C
HAPTER
30
| Interface Commands
– 771 –
COMMAND USAGE
The alias is displayed in the running-configuration file. An example of the
value which a network manager might store in this object for a WAN
interface is the (Telco's) circuit number/identifier of the interface.
EXAMPLE
The following example adds an alias to port 4.
Console(config)#interface ethernet 1/4
Console(config-if)#alias finance
Console(config-if)#
capabilities This command advertises the port capabilities of a given interface during
auto-negotiation. Use the no form with parameters to remove an
advertised capability, or the no form without parameters to restore the
default values.
SYNTAX
[no] capabilities {1000full | 100full | 100half | 10full | 10half |
flowcontrol | symmetric}
1000full - Supports 1 Gbps full-duplex operation
100full - Supports 100 Mbps full-duplex operation
100half - Supports 100 Mbps half-duplex operation
10full - Supports 10 Mbps full-duplex operation
10half - Supports 10 Mbps half-duplex operation
flowcontrol - Supports flow control
symmetric (Gigabit only) - When specified, the port transmits and
receives pause frames.
DEFAULT SETTING
1000BASE-T: 10half, 10full, 100half, 100full, 1000full
1000BASE-SX/LX/LH (SFP): 1000full
COMMAND MODE
Interface Configuration (Ethernet, Port Channel)
COMMAND USAGE
â—† The 1000BASE-T standard does not support forced mode. Auto-
negotiation should always be used to establish a connection over any
1000BASE-T port or trunk.
â—† When auto-negotiation is enabled with the negotiation command, the
switch will negotiate the best settings for a link based on the
capabilities command. When auto-negotiation is disabled, you must
manually specify the link attributes with the speed-duplex and
flowcontrol commands.
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