This command can be configured only in Ethernet networks. You cannot specify a Layer 2 VPN service instance for the service-instance instance-id option.

Examples

# Configure the AIS frame transmission level as 3 in service instance 1.

<Sysname> system-view

[Sysname] cfd ais level 3 service-instance 1

Related commands

cfd ais enable

cfd ais period

Use cfd ais period to configure the AIS frame transmission period.

Use undo cfd ais period to remove the AIS frame transmission period.

NOTE:

This command is supported only in R3608 and later.

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Syntax

cfd ais period period-value service-instance instance-id

undo cfd ais period period-value service-instance instance-id

Default

The AIS frame transmission period is 1 second.

Views

System view

Predefined user roles

network-admin

Parameters

period period-value: Specifies the AIS frame transmission period in the range of 1 to 60 seconds.

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

Usage guidelines

This command can be configured in only Ethernet networks. You cannot specify a Layer 2 VPN service instance for the service-instance instance-id option.

Examples

# Configure the AIS frame transmission period as 60 seconds in service instance 1.

<Sysname> system-view

[Sysname] cfd ais period 60 service-instance 1

Related commands

cfd ais enable

cfd ais level

cfd cc enable

Use cfd cc enable to enable CCM sending on a specified MEP.

Use undo cfd cc enable to disable CCM sending on a specified MEP.

Syntax

cfd cc service-instance instance-id mep mep-id enable

undo cfd cc service-instance instance-id mep mep-id enable

Default

The CCM sending feature is disabled.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Layer 2 aggregate interface view

Layer 3 Ethernet subinterface view

Layer 2 Ethernet service instance view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies the service instance ID in the range of 1 to 32767.

mep mep-id: Specifies a MEP by its ID in the range of 1 to 8191.

Usage guidelines

Follow these guidelines when you use the command:

· Configurations in Ethernet interface view take effect only on the current interface.

· If the MEP belongs to an MA that does not carry the VLAN attribute, configurations on a member port of an aggregate interface take effect only on the current member port.

· If the MEP belongs to an MA that carries the VLAN attribute, configurations on a member port of an aggregate interface take effect only when the member port leaves the aggregation group.

In an Ethernet network, you can enable CCM sending only on Layer 2/Layer 3 Ethernet interfaces and Layer 2 aggregate interfaces.

In an MPLS Layer 2 VPN, you can enable CCM sending only on Layer 3 Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3 aggregate interfaces, Layer 3 aggregate subinterfaces, and Layer 2 Ethernet service instances.

Examples

# On HundredGigE 1/0/1, enable CCM sending on MEP 3 in service instance 5.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] cfd cc service-instance 5 mep 3 enable

# On HundredGigE 1/0/1.1, enable CCM sending on MEP 3 in service instance 5.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1.1

[Sysname-HundredGigE1/0/1.1] cfd cc service-instance 5 mep 3 enable

Related commands

cfd cc interval

Use cfd cc interval to set the value of the interval field in the CCM messages.

Use undo cfd cc interval to remove the value of the interval field in the CCM messages.

Syntax

cfd cc interval interval-value service-instance instance-id

undo cfd cc interval [ interval-value ] service-instance instance-id

Default

The value of this field is 4 for all CCMs sent.

Views

System view

Predefined user roles

network-admin

Parameters

interval interval-value: Specifies the value of the interval field in CCM messages. The value range for the interval field is 1 to 7.

service-instance instance-id: Specifies the service instance ID in the range of 1 to 32767.

Usage guidelines

When setting the CCM interval, use the settings described in Table 1.

Table 1 CCM interval field encoding

CCM interval field	Transmission interval	Maximum CCM lifetime
1	10/3 milliseconds	35/3 milliseconds
2	10 milliseconds	35 milliseconds
3	100 milliseconds	350 milliseconds
4	1 second	3.5 seconds
5	10 seconds	35 seconds
6	60 seconds	210 seconds
7	600 seconds	2100 seconds

Examples

# Set the value of the interval field to 3 in CCMs sent by MEPs in service instance 2.

<Sysname> system-view

[Sysname] cfd cc interval 3 service-instance 2

Related commands

cfd cc enable

cfd dlm continual

Use cfd dlm continual to configure continual two-way loss measurement (LM).

