Cisco IOS XR Interface and Hardware Component Command Reference, Release 3.3 - Ethernet Interface Commands on Cisco IOS XR Software [Cisco IOS XR Software (End-of-Sale)]

Table Of Contents

Ethernet Interface Commands on Cisco IOS XR Software

carrier-delay

clear mac-accounting (Ethernet)

duplex full (Fast Ethernet)

duplex half (Fast Ethernet)

flow-control

interface fastethernet

interface GigabitEthernet

interface TenGigE

loopback (Ethernet)

mac-accounting

mac-address (Ethernet)

negotiation auto

packet-gap non-standard

show mac-accounting (Ethernet)

speed (Fast Ethernet Interface)

Ethernet Interface Commands on Cisco IOS XR Software

This module describes the Cisco IOS XR commands used to configure the Ethernet interfaces.

carrier-delay

To delay the processing of hardware link down notifications, use the carrier-delay command in interface configuration mode.

carrier-delay msec milliseconds
Syntax Description

milliseconds

Length of time, in milliseconds, to delay the processing of hardware link down notifications. Range is from 1 through 5000.

Defaults

No carrier-delay is used, and the upper layer protocols are notified as quickly as possible when a physical link goes down

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.2

This command was first introduced on the Cisco CRS-1 and Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

When you delay the processing of hardware link down notifications, low layer link recovery systems can attempt to restore down links before the upper layer routing protocols even become aware that a hardware link is down.

If the carrier-delay command is configured on a physical link that fails and cannot be recovered, link down detection is increased, and it may take longer for the routing protocols to re-route traffic around the failed link.

In the case of very small interface state flaps, running the carrier-delay command prevents the routing protocols from experiencing a route flap.

Note Enter the show interface command to see the current state of the carrier-delay operation for an interface. No carrier-delay information is displayed if carrier-delay has not been configured on an interface.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to delay the processing of hardware link down notifications:
RP/0/RP0/CPU0:router(config-if)# carrier-delay msec 200
Related Commands

Command

Description

dampening

Limits propagation of transient or frequently changing interface states on Interface Manager (IM) clients.

delay trigger

Configures SONET line delay trigger values.

clear mac-accounting (Ethernet)

To clear Media Access Control (MAC) accounting statistics, use the clear mac-accounting command in EXEC mode.

clear mac-accounting {GigabitEthernet | TenGigE | fastethernet} instance [location instance]
Syntax Description

{GigabitEthernet | TenGigE | fastethernet}

Type of Ethernet interface whose MAC accounting statistics you want to clear. Enter GigabitEthernet, TenGigE, or fastethernet.

Note Fast Ethernet interfaces are available only on the Cisco XR 12000 Series Router.

instance

Designated node for which you want to clear MAC accounting statistics. The instance argument is entered in the rack/slot/module/port notation.

location instance

(Optional) Clears MAC accounting statistics for the designated node. The instance argument is entered in the rack/slot/module/port notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 2.0

This command was first introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

interface

read, write

basic-services

read, write

Examples

The following example shows how to clear all MAC accounting statistics for the TenGigE port at 1/0/0/1:
RP/0/RP0/CPU0:router# clear mac-accounting TenGigE 0/1/5/0 location 1/0/0/1
Related Commands

Command

Description

mac-accounting

Configures MAC accounting on an interface.

show mac-accounting (Ethernet)

Displays MAC accounting statistics for an interface.

duplex full (Fast Ethernet)

To configure full-duplex operation on a Fast Ethernet interface, use the duplex full command in interface configuration mode. To return the system to autonegotiate duplex operation, use the no form of the duplex full command.

duplex full
no duplex full
Syntax Description

This command has no arguments or keywords.

Defaults

Autonegotiates duplex operation

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

No modification.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The duplex full command automatically replaces the duplex half command if half duplex was previously configured on your router.

