Allied Telesis AT-9408LC/SP Series, Руководство по установке

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AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
53
Cabling the Switch
Observe the following guidelines when connecting a twisted pair or fiber
optic cable to a port on the switch:
ˆ
The connector on the cable should fit snugly into the port on the
switch. The tab on the connector should lock the connector into place.
ˆ
Because the twisted pair ports on the switch are auto-MDI/MDI-X, you
can use a straight-through twisted pair cable to connect any type of
network device to a port on the switch. If you disable Auto-Negotiation
on the port, the port defaults to MDI-X. For instructions on how to
configure a port, refer to the
AT-S63 Management Software Menus
Interface User’s Guide , the AT-S63 Management Software Web
Browser Interface User’s Guide, or the AT-S63 Management Software
Command Line Interface User’s Guide .
ˆ
If your network topology contains a loop where two or more network
devices can communicate with each other over more than one network
path, do not connect the network cables forming the loop until after you
have activated a spanning tree protocol on the switch. Data loops can
adversely affect network performance. For background information on
the different types of spanning tree protocols supported by the switch,
refer to the
AT-S63 Management Software Menus Interface User’s
Guide .
ˆ
If you are creating a port trunk, you must configure the switch’s
management software before connecting the cables of the trunk to the
switch. Otherwise, a network loop will result which can adversely affect
network performance. For background information on the types of port
trunks supported by the switch, refer to the
AT-S63 Management
Software Menus Interface User’s Guide .
ˆ
In order for a switch port to successfully autonegotiate its duplex mode
with an end node, the end node should also be using Auto-Negotiation.
Otherwise, a duplex mode mismatch can occur. A switch port using
Auto-Negotiation defaults to half-duplex if it detects that the end node
is not using Auto-Negotiation. This can result in a mismatch if the end
node is operating at a fixed duplex mode of full-duplex.
To avoid this problem, disable Auto-Negotiation on a switch port and
set the port’s speed and duplex mode manually if the end node has a
fixed duplex mode of full-duplex.