Use undo cfd dlm continual to disable continual two-way LM.

Syntax

cfd dlm continual service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ dot1p dot1p-value ]

Default

Continual two-way LM is disabled.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its bridge MAC address, which is in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

dot1p dot1p-value: Specifies an 802.1p priority for CCM frames. The value range for the dot1p-value argument is 0 to 7. The default value is 7.

Usage guidelines

The two-way LM function measures the frame loss between the source and target MEPs by using CCMs. The source MEP calculates the number of lost frames according to the counter values of two consecutive CCMs received (the current CCM and the previous CCM).

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

For the two-way LM function to take effect, you must configure it on both the local and peer devices.

If the frame counting mode is dot1p-based, you must specify the dot1p dot1p-value option. If the frame counting mode is port-based, do not specify the dot1p dot1p-value option.

To modify two-way LM settings for a source MEP, disable two-way LM and then reconfigure the function for the source MEP.

The two-way LM detection interval is the CCM interval. Before configuring two-way LM, configure the CCM interval field value to be greater than 2.

One-way LM and two-way LM cannot be configured at the same time for one source MEP. If you have configured short-period one-way LM or continual one-way LM, you can configure two-way LM only after you disable continual one-way LM or short-period one-way LM ends. If you have configured two-way LM, you can configure short-period one-way LM or continual one-way LM only after disable two-way LM.

To display the two-way LM result, use the display cfd dlm history command on the device where the source MEP or target MEP resides.

Two-way LM can be configured only in Layer 2 VPNs. MEPs created in a Layer 2 Ethernet service instance do not support two-way LM.

Examples

# Enable the continual two-way LM function to measure the frame loss between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> system-view

[Sysname] cfd dlm continual service-instance 1 mep 1101 target-mep 2001

Related commands

cfd cc interval

cfd slm

cfd slm continual

display cfd dlm history

cfd dlm threshold

Use cfd dlm threshold to configure the lower limit and upper limit for continual two-way LM.

Use undo cfd dlm threshold to restore the default.

Syntax

cfd dlm { far-end | near-end } threshold service-instance instance-id mep mep-id { lower-limit lower-limit | upper-limit upper-limit } *

undo cfd dlm { far-end | near-end } threshold service-instance instance-id mep mep-id [ lower-limit | upper-limit ]

Default

The lower limit and upper limit for continual two-way LM are 0 and 100%, respectively, for both the source and target MEPs.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

far-end: Configures the lower limit and upper limit for the target MEP.

near-end: Configures the lower limit and upper limit for the source MEP.

mep mep-id: Specifies a MEP by its ID in the range of 1 to 8191.

lower-limit lower-limit: Specifies the lower limit in percentage, in the range of 0 to 100. It can contain a maximum of 8 digits, including the dot (.), for example, 1.000001. The lower limit must be smaller than the upper limit.

upper-limit upper-limit: Specifies the upper limit in percentage, in the range of 0 to 100. It can contain a maximum of 8 digits, including the dot (.), for example, 1.000001.

Usage guidelines

This command takes effect only after you configure continual two-way LM.

When the packet loss ratio for the source MEP or target MEP reaches or exceeds the upper limit, the system displays a message about the situation.

When the packet loss ratios for both the source MEP and target MEP reach or fall below the lower limit, the system displays a message about the situation.

Examples

# Configure the lower limit and upper limit as 0.2% and 0.8%, respectively, for source MEP 1101 in service instance 1.

<Sysname> system-view

[Sysname] cfd dlm near-end threshold service-instance 1 mep 1101 lower-limit 0.2 upper-limit 0.8

Related commands

cfd dlm continual

display cfd dlm history

cfd dm one-way

Use cfd dm one-way to enable short-period one-way delay measurement (DM).

