ECS4660-28F_Management Guide-R03

C HAPTER 31 | Interface Commands
Interface Configuration
– 1192 –
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 802.3-2002 (formally IEEE 802.3x) for full-duplex operation.
◆ To force flow control on or off (with the flowcontrol or no flowcontrol
command), use the no negotiation command to disable auto-
negotiation on the selected interface.
◆ When using the negotiation command to enable auto-negotiation, the
optimal settings will be determined by the capabilities command. To
enable flow control under auto-negotiation, “flowcontrol” must be
included in the capabilities list for any port
EXAMPLE
The following example enables flow control on port 5.
Console(config)#interface ethernet 1/5
Console(config-if)#flowcontrol
Console(config-if)#no negotiation
Console(config-if)#
RELATED COMMANDS
negotiation (1194)
capabilities (flowcontrol, symmetric) (1189)
history This command configures a periodic sampling of statistics, specifying the
sampling interval and number of samples. Use the no form to remove a
named entry from the sampling table.
SYNTAX
history name interval buckets
no history name
name - A symbolic name for this entry in the sampling table.
(Range: 1-32 characters)
interval - The interval for sampling statistics. (Range: 1-1440
minutes.
buckets - The number of samples to take. (Range: 1-96)
DEFAULT SETTING
15min - 15 minute interval, 96 buckets