25
Table of Contents
Linksys
25
Table of Contents
Linksys
•
Port Speed—Configure the speed of the port The port type determines
the available speeds You can designate this field only when port auto-
negotiation is disabled
•
Duplex Mode—Select the port duplex mode This field is configurable
only when auto-negotiation is disabled, and the port speed is set to 10M
or 100M At port speed of 1G, the mode is always full duplex The possible
options are:
•
Half—The interface supports transmission between the device and
the client in only one direction at a time
•
Full—The interface supports transmission between the device and
the client in both directions simultaneously
•
Auto Advertisement—Select the capabilities advertised by auto-negotiation
when it is enabled The optionsare as follows:
•
Max Capability—All port speeds and duplex mode settings can be accepted
•
10 Full Duplex—10 Mbps speed and Full Duplex mode
•
10 Half Duplex—10 Mbps speed and Half Duplex mode
•
100 Full Duplex—100 Mbps speed and Full Duplex mode
•
100 Half Duplex—100 Mbps speed and Half Duplex mode
•
1000 Full Duplex—1000 Mbps speed and Full Duplex mode
•
Back Pressure—Select the Back Pressure mode on the port (used with
Half Duplex mode) to slow down the packet reception speed when
the device is congested It disables the remote port, preventing it from
sending packets by jamming the signal
•
Flow Control—Enable or disable 802 3x Flow Control, or enable the auto-
negotiation of flow control on the port (only when in Full Duplex mode)
•
MDI/MDIX—the Media Dependent Interface (MDI)/Media Dependent
Interface with Crossover (MDIX) status on the port The options are
as follows:
•
MDIX—Select to swap the port’s transmit and receives pairs
•
MDI—Select to connect this device to a station by using a straight-
through cable
•
Auto—Select to configure this device to automatically detect the
correct pinouts for the connection to another device
•
Description—Enter the port description
STEP 5 Click Apply The port settings are written to the Running
Configuration file
Link Aggregation
This section describes how to configure LAGs It covers the following topics:
•
Overview
•
LAGs
Overview
Link Aggregation Control Protocol (LACP) is part of the IEEE specification
(802 3ad) that enables you to bundle several physical ports together to form
a single logical channel (LAG) LAGs multiply the bandwidth, increase port
flexibility, and provide link redundancy between two devices
Two types of LAGs are supported:
•
Static—A LAG is static if the LACP is disabled on it
The ports assigned to
a static LAG are always active members After a LAG is manually created,
the LACP option cannot be added or removed, until the LAG is edited and
a member is removed (which can be added prior to applying), then the
LACP button becomes available for editing
•
Dynamic—A LAG is dynamic if LACP is enabled on it The ports assigned
to dynamic LAG are candidate ports LACP determines which candidate
ports are active member ports The non-active candidate ports are
standby ports ready to replace any failing active member ports
Load Balancing
•
Traffic forwarded to a LAG is load-balanced across the active member
ports, thus achieving an effective bandwidth close to the aggregate
bandwidth of all the active member ports of the LAG
•
Traffic load balancing over the active member ports of a LAG is managed
by a hash-based distribution function that distributes Unicast and
Multicast traffic based on Layer 2 or Layer 3 packet header information
•
The device supports two modes of load balancing:
•
By MAC Addresses—(Default) Based on the destination and source MAC
•
addresses of all packets
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