NOTE:

This command is supported only in R3608 and later.

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Syntax

cfd dm one-way service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ peer ip-address pw-id pw-id ] [dot1p dot1p-value ] [ number number ] [ interval interval ]

Views

Any view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its MAC address in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

peer ip-address: Specifies a remote PE device by its LSR ID. This option is required only if the target MEP resides on a remote PE device in a VPLS network.

pw-id pw-id: Specifies a PW by its ID in the range of 1 to 4294967295.

dot1p dot1p-value: Specifies an 802.1p priority for 1DM frames. The value range for the dot1p-value argument is 0 to 7. The default value is 7.

number number: Specifies the number of 1DM frames sent. The value range for the number argument is 2 to 10, and the default is 5.

interval interval: Specifies the 1DM frame sending interval, in seconds. The value takes 1, 10, 60, or 600. The default value is 1.

Usage guidelines

The short-period one-way DM function measures the one-way frame delay between the source and target MEPs by using 1DM frames.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

Short-period one-way DM and continual one-way DM cannot be configured at the same time for one source MEP. If you have configured continual one-way DM, you can configure short-period one-way DM only after you disable continual one-way DM. If you have configured short-period one-way DM, you can configure continual one-way DM only after the short-period one-way DM ends.

To view the short-period one-way delay test result, use the display cfd dm one-way history command on the target MEP.

Examples

# Enable the short-period one-way DM function to test the one-way frame delay from source MEP 1101 to target MEP 1003 in service instance 1.

<Sysname> cfd dm one-way service-instance 1 mep 1101 target-mep 1003

5 1DMs have been sent. Please check the result on the remote device.

Related commands

cfd dm one-way continual

display cfd dm one-way history

reset cfd dm one-way history

cfd dm one-way continual

Use cfd dm one-way continual to configure continual one-way DM.

Use undo cfd dm one-way continual to disable continual one-way DM.

NOTE:

This command is supported only in R3608 and later.

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Syntax

cfd dm one-way continual service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ peer ip-address pw-id pw-id ] [dot1p dot1p-value ] [ interval interval ]

undo cfd dm one-way continual service-instance instance-id mep mep-id

Default

Continual one-way DM is disabled.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its MAC address, which is in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

peer ip-address: Specifies a remote PE device by its LSR ID. This option is required only if the target MEP resides on a remote PE device in a VPLS network.

pw-id pw-id: Specifies a PW by its ID in the range of 1 to 4294967295.

dot1p dot1p-value: Specifies the 802.1p priority of 1DM frames to be sent. The value range for the dot1p-value argument is 0 to 7, and the default is 7. The larger the value, the higher the priority.

interval interval: Specifies the interval for sending 1DM frames, in seconds. The value for the interval argument can be 1, 10, 60, or 600, and the default is 1.

Usage guidelines

Continual one-way DM continually sends 1DM frames at a configurable interval. It measures the one-way frame delay between the source and target MEPs after receiving the returned 1DM frames.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

If the device supports hardware CC, you can only specify the target MEP by its MAC address. You cannot specify the target MEP by its ID.

To modify continual one-way DM settings for a source MEP, disable continual one-way DM and then reconfigure the function for the source MEP.

To display the continual one-way DM result, use the display cfd dm one-way history command on the device where the source MEP resides.

Inward-facing MEPs created in an Ethernet network do not support continual one-way DM.

Examples

# Configure continual one-way DM to test the frame delay between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> system-view

[Sysname] cfd dm one-way continual service-instance 1 mep 1101 target-mep 2001

Related commands

cfd dm two-way

display cfd dm one-way history

reset cfd dm one-way history

cfd dm two-way

Use cfd dm two-way to enable short-period two-way DM.

