Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring Interfaces (Rev. 03)
Fast Ethernet and Giga Ethernet Port
© 2008 Foundry Networks, Inc.
Page 12 of 57
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Maximum Packet Size = 512
Setting Remote Fault Detection
The
remote-fault-detect
command, in Interface Configuration mode, enables remote fault
detection on the configured interface that is connected to a 100Base Fiber pair.
When remote fault detection is enabled on such an interface, the device indicates link down on the
port if the remote peer detects link down.
NOTE
The
remote-fault-detect
command is available only on 100Base Fiber ports.
Command Syntax
device-name
(config-if
UU/SS/PP
)#
remote-fault-detect
{
on
|
off
}
Argument Description
on
Enables the remote fault detection.
off
Disables the remote fault detection.
Setting Port Crossover
The
crossover
command, in Interface Configuration mode, sets the port crossover type to
MDI/MDIX or enables automatic detection of transmit/receive twisted pairs of the Ethernet cable.
The
no
form of this command sets the crossover detection to automatic mode.
MDI/MDIX is a type of Ethernet port connection according to the IEEE 802.3 standard using
twisted pair cabling. Network adapter cards on computers and workstations generally connect to
the network via RJ-45 interface ports that use pins 1 and 2 for transmit and 3 and 6 for receive.
Uplink ports on hubs and switches use the same pin assignments. Such ports are called Medium
Dependent Interface (MDI) ports. Normal ports on hubs and switches use the opposite pin
assignment, i.e. – pins 1 and 2 are used for receive and pins 3 and 6 are used for transmit. Such
ports are called MDIX (MDI-crossed) ports.
In order to feed the transmitted data from one end of the connection to the receive pins on the other
end:
•
MDI (computers and uplink) ports are connected to MDIX (hub or switch) ports via straight-
through twisted pairs.
•
MDIX (normal) ports on switches or hubs are connected to other MDIX ports via a crossover
cable.