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9-25

Optimizing Traffic Flow with Port Controls, Port Trunking, and Port-Based Priority

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.

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

100FX, etc.) and the same speed, and enforces speed and duplex conformance

across a trunk group.

LACP trunk status commands include:

Thus, to display a listing of dynamic LACP trunk ports, you must use the show

lacp command.

Note Dynamic LACP trunks operate only in the default VLAN (unless GVRP is

enabled and Forbid is used to prevent the trunked ports from joining the default

VLAN). Thus, if an LACP dynamic port forms using ports that are not in the

default VLAN, the trunk will automatically move to the default VLAN unless

GVRP operation is configured to prevent this from occurring. In some cases,

this can create a traffic loop in your network. For more on this topic, refer to

“VLANs and Dynamic LACP” on page 9-30.

In most cases, trunks configured for LACP on the Switches 2650 and 6108

operate as described in table 9-9-5 on the next page.

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

!Software.book Page 25 Thursday, October 10, 2002 6:10 PM

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