Syntax

cfd dm two-way service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ dot1p dot1p-value ] [ number number ] [ interval interval ]

Views

Any view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its bridge MAC address, which is in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

dot1p dot1p-value: Specifies an 802.1p priority for DMMs. The value range for the dot1p-value argument is 0 to 7. The default value is 7.

number number: Specifies the number of DMM frames to be sent. The value range for the number argument is 2 to 10, and the default is 5.

interval interval: Specifies the DMM frame sending interval, in seconds. The value takes 1, 10, 60, or 600. The default value is 1.

Usage guidelines

The short-period two-way DM function measures the two-way frame delay between the source and target MEPs by using DMM frames and DMR frames.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

Short-period two-way DM and continual two-way DM cannot be configured at the same time for one source MEP. If you have configured continual two-way DM, you can configure short-period two-way DM only after you disable continual two-way DM. If you have configured short-period two-way DM, you can configure continual two-way DM only after the short-period two-way DM ends.

Examples

# Enable the short-period two-way DM function to test the two-way frame delay between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> cfd dm two-way service-instance 1 mep 1101 target-mep 2001

Frame delay:

Reply from 0010-fc00-6512: 10us

Reply from 0010-fc00-6512: 9us

Reply from 0010-fc00-6512: 11us

Reply from 0010-fc00-6512: 5us

Average: 8us

Frame delay variation: 1us 2us 6us 0us

Average: 2us

Packet statistics:

Sent DMMs: 5 Received: 5 Lost: 0

Table 2 Command output

Field	Description
Reply from 0010-fc00-6512	Delay of the DMR frames returned from the MEP with MAC address 0010-FC00-6512.
Average	Average frame delay or average frame delay variation.
Sent DMMs	Number of sent DMM frames .
Received	Number of received DMR frames.
Lost	Number of lost DMM frames.

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Related commands

cfd dm two-way continual

Use cfd dm two-way continual to enable continual two-way DM.

Use undo cfd dm two-way continual to disable continual two-way DM.

Syntax

cfd dm two-way continual service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ dot1p dot1p-value ] [ interval interval ]

undo cfd dm two-way continual service-instance instance-id mep mep-id

Default

Continual two-way DM is disabled.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its bridge MAC address, which is in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

dot1p dot1p-value: Specifies an 802.1p priority for DMM frames. The value range for the dot1p-value argument is 0 to 7. The default value is 7.

interval interval: Specifies the DMM frame sending interval, in seconds. The value takes 1, 10, 60, or 600. The default value is 1.

Usage guidelines

Continual two-way DM continually sends DMM frames at a configurable interval. It measures the two-way frame delay between the source and target MEPs after receiving the returned DMR frames.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

To modify continual two-way DM settings for a source MEP, disable continual two-way DM and then reconfigure the function for the source MEP.

To display the continual two-way DM result, use the display cfd dm two-way history command on the device where the source MEP resides.

Inward-facing MEPs created in an Ethernet network do not support continual two-way DM.

Examples

# Enable the continual two-way DM function to test the two-way frame delay between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> system-view

[Sysname] cfd dm two-way continual service-instance 1 mep 1101 target-mep 2001

Related commands

cfd dm two-way

display cfd dm two-way history

cfd dm two-way threshold

Use cfd dm two-way threshold to configure the lower limit and upper limit for continual two-way DM.

Use undo cfd dm two-way threshold to restore the default.

Syntax

cfd dm two-way threshold service-instance instance-id mep mep-id { lower-limit lower-limit | upper-limit upper-limit } *

undo cfd dm two-way threshold service-instance instance-id mep mep-id [ lower-limit | upper-limit ]

Default

The lower limit and upper limit for continual two-way DM are 0 and 4294967295 microseconds, respectively.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

lower-limit lower-limit: Specifies the lower limit in the range of 0 to 4294967295 microseconds. The lower limit must be smaller than the upper limit.

upper-limit upper-limit: Specifies the upper limit in the range of 0 to 4294967295 microseconds.

Usage guidelines

This command takes effect only after you configure continual two-way DM.

If the delay time reaches or exceeds the upper limit for three consecutive times, the system displays a message about the situation.