Note The duplex full command and the duplex half command cannot be configured simultaneously.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to set the Fast Ethernet interface at full duplex:
RP/0/RP0/CPU0:router(config)# interface mgmteth 0/RP0/CPU0/0
RP/0/RP0/CPU0:router(config-if)# duplex full
Related Commands

Command

Description

duplex half (Fast Ethernet)

Configures half-duplex operation on a Fast Ethernet interface.

show interfaces

Displays statistics for all interfaces configured on the router.

speed (Fast Ethernet Interface)

Configures the speed for a Fast Ethernet interface.

duplex half (Fast Ethernet)

To configure half-duplex operation on a Fast Ethernet interface, use the duplex half command in interface configuration mode. To return the system to autonegotiate duplex operation, use the no form of the duplex half command.

duplex half
no duplex half
Syntax Description

This command has no arguments or keywords.

Defaults

Autonegotiates duplex operation

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

No modification.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The duplex half command automatically replaces the duplex full command if full duplex was previously configured on your router.

Note The duplex half command and the duplex full command cannot be configured simultaneously.

Task ID

Task ID

Operations

interface

read, write

Examples

The following examples shows how to set the Fast Ethernet interface at half duplex:
RP/0/RP0/CPU0:router(config)# interface mgmteth 0/RP0/CPU0/0
RP/0/RP0/CPU0:router(config-if)# duplex half
Related Commands

Command

Description

duplex full (Fast Ethernet)

Configures full-duplex operation on a Fast Ethernet interface.

show interfaces

Displays statistics for all interfaces configured on the router.

speed (Fast Ethernet Interface)

Configures the speed for a Fast Ethernet interface.

flow-control

To enable the sending of flow-control pause frames, use the flow-control command in interface configuration mode. To disable flow control, use the no form of this command.

flow-control {bidirectional | egress | ingress}
no flow-control ingress {bidirectional | egress | ingress}
Syntax Description

bidirectional

Sends flow-control pause frames for both ingress and egress traffic.

egress

Sends flow-control pause frames for egress traffic.

ingress

Sends flow-control pause frames for ingress traffic.

Defaults

If autonegotiate is enabled on the interface, then the default is negotiated.

If autonegotiate is disabled on the interface, then the sending of flow-control pause frames is disabled for both egress and ingress traffic.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.0

This command was introduced on the Cisco CRS-1.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Note When you explicitly enable the sending of flow-control pause frames, the value you configured with the flow-control command overrides any autonegotiated value. This prevents a link from coming up if the value you set with the flow-control command conflicts with the allowable settings on the other end of the connection.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to enable the sending of flow-control pause frames for ingress traffic on the TenGigE interface 0/3/0/0:
RP/0/RP0/CPU0:router(config)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-if)# flow-control ingress
Related Commands

Command

Description

show interfaces

Displays statistics for all interfaces configured on the router.

interface fastethernet

To create a Fast Ethernet interface, use the interface fastethernet command in global configuration mode. To delete a Fast Ethernet interface, use the no form of this command.

interface fastethernet instance
no interface fastethernet instance
Syntax Description

instance

Either a physical interface instance or a virtual interface instance:

•Physical interface instance. Naming notation is rack/slot/module/port, and a slash between values is required as part of the notation.

–rack—Chassis number of the rack.

–slot—Physical slot number of the card.

–module—Module number. A physical layer interface module (PLIM) is always 0.

–port—Physical port number of the interface.

•Virtual interface instance. Range of numbers varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

Defaults

No default behavior or values

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1 and the Cisco XR 12000 Series Router.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to create a Fast Ethernet interface:
RP/0/RP0/CPU0:router(config)# interface fastethernet 0/2/0/0
RP/0/RP0/CPU0:router(config-if)#
interface GigabitEthernet

To create a Gigabit Ethernet interface, use the interface GigabitEthernet command in global configuration mode. To delete a Gigabit Ethernet interface, use the no form of this command.

interface GigabitEthernet instance
no interface GigabitEthernet instance
Syntax Description

instance

Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack—Chassis number of the rack.

