SMC Networks SMC TigerStack II SMC6624M - Manual (Page 117)

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Optimizing Port Usage Through Traffic Control and Port Trunking
Port Trunking
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LACP Notes and Restrictions
Changing Trunking Methods. The switch supports one trunk group. Thus,
a port belonging to an LACP dynamic trunk (Dyn1) cannot be configured as a
member of a static trunk (Trk1) without first eliminating the dynamic trunk.
Also, to convert a trunk from static to dynamic, you must first eliminate the
static trunk.
Static LACP Trunks. Where a port is configured for LACP (Active or
Passive), but does not belong to an existing trunk group, you can add that port
to a static trunk. Doing so disables dynamic LACP on that port, which means
you must manually configure both ends of the trunk.
VLANs and Dynamic LACP. A dynamic LACP trunk operates only in the
default VLAN unless you have enabled GVRP on the switch. If you want to use
LACP for a trunk on a non-default VLAN and GVRP is disabled, configure the
trunk as a static trunk.
STP and IGMP. If spanning tree (STP) and/or IGMP is enabled in the switch,
a dynamic LACP trunk operates only with the default settings for these
features and does not appear in the port listings for these features.
Port Status Up: The port has an active LACP link and is not blocked or in Standby mode.
Down: The port is enabled, but an LACP link is not established. This can indicate, for example, a port that
is not connected to the network or a speed mismatch between a pair of linked ports.
Disabled: The port cannot carry traffic.
Blocked: LACP, STP, or FEC has blocked the port. (The port is not in LACP Standby mode.) This may be
due to a trunk negotiation (very brief) or a configuration error such as differing port speeds on the same
link or attempting to connect the SMC6624M to more than one trunk.
Standby: The port is configured for dynamic LACP trunking, but the maximum number of ports for the
Dyn1 trunk has already been reached on either the SMC6624M or the device on the other end of the
trunked links. This port will remain in reserve, or “standby” unless LACP detects another, active link in
the trunk becomes disabled, blocked, or down. In this case, LACP automatically assigns a Standby port,
if available, to replace the failed port.
LACP Partner Yes: LACP is enabled on both ends of the link.
No: LACP is enabled on the SMC6624M, but is not enabled, or LACP has not been detected on the opposite
device.
LACP Status Success: LACP is enabled on the port, detects and synchronizes with a device on the other end of the
link, and can move traffic across the link.
Failure: LACP is enabled on a port and detects a device on the other end of the link, but is not able to
synchronize with this device, and therefore not able to send LACP packets across the link. This can be
caused, for example, by an intervening device on the link (such as a hub), a bad hardware connection,
or if the LACP operation on the opposite device does not comply with the IEEE 802.3ad standard.
Status Name Meaning