Contents

Loopback MAC swap commands· 1

display loopback swap-mac information· 1

loopback local swap-mac· 2

loopback remote swap-mac· 3

loopback swap-mac start 4

loopback swap-mac stop· 5

 

Loopback MAC swap commands

Loopback MAC swap is supported only in R6348P01 and later.

display loopback swap-mac information

Use display loopback swap-mac information to display loopback MAC swap test information.

Syntax

display loopback swap-mac information

Views

Any view

Predefined user roles

network-admin

network-operator

Examples

# Display local loopback MAC swap test information.

<Sysname> display loopback swap-mac information

  Loopback type             : local

  Loopback state            : running

  Loopback test times(s)    : 60

  Loopback interface        : GigabitEthernet1/0/1

  Loopback output interface : GigabitEthernet1/0/2

  Loopback source MAC       : 0001-0001-0001

  Loopback destination MAC  : 0002-0002-0002

  Loopback vlan             : 10

  Loopback inner vlan       : 0

  Loopback packets          : 0

  Drop packets              : 0

Table 1 Command output

Field	Description
Loopback type	Loopback MAC swap test type: ·     local—Local loopback MAC swap. ·     remote—Remote loopback MAC swap.
Loopback state	Loopback MAC swap test status: ·     running—The loopback MAC swap test is started. ·     stop—The loopback MAC swap test is stopped.
Loopback test time(s)	Timeout timer for the test. If the value for this field is none, you need to manually stop the test with the relevant command.
Loopback interface	Interface that swaps the source and destination MAC addresses in the test packets.
Loopback output interface	Interface that loops back the test packets.
Loopback source MAC	Source MAC address that the test packets are required to match.
Loopback destination MAC	Destination MAC address that the test packets are required to match.
Loopback vlan	VLAN ID that the test packets are required to match.
Loopbck inner vlan	Inner VLAN ID that the test packets are required to match.
Loopback packets	Number of received packets that match the specified test parameters.
Drop packets	This field is not supported in the current software version. Number of dropped packets that do not match the specified test parameters.

 

Related commands

loopback local swap-mac

loopback remote swap-mac

loopback local swap-mac

Use loopback local swap-mac to configure local loopback MAC swap parameters.

Use undo loopback local swap-mac to delete local loopback MAC swap parameters.

Syntax

loopback local swap-mac source-mac source-mac-address dest-mac dest-mac-address vlan vlan-id [ inner-vlan inner-vlan-id ] interface interface-type interface-number [ timeout { time-value | none } ]

undo loopback local swap-mac

Default

Local loopback MAC swap parameters are not configured.

Views

Ethernet interface view

Predefined user roles

network-admin

network-operator

Parameters

source-mac source-mac-address: Specifies the source MAC address that the test packets are required to match. The MAC address must be a unicast MAC address.

dest-mac dest-mac-address: Specifies the destination MAC address that the test packets are required to match. The MAC address must be a unicast MAC address.

vlan vlan-id: Specifies the VLAN ID that the test packets are required to match, in the range of 1 to 4094.

inner-vlan inner-vlan-id: Specifies the inner VLAN ID that the test packets are required to match, in the range of 1 to 4094. If you do not specify this option, the device does not match the inner VLAN ID of packets. interface interface-type interface-number: Specifies an interface by its type and number for looping back the test packets.

timeout { time-value | none }: Specifies the timeout timer for the test. After you start the loopback MAC swap test, the test automatically stops upon expiration of the timeout timer. The value range for the time-value argument is 5 to 300 seconds. If you specify the none keyword, the loopback MAC swap test does not automatically stop. You can only use the loopback swap-mac stop command to manually stop the test. By default, the timeout timer for the loopback MAC swap test is 60 seconds.

Usage guidelines

The device takes a packet as a test packet if its source MAC address, destination MAC address, VLAN ID, and inner VLAN ID match the settings configured in this command.

After configuring local loopback MAC swap parameters, you need to execute the loopback swap-mac start command to start the test. After starting the test, the tester sends test packets to the downlink interface on the tested device. The tested device swaps the source and destination MAC addresses in the test packets on the downlink interface, and then loops back the test packets to the tester through the specified interface. In this way, the network connectivity and quality information are obtained.

