Optimizing Traffic Flow with Port Controls, Port Trunking, and Filters

Port Trunking

L A C P N o t e

LACP operation requires full-duplex (FDx) links. For most installations, HP

 

recommends that you leave the port Mode settings at Auto (the default). LACP

 

also operates with Auto-10, Auto-100, and Auto-1000(if negotiation selects FDx);

 

10FDx, 100FDx, and 1000FDx settings.

 

Fault Tolerance: If a link in a port trunk fails, the switch redistributes

 

 

traffic originally destined for that link to the remaining links in the trunk. The

 

trunk remains operable as long as there is at least one link in operation. If a

 

link is restored, that link is automatically included in the traffic distribution

 

again. The LACP option also offers a standby link capability, which enables

 

you to keep links in reserve for service if one or more of the original active

 

links fails. See “Trunk Group Operation Using LACP” on page 9-25.)

 

Trunk Configuration Methods

 

Dynamic LACP Trunk: The switch automatically negotiates trunked links

 

between LACP-configured ports on separate devices, and offers one dynamic

 

trunk option: LACP. To configure the switch to initiate a dynamic LACP trunk

 

with another device, use the interface ethernet command in the CLI to set the

 

default LACP option to Active on the ports you want to use for the trunk. For

 

example, the following command sets ports C1-C4 to LACP active:

 

HPswitch(config) int e c1-c4 lacp active

 

Note that the above example works if the ports are not already operating in a

 

trunk. To change the LACP option on ports already operating as a trunk, you

 

must first remove them from the trunk. For example, if ports C1 - C4 were

 

LACP-active and operating in a trunk with another device, you would do the

 

following to change them to LACP-passive:

 

HPswitch(config)# no int e c1-c4 lacp

 

Removes the ports from the trunk.

 

HPswitch(config)# int e c1-c4 lacp passive

 

Configures LACP passive.

 

Static Trunk: The switch uses the links you configure with the Port/Trunk

 

Settings screen in the menu interface or the trunk command in the CLI to create

 

a static port trunk. The switch offers three types of static trunks: LACP, Trunk,

 

and FEC.

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