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NTERFACE
C
OMMANDS
4-191
Command Usage
When auto-negotiation is enabled with the negotiation command, the
switch will negotiate the best settings for a link based on the capabilites
command. When auto-negotiation is disabled, you must manually specify
the link attributes with the speed-duplex and flowcontrol commands.
Example
The following example configures Ethernet port 5 capabilities to 100half and
100full.
Related Commands
negotiation (4-189)
speed-duplex (4-188)
flowcontrol (4-191)
flowcontrol
30
This command enables flow control. Use the no form to disable flow
control.
Syntax
[no] flowcontrol
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• Flow control can eliminate frame loss by “blocking” traffic from end
stations or segments connected directly to the switch when its buffers
fill. When enabled, back pressure is used for half-duplex operation and
IEEE 802.3x for full-duplex operation.
Console(config)#interface ethernet 1/5
Console(config-if)#capabilities 100half
Console(config-if)#capabilities 100full
Console(config-if)#
30. There are interoperability problems between Flow Control and Head-of-Line (HOL) blocking for the
switch ASIC; Flow Control is therefore not supported for this switch.