Enabling port speed down-shift
Enable port speed down-shift on a port that has auto-negotiation enabled.
1. At the Global CONFIG level of the CLI, enter the following:
Brocade(config)# link-config gig copper autoneg-control down-shift ethernet 1
ethernet 2
The above command configures Gbps copper ports 1 and 2 to establish a link at 1000 Mbps over a
4-pair wire when possible, or to down-shift (reduce the speed) to 100 Mbps when the medium is a
2-pair wire.
Syntax:
[no] link-config gig copperautoneg-control
down-shift
ethernet
port
[
ethernet
port
]
to
port
2. Specify the port variable in one of the following formats:
• FWS and FCX stackable switches –
<stack-unit/slotnum/portnum>
• FSX 800 and FSX 1600 chassis devices –
<slotnum/portnum>
• FESX compact switches –
<portnum>
NOTE
To list all of the ports individually, use the keyword in order to specify ranges of ports, or a
combination of both. You can enable port speed down-shift on one or two ports at a time.
3. To disable port speed down-shift, enter the no form of the command.
Force mode configuration
You can manually configure a 10/100 Mbps port to accept either full-duplex (bi-directional) or half-
duplex (uni-directional) traffic.
NOTE
You can modify the port duplex mode of copper ports only. This feature does not apply to fiber ports.
Port duplex mode and port speed are modified by the same command.
Force mode configuration syntax
To change the port speed of interface 8 from the default of 10/100/1000 auto-sense to 10 Mbps
operating at full-duplex, enter the following.
device(config)
# interface ethernet 8
device(config-if-e1000-8)# speed-duplex 10-full
Syntax:
speed-duplex
value
The value can be one of the following:
• 10-full
• 10-half
• 100-full
• 100-half
• auto (default)
Enabling port speed down-shift
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FastIron Ethernet Switch Administration Guide
53-1003625-01