HP ProCurve 2610-24, Management And Configuration Manual

Page: 270 / 464

Port Trunking
Port Status and Configuration
ProCurve(config)# no trunk c4-c5
Enabling a Dynamic LACP Trunk Group. In the default port configura­
tion, all ports on the switch are set to LACP
Passive
. However, to enable the
switch to automatically form a trunk group that is dynamic on both ends of
the link, the ports on one end of a set of links must be LACP
Active . The ports
on the other end can be either LACP
Active
or LACP
Passive
. This command
enables the switch to automatically establish a dynamic LACP trunk group
when the device ports on the other end of the link are configured for LACP
Passive
.
Switch “A”
with ports set
to LACP
passive (the
default).
Switch “B”
with ports set
to LACP
passive (the
default).
Dynamic LACP trunk cannot automatically form because both
ends of the links are LACP passive.
(In this case STP blocking is needed to prevent a loop.
Switch “A”
with ports set
to LACP
active.
Switch “B”
with ports set
to LACP
passive (the
default).
Dynamic LACP trunk automatically forms because both
ends of the links are LACP and at least one end is LACP
active. (STP is not needed, and the clear advantages are
increased bandwidth and fault-tolerance.)
Figure 12-7. Example of Criteria for Automatically Forming a Dynamic LACP Trunk
Syntax : interface < port-list > lacp active
This example uses ports C4 and C5 to enable a dynamic LACP trunk group.
ProCurve(config)# interface c4-c5 lacp active
Removing Ports from a Dynamic LACP Trunk Group. To remove a port
from dynamic LACP trunk operation, you must turn off LACP on the port. (On
a port in an operating, dynamic LACP trunk, you cannot change between LACP
Active
and LACP
passive
without first removing LACP operation from the
port.)
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