If the delay time reaches or falls below the lower limit for three consecutive times, the system displays a message about the situation.

Examples

# Configure the continual two-way DM lower limit and upper limit as 10000 and 5000000 microseconds, respectively, for source MEP 1101 in service instance 1.

<Sysname> system-view

[Sysname] cfd dm two-way threshold service-instance 1 mep 1101 lower-limit 10000 upper-limit 5000000

Related commands

cfd dm two-way continual

display cfd dm two-way history

cfd enable

Use cfd enable to enable CFD.

Use undo cfd enable to disable CFD.

Syntax

cfd enable

undo cfd enable

Default

CFD is disabled.

Views

System view

Predefined user roles

network-admin

Examples

# Enable CFD.

<Sysname> system-view

[Sysname] cfd enable

cfd frame-count mode

Use cfd frame-count mode to configure the frame counting mode for LM.

Use undo frame-count mode to restore the default.

Syntax

cfd frame-count mode { dot1p-based | port-based }

undo cfd frame-count mode

Default

No frame counting mode is configured for LM.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

Layer 2 Ethernet service instance view

Predefined user roles

network-admin

Parameters

dot1p-based: Counts packets by 802.1p priority.

port-based: Counts packets by interface.

Usage guidelines

To obtain accurate test results, configure the same frame counting mode on the source MEP and target MEP.

If the frame counting mode is dot1p-based, you must specify the dot1p dot1p-value option when configuring the cfd slm, cfd slm continual, and cfd dlm continual commands. If the frame counting mode is port-based, do not specify the dot1p dot1p-value option when configuring the cfd slm, cfd slm continual, and cfd dlm continual commands.

If LM has been configured for a MEP, the frame counting mode on the interface where the MEP resides cannot be modified.

This command can be configured only in MPLS Layer 2 VPNs.

Examples

# Configure the frame counting mode for LM as dot1p-based on HundredGigE 1/0/1.1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1.1

[Sysname-HundredGigE1/0/1.1] cfd frame-count mode dot1p-based

Related commands

cfd dlm continual

cfd slm

cfd slm continual

cfd hardware-cc

Use cfd hardware-cc to enable hardware CC.

Use undo cfd hardware-cc to disable hardware CC.

NOTE:

This command is supported only in R3608 and later.

‌

Syntax

cfd hardware-cc service-instance instance-id remote-mep mep-list

undo cfd hardware-cc service-instance instance-id remote-mep mep-list

Default

Hardware CC is disabled.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

Layer 2 Ethernet service instance view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

remote-mep mep-list: Specifies remote MEPs. The mep-list argument specifies a space-separated list of up to 10 MEP items. Each item specifies a MEP ID or a range of MEP IDs in the form of mep-id [ to mep-id ]. The value range for MEP IDs is 1 to 8191.

Usage guidelines

In an Ethernet network, you can enable hardware CC only on Layer 2 and Layer 3 Ethernet interfaces.

In an MPLS Layer 2 VPN, you can enable hardware CC only on Layer 3 Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3 aggregate interface view, Layer 3 aggregate subinterface view, and Layer 2 Ethernet service instances.

Do not modify the value of the interval field in CCM messages after hardware CC is enabled. If you modify the value of the interval field in CCM messages, hardware CC is automatically disabled.

Examples

# Enable hardware CC on GigabitEthernet 1/0/1 to detect remote MEP 5 in service instance 1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] cfd hardware-cc service-instance 1 remote-mep 5

# Enable hardware CC in Layer 2 Ethernet service instance 10 on GigabitEthernet 1/0/1 to detect remote MEP 5 in service instance 1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] service-instance 10

[Sysname-GigabitEthernet1/0/1-srv10] cfd hardware-cc service-instance 1 remote-mep 5

Related commands

cfd cc interval

cfd linktrace

Use cfd linktrace to identify the path between the source MEP and target MP.

