Optimizing Port Usage Through Traffic Control and

Optimizing Port Usage Through Traffic Control and Port Trunking

Port Trunking

Trunk Group Operation Using LACP

The switch can automatically configure a dynamic LACP trunk group or you can manually configure a static LACP trunk group. The methods for displaying

N o t e

LACP requires full-duplex (FDx) links of the same media type (10/100Base-T,

 

100FX, etc.) and speed, and enforces speed and duplex conformance across

 

a trunk group.

 

LACP trunk status include:

 

Trunk Display Method

Static LACP Trunk

Dynamic LACP Trunk

CLI show lacp command

Included in listing.

Included in listing.

CLI show trunk command

Included in listing.

Not included.

Port/Trunk Settings screen in menu interface

Included in listing.

Not included

 

 

 

In most cases, trunks configured for LACP on the ProCurve 2512/ 2524 switches operate as described in table 6-6:

Table 6-6. LACP Trunk Types

LACP Port Trunk Operation

Configuration

Dynamic LACP This option automatically establishes an 802.3ad-complianttrunk group, with Dyn1 for the port Group name and LACP for the port Type parameter.

Under the following conditions, the switch automatically establishes a dynamic LACP port trunk group:

•The ports on both ends of a link have compatible mode settings (speed and duplex).

•The port on one end of a link must be configured for LACP Active and the port on the other end of the same link must be configured for either LACP Passive (the default) or LACP Active. For example:

Switch 1

 

 

Switch 2

Port X:

Active-to-Active

 

Port A:

LACP Enable: Active

 

 

LACP Enable: Active

 

 

 

Port Y:

Active-to-Passive

 

Port B:

LACP Enable: Active

 

 

LACP Enable: Passive

 

 

 

 

 

 

 

 

Either of the above link configurations allow a dynamic LACP trunk link.

Standby Links: A maximum of four operating links are allowed in the trunk, but, with dynamic LACP, you can configure one or more backup links that the switch automatically activates if a primary link fails. To configure a link as a standby for an existing four-port dynamic LACP trunk, ensure that both ports in the standby link are configured the same as either of the above examples.

Displaying Dynamic LACP Trunk Data: To list the configuration and status for a dynamic LACP trunk, use the CLI show lacp command.

Note: The dynamic trunk is automatically created by the switch, and is not listed in the static trunk listings available in the menu interface or in the CLI show trunk listing.

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