–slot—Physical slot number of the card.

–module—Module number. A physical layer interface module (PLIM) is always 0.

–port—Physical port number of the interface.

Note For more information about the syntax for the router, use the question mark (?) online help function.

Defaults

No default behavior or values

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to create a Gigabit Ethernet interface:
RP/0/0/CPU0:router(config)# interface GigabitEthernet 0/4/0/0
RP/0/0/CPU0:router(config-if)#
interface TenGigE

To enter interface configuration mode for the 10-Gigabit Ethernet interface, use the interface TenGigE command in global configuration mode. To delete a 10-Gigabit Ethernet interface configuration, use the no form of this command.

interface TenGigE instance
no interface TenGigE instance
Syntax Description

instance

Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

–rack—Chassis number of the rack.

–slot—Physical slot number of the card.

–module—Module number. A physical layer interface module (PLIM) is always 0.

–port—Physical port number of the interface.

Note For more information about the syntax for the router, use the question mark (?) online help function.

Defaults

No default behavior or values

Command Modes

Global configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to enter interface configuration mode for a 10-Gigabit Ethernet interface:
RP/0/RP0/CPU0:router(config)# interface TenGigE 0/1/0/0
RP/0/RP0/CPU0:router(config-if)#
loopback (Ethernet)

To configure an Ethernet controller for loopback mode, use the loopback command in interface configuration mode. To disable loopback, use the no form of this command.

loopback {external | internal | line}
no loopback
Syntax Description

external

All IPv4 self-ping packets are sent out of the interface and looped back externally before being received on the ingress path.

internal

All packets will be looped back internally within the router before reaching an external cable.

line

Incoming network packets will be looped back through the external cable.

Defaults

Loopback mode is disabled.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.0

This command was introduced on the Cisco CRS-1.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The loopback command is available for all Ethernet interface types (Gigabit Ethernet, 10-Gigabit Ethernet, and Fast Ethernet).

Two loopback operation modes are supported for diagnostic purposes: internal and line. In the terminal (internal) loopback, the sent signal is looped back to the receiver. In the facility (line) loopback, the signal received from the far end is looped back and sent on the line. The two loopback modes cannot be active at the same time. In normal operation mode, neither of the two loopback modes is enabled.

Tip Use the loopback external command when an external loopback connector is attached to the interface.

Task ID

Task ID

Operations

interface

read, write

Examples

In the following example, all packets are looped back to the TenGigE controller:
RP/0/RP0/CPU0:router(config)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-if)# loopback internal
mac-accounting

To generate accounting information for IP traffic based on the source and destination Media Access Control (MAC) addresses on LAN interfaces, use the mac-accounting command in interface configuration mode. To disable MAC accounting, use the no form of this command.

mac-accounting {egress | ingress}
Syntax Description

egress

Generates accounting information for IP traffic based on the destination MAC addresses (egress direction).

ingress

Generates accounting information for IP traffic based on the source MAC addresses (ingress direction).

Defaults

MAC accounting is disabled

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.0

This command was first introduced on the Cisco CRS-1.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The mac-accounting command calculates the total packet and byte counts for a LAN interface that receives or sends IP packets to or from a unique MAC address.

Note Some 10-Gigabit Ethernet (TenGigE) modular services cards support only ingress MAC accounting, in which case the egress keyword is unavailable.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to enable MAC accounting for the source MAC address on the ingress direction:
RP/0/RP0/CPU0:router(config-if)# mac-accounting ingress
Related Commands

Command

Description

clear mac-accounting (Ethernet)

Clears MAC accounting statistics for a specified interface.

show mac-accounting (Ethernet)

Displays MAC accounting statistics for a specified interface.

mac-address (Ethernet)

To set the MAC layer address of an Ethernet interface, use the mac-address command in interface configuration mode. To return the device to its default MAC address, use the no form of this command.

mac-address value1.value2.value3
no mac-address
Syntax Description

value1.