The test scope for local loopback MAC swap is the network from the tester to the downlink interface on the tested device (including the tested device).

Examples

# Configure local loopback MAC swap parameters.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] loopback local swap-mac source-mac 00e0-fc00-0085 dest-mac 00e0-fc00-1004 vlan 100 interface gigabitethernet 1/0/2

loopback remote swap-mac

Use loopback remote swap-mac to configure remote loopback MAC swap parameters.

Use undo loopback remote swap-mac to delete remote loopback MAC swap parameters.

Syntax

loopback remote swap-mac source-mac source-mac-address dest-mac dest-mac-address vlan vlan-id [ inner-vlan inner-vlan-id ] [ timeout { time-value | none } ]

undo loopback remote swap-mac

Default

Remote loopback MAC swap parameters are not configured.

Views

Ethernet interface view

Predefined user roles

network-admin

network-operator

Parameters

source-mac source-mac-address: Specifies the source MAC address that the test packets are required to match. The MAC address must be a unicast MAC address.

dest-mac dest-mac-address: Specifies the destination MAC address that the test packets are required to match. The MAC address must be a unicast MAC address.

vlan vlan-id: Specifies the VLAN ID that the test packets are required to match, in the range of 1 to 4094.

inner-vlan inner-vlan-id: Specifies the inner VLAN ID that the test packets are required to match, in the range of 1 to 4094. If you do not specify this option, the device does not match the inner VLAN ID of packets.

timeout { time-value | none }: Specifies the timeout timer for the test. After you start the loopback MAC swap test, the test automatically stops upon expiration of the timeout timer. The value range for the time-value argument is 5 to 300 seconds. If you specify the none keyword, the loopback MAC swap test does not automatically stop. You can only use the loopback swap-mac stop command to manually stop the test. By default, the timeout timer for the loopback MAC swap test is 60 seconds.

Usage guidelines

The device takes a packet as a test packet if its source MAC address, destination MAC address, VLAN ID, and inner VLAN ID match the settings configured in this command.

After configuring remote loopback MAC swap parameters, you need to execute the loopback swap-mac start command to start the test. After starting the test, the tester sends test packets to the uplink interface on the tested device. The tested device swaps the source and destination MAC addresses in the test packets on the uplink interface, and then loops back the test packets to the tester through the uplink interface. In this way, the network connectivity and quality information are obtained.

The test scope for remote loopback MAC swap is the network from the tester to the uplink interface on the tested device (excluding the tested device).

Examples

# Configure remote loopback MAC swap parameters.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] loopback local swap-mac source-mac 00e0-fc00-0085 dest-mac 00e0-fc00-1004 vlan 100

loopback swap-mac start

Use loopback swap-mac start to start the loopback MAC swap test.

Syntax

loopback swap-mac start

Views

Ethernet interface view

Predefined user roles

network-admin

network-operator

Usage guidelines

After configuring local or remote loopback MAC swap parameters, you need to execute the loopback swap-mac start command to start the test.

Both local and remote loopback MAC swap tests will affect normal operation of the network. As a best practice to minimize impact on the network, execute the loopback swap-mac stop command immediately to stop the test after it is completed.

Execute the loopback swap-mac start command again to start a new test if the previous test automatically stops upon expiration of the timeout timer or is manually stopped with the loopback swap-mac stop command.

Examples

# Start the loopback MAC swap test.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] loopback swap-mac start

loopback swap-mac stop

Use loopback swap-mac stop to stop the loopback MAC swap test.

Syntax

loopback swap-mac stop

Views

Ethernet interface view

Predefined user roles

network-admin

network-operator

Usage guidelines

After configuring local or remote loopback MAC swap parameters, you need to execute the loopback swap-mac start command to start the test.

Both local and remote loopback MAC swap tests will affect normal operation of the network. As a best practice to minimize impact on the network, execute the loopback swap-mac stop command immediately to stop the test after it is completed.

Execute the loopback swap-mac start command again to start a new test if the previous test automatically stops upon expiration of the timeout timer or is manually stopped with the loopback swap-mac stop command.

Examples

# Stop the loopback MAC swap test.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] loopback swap-mac stop