Syntax

cfd linktrace service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ ttl ttl-value ] [ hw-only ]

Views

Any view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its bridge MAC address, in the format of H-H-H.

target-map target-mep-id: Specifies the destination MEP by its ID in the range of 1 to 8191.

ttl ttl-value: Specifies the TTL value in the range of 1 to 255. The default value is 64.

hw-only: Sets the hw-only bits of the LTMs sent. If you specify this keyword, the source MEP or the target MIP does not flood LTM messages that have an unknown destination MAC address.

Usage guidelines

This command identifies the path between the source MEP and target MP by using LTMs and LTRs.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

Examples

# Identify the path between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> cfd linktrace service-instance 1 mep 1101 target-mep 2001

Linktrace to MEP 2001 with the sequence number 1101-43361:

MAC address TTL Last MAC Relay action

0010-fc00-6512 63 0010-fc00-6500 Hit

Table 3 Command output

Field	Description
Linktrace to MEP 2001 with the sequence number 1101-43361	Linktrace to target MEP 2001 with the sequence number 1101-43361.
MAC address	Source MAC address in the LTR messages.
TTL	TTL of the LTM when it passes the device.
Last MAC	MAC address of the last-hop device the LTM passes.
Relay action	Indicates whether the forwarding device found the destination MAC address in its MAC address table. When the standard version (IEEE 802.1ag) of CFD is used: · Hit—The current device is the destination device. · FDB—The forwarding device found the destination MAC address. · MPDB—The destination MAC address is not found, or the destination MAC address is found in the MEP or MIP database.

Related commands

cfd linktrace auto-detection

display cfd linktrace-reply

cfd linktrace auto-detection

Use cfd linktrace auto-detection to enable automatic sending of LTMs.

Use undo cfd linktrace auto-detection to disable automatic sending of LTMs.

Syntax

cfd linktrace auto-detection [ size size-value ]

undo cfd linktrace auto-detection

Default

Automatic sending of LTMs is disabled.

Views

System view

Predefined user roles

network-admin

Parameters

size size-value: Specifies the size of the buffer used to store the auto-detection result, in the range of 1 to 100 (in terms of auto-detection times). The default value is 5, which means the buffer stores the results of the recent five auto-detections.

Usage guidelines

This command enables the source MEP to send LTMs when it fails to receive CCMs from the target MEP within 3.5 times the sending interval. The destination of the LTMs is the target MEP, and the TTL field value is 255. Based on the returned LTRs, the fault source can be located on the faulty link.

If you disable automatic LTM sending, the content stored in the buffer will be removed.

The outward-facing MEP on a hardware CC-supported card does not automatically send LTMs.

Examples

# Enable automatic LTM sending, and set the size of the buffer used to store the auto-detection result to 100 (in terms of auto-detection times).

<Sysname> system-view

[Sysname] cfd linktrace auto-detection size 100

Related commands

cfd linktrace

display cfd linktrace-reply auto-detection

cfd loopback

Use cfd loopback to enable loopback (LB).

Syntax

cfd loopback service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ number number ]

Views

Any view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its bridge MAC address, in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

number number: Specifies the number of the sent LBMs packets. The value is in the range of 1 to 10. The default value is 5.

Usage guidelines

The LB function verifies link connectivity between the source MEP and the target MP by using LBMs and LBRs.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

Examples

# Enable LB for the link between MEP 1101 and MEP 2001 in service instance 1 (assume that the link status is normal).

<Sysname> cfd loopback service-instance 1 mep 1101 target-mep 2001

Loopback to MEP 2001 with the sequence number start from 1101-43404:

Reply from 0010-fc00-6512: sequence number=1101-43404 Time=5ms

Reply from 0010-fc00-6512: sequence number=1101-43405 Time=5ms

Reply from 0010-fc00-6512: sequence number=1101-43406 Time=5ms

Reply from 0010-fc00-6512: sequence number=1101-43407 Time=5ms

Reply from 0010-fc00-6512: sequence number=1101-43408 Time=5ms

Sent: 5 Received: 5 Lost: 0

# Enable LB for the link between MEP 1101 and MEP 2001 in service instance 1 (assume that the link status is abnormal).

<Sysname> cfd loopback service-instance 1 mep 1101 target-mep 2001

Loopback to MEP 2001 with the sequence number start from 1101-43404:

