Changing the default gigabit negotiation mode, Changing the negotiation mode, Disabling or re-enabling flow control – Brocade BigIron RX Series Configuration Guide User Manual
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BigIron RX Series Configuration Guide
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Changing the default Gigabit negotiation mode
6
Syntax: enable
Changing the default Gigabit negotiation mode
You can configure the default Gigabit negotiation mode to be one of the following:
•
auto-full - The port tries to perform a negotiation with its peer port to exchange capability
information. If it is unable to reach an agreen upon speed, the port goes into a fixed speed and
keeps the link up
•
neg-full-auto – The port first tries to perform a negotiation with its peer port to exchange
capability information. If the other port does not respond, the port reverts to the
Negotiation-off state.
•
auto-gig – The port tries to perform a negotiation with its peer port to exchange capability
information. if it is unable to reach an agreed upon speed it brings the link down. This is the
default state.
•
neg-off – The port does not try to perform a negotiation with its peer port.
Unless the ports at both ends of a Gigabit Ethernet link use the same mode (either auto-gig or
neg-off), the ports cannot establish a link. An administrator must intervene to manually configure
one or both sides of the link to enable the ports to establish the link.
Changing the negotiation mode
To change the mode for individual ports, enter commands such as the following.
BigIron RX(config)# interface ethernet 4/1 to 4/4
BigIron RX(config-mif-4/1-4/4)# gig-default neg-off
This command changes the default auto-gig setting and sets the negotiation mode to neg-off for
ports 4/1 – 4/4.
Syntax: gig-default auto-full | neg-full-auto | auto-gig | neg-off
Default is gig-default auto-gig
The auto-full, neg-full-auto, auto-gig, and neg-off options are as described above.
Disabling or re-enabling flow control
You can configure full-duplex ports on a system to operate with or without flow control (802.3x).
Flow control is enabled by default.
To disable flow control on full-duplex ports on a system, enter the following.
BigIron RX(config)# no flow-control
To turn the feature back on.
BigIron RX(config)# flow-control
Syntax: [no] flow-control