding plane are impacted immediately. After the system
boots up and re-initializes, the interfaces come up, control plane protocols are reestablished, and the network topology information
(such as routes, adjacency settings) is learned and installed before the trac resumes. In a typical network scenario, a trac
disconnection of 150 seconds or more usually occurs. When you employ the optimized booting functionality, the trac outage
duration is reduced drastically.
Guidelines for Conguring Optimized Booting Mechanism
Keep the following points and limitations in mind when you congure the fast boot capability:
• Fast boot is supported only when you perform an expected, stipulated reload by using the reload-type normal-reload
command in Global Conguration mode or by using the reset command in uBoot mode on a switch that is running Dell
Networking OS Release 9.3(0.0) or later, or when you perform a planned upgrade (and not an abrupt or unexpected shutdown)
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Flex Hash and Optimized Boot-Up