Sent: 5 Received: 0 Lost: 5

Table 4 Command output

Field	Description
Loopback to MEP 2001 with the sequence number start from 1101-43404	Sends LBMs to remote MEP 2001 with the sequence number starting with 1101-43404.
Reply from 0010-fc00-6512	Reply from the MP with the MAC address 0010-FC00-6512.
sequence number	Sequence number in the LBR messages.
Time=5ms	The interval between the sending of LBMs and receiving of LBRs is 5 milliseconds.
Sent	Number of sent LBMs.
Received	Number of received LBRs.
Lost	Number of lost LBRs.

cfd md

Use cfd md to create an MD.

Use undo cfd md to delete an MD.

Syntax

cfd md md-name [ index index-value ] level level-value [ md-id { dns dns-name | mac mac-address subnumber | none } ]

undo cfd md md-name

Default

No MDs exist.

Views

System view

Predefined user roles

network-admin

Parameters

md md-name: Specifies the name of an MD, which is a string of 1 to 43 characters that can contain letters, numbers, and special characters such as grave accent (`), tilde (~), exclamation mark (!), at sign (@), number sign (#), dollar sign ($), percent (%), caret (^), ampersand (&), asterisk (*), brackets ({ }, ( ),[ ], < >), hyphen (-), underscore (_), plus (+), equal sign (=), vertical bar (|), colon (:), semicolon (;), quotation mark ('), comma (,), period (.), and slash (/).

index index-value: Specifies an MD index in the range of 1 to 4294967295. If you do not specify this option, the system automatically assigns the smallest index number that is not in use. As a best practice, use the index automatically assigned by the system.

level level-value: Specifies an MD level in the range of 0 to 7.

md-id: Specifies the MD name carried by packets sent by the MEP. If you do not provide this keyword, the MD name is represented by md-name.

dns dns-name: Specifies an MD name in the format of DNS name, where dns-name represents the DNS name.

mac mac-address subnumber: Specifies an MD name containing the MAC address and an integer. The mac-address argument represents the MAC address of the MD, and the subnumber argument is in the range of 0 to 65535.

none: Specifies that no MD name is carried in the packets sent by the MEP.

Usage guidelines

An MD name must be in compliant with the specifications in IEEE802.1ag-2007.

When you create MDs, complicated MD names might cause high system resource usage and reduce the number of MDs that can be created. To avoid this issue, as a best practice, specify the none keyword.

You can create only one MD with a specific level. MD cannot be created if you enter an invalid MD name or an existing MD name or the MD index is in use.

When deleting an MD, you will also delete the configurations related to that MD.

Examples

# Create an MD named test_md1, with its level being 3.

<Sysname> system-view

[Sysname] cfd md test_md1 level 3

# Create an MD named test_md2, and the MD name carried in the packet sent by the MEP comprises the MAC address 1-1-1 and integer 1.

<Sysname> system-view

[Sysname] cfd md test_md2 level 5 md-id mac 1-1-1 1

cfd mep

Use cfd mep to create a MEP.

Use undo cfd mep to delete a MEP.