High 2 bytes of the MAC address in hexadecimal format. Range is from 0 to ffff.

value2.

Middle 2 bytes of the MAC address in hexadecimal. Range is from 0 to ffff.

value3

Low 2 bytes of the MAC address in hexadecimal. Range is from 0 to ffff.

Defaults

The default MAC address is read from the hardware burned-in address (BIA).

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

No modification.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The MAC address must be in the form of three 4-digit values (12 digits in dotted decimal notation).

The mac-address command is available for all types of line card Ethernet interfaces (Gigabit Ethernet, 10-Gigabit Ethernet, Fast Ethernet) and for the Management Ethernet interface.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to set the MAC address of a Gigabit Ethernet interface located at 0/1/5/0:
RP/0/RP0/CPU0:router(config)# interface GigabitEthernet 0/1/5/0 
RP/0/RP0/CPU0:router(config-if)# mac-address 0001.2468.ABCD
negotiation auto

To enable link autonegotiation on Gigabit Ethernet and Fast Ethernet interfaces, use the negotiation auto command in interface configuration mode. To disable link autonegotiation, use the no form of this command.

negotiation auto
no negotiation auto
Syntax Description

This command has no arguments or keywords.

Defaults

Link autonegotiation is disabled.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced on the Cisco CRS-1 and the Cisco XR 12000 Series Router.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

The negotiation auto command is available on Gigabit Ethernet and Fast Ethernet interfaces only.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to enable link autonegotiation on a Cisco CRS-1:
RP/0/RP0/CPU0:router(config)# interface fastethernet 0/0/2/0
RP/0/RP0/CPU0:router(config-if)# negotiation auto
The following example shows how to disable link autonegotiation on a Cisco CRS-1:
RP/0/RP0/CPU0:router(config)# interface fastethernet 0/0/2/0
RP/0/RP0/CPU0:router(config-if)# no negotiation auto
packet-gap non-standard

To change the packet interval for traffic on an interface for improved interoperability with
Cisco Catalyst 6000 series switches, use the packet-gap non-standard command in interface configuration mode. To use the standard packet interval as defined by the IEEE 802.ae specification, use the no form of this command.

packet-gap non-standard
no packet-gap non-standard
Syntax Description

This command has no arguments or keywords.

Defaults

The interface uses the standard packet interval as defined by the IEEE 802.ae specification.

Command Modes

Interface configuration

Command History

Release

Modification

Release 3.0

This command was first introduced on the Cisco CRS-1.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

An interface that is connected to a Cisco Catalyst 6000 series switch may experience packet loss problems that can be resolved by changing the packet interval of traffic from standard (as defined by the IEEE 802.ae specification) to nonstandard using the packet-gap non-standard command.

Note The packet-gap non-standard command is available on 10-Gigabit Ethernet interfaces only.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to change the packet interval for traffic on an interface from standard to nonstandard:
RP/0/RP0/CPU0:router(config)# interface TenGigE 0/3/0/0
RP/0/RP0/CPU0:router(config-if)# packet-gap non-standard
show mac-accounting (Ethernet)

To display MAC accounting statistics for an interface, use the show mac-accounting command in EXEC mode.

show mac-accounting {GigabitEthernet | TenGigE | fastethernet} instance [location instance]
Syntax Description

{GigabitEthernet | TenGigE| fastethernet}

Indicates the type of Ethernet interface whose MAC accounting statistics you want to display. Enter GigabitEthernet, TenGigE, or fastethernet.

Note Fast Ethernet interfaces are available only on the Cisco XR 12000 Series Router.

instance

(Optional) Displays detailed MAC accounting information for the specified interface. The instance argument is entered in the rack/slot/module/port notation.

location instance

(Optional) Displays detailed MAC accounting information for the specified interface on the specified node. The instance argument is entered in the rack/slot/module/port notation.

