NOTE
On Brocade ICX 7450 and Brocade ICX 7250-24G, the command options
10-half
and
100-half
are not
supported on 1G fiber ports with mini-GBIC (SFPs) for copper.
Force Mode Configuration Considerations
The following considerations apply to the force mode configuration.
• When a local partner issues a
speed-dup 100-full
or
speed-dup 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 InErrors such as CRC, Fragment or Bad packets.
• When a local partner issues a
speed-dup 100-full
or
speed-dup 10-full
command, if the remote
partner issues the same command, the port may or may not come up, since 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 a local partner is a force mode configuration such as 100-full/half or 10-full-half and the remote
partner is also a force mode configuration, for example, ICX6610-24F 1/1/1 (local link 100-full)<-
>(100-full remote link) FCX 1/1/1, if another force mode in a local or remote partner such as 10-full is
entered, the remote or local partner link may or may not come up. This is an IEEE force mode
standard. To resolve force mode changing, it is recommended that you change to auto mode first on
one side before switching to another force mode configuration.
MDI and MDIX configuration
Brocade devices support automatic Media Dependent Interface (MDI) and Media Dependent Interface
Crossover (MDIX) detection on all Gbps Ethernet Copper ports.
MDI/MDIX is a type of Ethernet port connection using twisted pair cabling. The standard wiring for end
stations is MDI, whereas the standard wiring for hubs and switches is MDIX. MDI ports connect to MDIX
ports using straight-through twisted pair cabling. For example, an end station connected to a hub or a
switch uses a straight-through cable. MDI-to-MDI and MDIX-to-MDIX connections use crossover twisted
pair cabling. So, two end stations connected to each other, or two hubs or switches connected to each
other, use crossover cable.
The auto MDI/MDIX detection feature can automatically correct errors in cable selection, making the
distinction between a straight-through cable and a crossover cable insignificant.
MDI and MDIX configuration notes
• This feature applies to copper ports only.
• The
mdi-mdix mdi
and
mdi-mdix mdix
commands work independently of auto-negotiation. Thus,
these commands work whether auto-negotiation is turned ON or OFF.
MDI and MDIX configuration syntax
The auto MDI/MDIX detection feature is enabled on all Gbps copper ports by default. For each port, you
can disable auto MDI/MDIX, designate the port as an MDI port, or designate the port as an MDIX port.
To turn off automatic MDI/MDIX detection and define a port as an MDI only port.
device(config-if-e1000-2)# mdi-mdix mdi
MDI and MDIX configuration
FastIron Ethernet Switch Administration Guide
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