SMC Networks SMC TigerStack II SMC6624M - Manual (Page 102)

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Optimizing Port Usage Through Traffic Control and Port Trunking
Port Trunking
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Port Connections and Configuration: All port trunk links must be point-
to-point connections between the SMC6624M and another switch, router,
server, or workstation configured for port trunking. No intervening, non-
trunking devices are allowed. It is important to note that ports on both ends
of a port trunk group must have the same mode (speed and duplex) and flow
control settings.
N o t e Link Connections. The switch does not support port trunking through an
intermediate, non-trunking device such as a hub, or using more than one media
type in a port trunk group. Similarly, all links in the same trunk group must
have the same speed, duplex, and flow control.
Port Security Restriction. Port security does not operate on a trunk group.
If you configure port security on one or more ports that are later added to a
trunk group, the switch will reset the port security parameters for those ports
to the factory-default configuration.
C a u t i o n To avoid broadcast storms or loops in your network while configuring a
trunk, first disable or disconnect all ports you want to add to or remove from
the trunk. After you finish configuring the trunk, enable or re-connect the
ports.
SMC6624M Port Trunk Features and Operation
The SMC6624M switch offers these options for port trunking:
■ LACP (IEEE 802.3ad—page 6-23)
■ Trunk (non-protocol—page 6-26)
■ FEC (Fast EtherChannel®—page 6-26)
The SMC6624M switch supports one trunk group of up to four ports. (Using
the Link Aggregation Control Protocol—LACP—option, you can include
standby trunked ports in addition to the maximum of four actively trunking
ports.)
L A C P N o t e LACP operation requires full-duplex (FDx) links. For most installations, SMC
recommends that you leave the port Mode settings at
Auto (the default). LACP
also operates with Auto-10 (if negotiation selects HDx), 10FDx, 100FDx, and
1000FDx settings.