Defaults

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.0

This command was first introduced on the Cisco CRS-1.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Task ID

Task ID

Operations

interface

read

Examples

The following is sample output from the show mac-accounting command, which displays MAC accounting statistics on the specified interface:
RP/0/RP0/CPU0:router# show mac-accounting TenGigE 0/2/0/4 location 0/1/CPU0
TenGigE0/2/0/4
  Input (511 free)
	000b.4558.caca: 4 packets, 456 bytes
             Total: 4 packets, 456 bytes
Table 77 describes the significant fields shown in the display.

Table 77 show mac-accounting Field Descriptions

Field

Description

Interface

The interface from which the statistics are generated.

Input

Heading for the ingress MAC accounting statistics. The number of MAC accounting entries still available is shown in parentheses.

Total

Total statistics for the traffic accounted for by MAC accounting. This excludes any traffic for which there is no MAC address entry, such as non-IP traffic from an unknown MAC source address.

Related Commands

Command

Description

clear mac-accounting (Ethernet)

Clears MAC accounting statistics.

mac-accounting

Generates MAC accounting statistics.

speed (Fast Ethernet Interface)

To configure the speed for a Fast Ethernet interface, enter the speed command in interface configuration mode. To return the system to autonegotiate speed, use the no form of this command.

speed {10 | 100 | 1000}
no speed
Syntax Description

10

Configures the interface to transmit at 10 Mbps.

100

Configures the interface to transmit at 100 Mbps.

1000

Configures the interface to transmit at 1000 Mbps (1 Gbps).

Defaults

If autonegotiation is enabled on an interface, then the default speed is negotiated.

If autonegotiation is disabled on an interface, then the default speed is the maximum speed allowed on the interface.

Command Modes

Interface configuration

Command History

Release

Modification

Release 2.0

This command was introduced on the Cisco CRS-1.

Release 3.0

No modification.

Release 3.2

This command was first supported on the Cisco XR 12000 Series Router.

Release 3.3.0

No modification.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. For detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS XR Software module of the Cisco IOS XR System Security Configuration Guide.

Note The speed command is available on Management Ethernet interfaces and Fast Ethernet interfaces only.

Note Keep in mind that both ends of a link must have the same interface speed. A manually configured interface speed overides any autonegotiated speed, which can prevent a link from coming up if the configured interface speed at one end of a link is different from the interface speed on the other end.

Table 78 describes the performance of the system for different combinations of the duplex and speed modes. The specified duplex command configured with the specified speed command produces the resulting system action.

Table 78 Relationship Between duplex and speed Commands

duplex Command

speed Command

Resulting System Action

no duplex

no speed

Autonegotiates both speed and duplex modes.

no duplex

speed 1000

Forces 1000 Mbps (1 Gbps) and full duplex.

no duplex

speed 100

Autonegotiates for duplex mode and forces 100 Mbps.

no duplex

speed 10

Autonegotiates for duplex mode and forces 10 Mbps.

duplex full

no speed

Forces full duplex and autonegotiates for speed.

duplex full

speed 1000

Forces 1000 Mbps (1 Gbps) and full duplex.

duplex full

speed 100

Forces 100 Mbps and full duplex.

duplex full

speed 10

Forces 10 Mbps and full duplex.

duplex half

no speed

Forces half duplex and autonegotiates for speed (10 or 100 Mbps.)

duplex half

speed 100

Forces 100 Mbps and half duplex.

duplex half

speed 10

Forces 10 Mbps and half duplex.

.

Task ID

Task ID

Operations

interface

read, write

Examples

The following example shows how to configure the Fast Ethernet interface to transmit at one gigabit:
RP/0/RP0/CPU0:router(config)# interface fastethernet 0/0/2/0
RP/0/RP0/CPU0:router(config-if)# speed 1000