Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 60)

Port speed and duplex mode configuration syntax
The following commands change the port speed of copper interface 8 on a FastIron device from the
default of 10/100/1000 auto-sense, to 100 Mbps operating in full-duplex mode.
device(config)# interface ethernet 8
device(config-if-e1000-8)# speed-duplex 100-full
Syntax: speed-duplex value
The value variable can be one of the following values:
• 10-full - 10 Mbps, full duplex
• 10-half - 10 Mbps, half duplex
• 100-full - 100 Mbps, full duplex
• 100-half - 100 Mbps, half duplex
• 1000-full-master - 1 Gbps, full duplex master
• 1000-full-slave - 1 Gbps, full duplex slave
• auto - auto-negotiation
The default is auto (auto-negotiation).
Use the no form of the command to restore the default.
NOTE
On FastIron devices, when setting the speed and duplex-mode of an interface to 1000-full, configure
one side of the link as master (1000-full-master) and the other side as slave (1000-full-slave).
NOTE
On Brocade ICX 6610 and ICX 6650 devices, after you remove the 10 Gbps speed from the running
configuration, plugging in a 1Gbps optic SFP transceiver into a 10 Gbps port causes the software to
fail to revert the ports back from the default 10Gbps mode to the 1 Gbps speed. Remove the 1Gbps
SFP transceiver and plug in the 10Gbps optic SFP+transceiver so that the devices go into the default
10 Gbps mode.
NOTE
When you use fixed speed and duplex configuration, you should use the non-auto MDI-MDIX
configuration.
Configuration considerations for port speed and duplex mode
The following considerations apply to the port speed and duplex mode configuration:
• When a local partner issues a speed-duplex 100-full or speed-duplex 10-full command, if the
remote partner does not issue the same commands, it becomes 100-half or 10-half, and may
receive collision errors. The local partner may receive In Errors such as CRC, fragments, or bad
packets.
• When a local partner issues a speed-duplex 100-full or speed-duplex 10-full command, if the
remote partner issues the same command, the port may or may not come up because both sides
enter the force mode and want to force the partner to accept these conditions. If both sides come
up, they may not receive any In or Out Errors.
• When both local and remote partners have a force mode configuration such as 100-full/half or 10-
full/half, for example, ICX6610-24F 1/1/1 (local link 100-full)<->(100-full remote link) FCX 1/1/1, if
another force mode such as 10-full is entered in a local or remote partner, the remote or local
partner link may or may not come up. This is an IEEE force mode standard. To resolve the force
Port speed and duplex mode configuration syntax
60 FastIron Ethernet Switch Administration Guide
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