Allied Telesis SwitchBlade x3112 - Manual (Page 151)

SwitchBlade x3112 Installation Guide
151
Cabling the NET MGMT Port on the AT-SBx31CFC Card
The control card must have access to your network if you want to use any
of the management features in Table 14 on page 58. You can do this by
configuring the Inband Interface, which enables the card to use the
backplane and line cards to communicate with your network, or connecting
the NET MGMT port to a network device, such as a switch, router, or
workstation. (For instructions on how to configure the Inband Interface,
refer to the Software Reference for SwitchBlade x3100 Series Switches.)
Here are the guidelines to using the NET MGMT port:
 The cabling requirements of the port are the same as the ports on
the AT-SBx31GT24 Line Card, in Table 1 on page 36.
 If the chassis has two AT-SBx31CFC Line Cards, connect the NET
MGMT ports on both cards to network devices so that the inactive
card can perform the management functions if it becomes the
active card.
 The port uses Auto-Negotiation to set its speed and duplex. You
may not disable Auto-Negotiation. If you connect the port to a
network device that does not support Auto-Negotiation, it defaults
to 10 Mbps, half-duplex mode. To avoid a speed or duplex mode
mismatch, connect the port only to a device that also uses Auto-
Negotiation.
 You may connect the NET MGMT port to a port on one of the
Ethernet line cards in the chassis so that the control card
communicates with your network through the line cards. However,
you can achieve the same result by configuring the Inband
Interface instead, as explained in the Software Reference for
SwitchBlade x3100 Series Switches.
The wiring configuration of the port is set automatically with automatic
MDIX detection. You may not disable automatic MDIX detection. For
automatic MDIX detection to work successfully, the network device you
connect to the port must also support the feature. If it does not, the NET
MGMT port defaults to MDIX. This may entail the use of a crossover cable.
Here are the guidelines to choosing a straight-through or crossover cable
for the port:
 You may use a straight-through cable to connect the port to a
network device that operates at 1000 Mbps.
 You may use a straight-through or crossover cable to connect the
port to a network device that supports automatic MDIX detection
and that operates at 10 or 100 Mbps.
 You must use a straight-through cable to connect the port to a
network device that operates at 10 or 100 Mbps and has a fixed
wiring configuration of MDI.