Syntax

In an Ethernet network:

· Layer 2 Ethernet interface view or Layer 2 aggregate interface view:

cfd mep mep-id service-instance instance-id { inbound | outbound }

undo cfd mep mep-id service-instance instance-id

· Layer 3 Ethernet interface view or Layer 3 Ethernet subinterface view:

cfd mep mep-id service-instance instance-id outbound

undo cfd mep mep-id service-instance instance-id

In a Layer 2 VPN:

· Layer 2 Ethernet service instance view, Layer 3 aggregate interface view, or Layer 3 aggregate subinterface view:

cfd mep mep-id service-instance instance-id inbound

undo cfd mep mep-id service-instance instance-id

· Layer 3 Ethernet interface view:

cfd mep mep-id service-instance instance-id { inbound | outbound }

undo cfd mep mep-id service-instance instance-id

· Layer 3 Ethernet subinterface view:

cfd mep mep-id service-instance instance-id inbound

cfd mep mep-id service-instance instance-id [ vlan vlan-id | service-vid vlan-id customer-vid vlan-id ] outbound

undo cfd mep mep-id service-instance instance-id

Default

No MEPs exist.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Layer 2 aggregate interface view

Layer 3 Ethernet subinterface view

Layer 3 aggregate interface view

Layer 3 aggregate subinterface view

Layer 2 Ethernet service instance view

Predefined user roles

network-admin

Parameters

mep mep-id: Specifies the MEP ID, in the range of 1 to 8191.

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

vlan vlan-id: Specifies a VLAN by its ID in the range of 1 to 4094.

service-vid vlan-id: Specifies an outer VLAN (SVLAN) by its ID in the range of 1 to 4094.

customer-vid vlan-id: Specifies an inner VLAN (CVLAN) by its ID in the range of 1 to 4094.

inbound: Creates an inward-facing MEP.

outbound: Creates an outward-facing MEP.

Usage guidelines

In creating a MEP, the service instance you specified defines the MD and MA to which the MEP belongs.

You cannot create a MEP if the MEP ID is not included in the MEP list of the relevant service instance.

Follow these guidelines when you use the command:

· Configurations in Ethernet interface view or aggregate interface view take effect only on the current interface.

· If the MEP belongs to an MA that does not carry the VLAN attribute, configurations on a member port of an aggregate interface take effect only on the current member port.

· If the MEP belongs to an MA that carries the VLAN attribute, configurations on a member port of an aggregate interface take effect only when the member port leaves the aggregation group.

In an Ethernet network, you can create MEPs only on Layer 2 Ethernet interfaces, Layer 2 aggregate interfaces, Layer 3 Ethernet interfaces, and Layer 3 Ethernet subinterfaces.

In an MPLS Layer 2 VPN:

· For L2VPN networking, you can create MEPs only on Layer 3 Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3 aggregate interfaces, Layer 3 aggregate subinterfaces, and Layer 2 Ethernet service instances.

· For VPLS networking, you can create MEPs only on Layer 3 Ethernet interfaces, Layer 3 Ethernet subinterfaces, Layer 3 aggregate interfaces, and Layer 3 aggregate subinterfaces.

· Only one inward-facing MEP can be configured for a CFD service instance.

· A MEP can only be configured on an AC interface to detect PW connectivity.

To specify the VLAN ID when creating a MEP, you must first configure the vlan-type dot1q vid vlan-id-list command and specify the same value for the vlan-id-list and vlan vlan-id parameters. For more information about the vlan-type dot1q vid vlan-id-list command, see VLAN termination commands in Layer 2—LAN Switching Command Reference.

To specify the outer and inner VLAN IDs when creating a MEP, you must first configure the vlan-type dot1q vid second-dot1q command and set the same outer VLAN ID and the same inner VLAN ID in the two commands. For more information about the vlan-type dot1q vid second-dot1q command, see VLAN termination commands in Layer 2—LAN Switching Command Reference.

Examples

# In an Ethernet network, configure a MEP list in service instance 5, and create inward-facing MEP 3 in service instance 5 on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] cfd md test_md level 3

[Sysname] cfd service-instance 5 ma-id vlan-based md test_md vlan 100

[Sysname] cfd meplist 3 service-instance 5

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] cfd mep 3 service-instance 5 outbound

# In an MPLS Layer 2 VPN, configure a MEP list in service instance 5, and create inward-facing MEP 3 in service instance 5 on HundredGigE 1/0/1.1.

<Sysname> system-view

[Sysname] cfd md vpnmd level 4

[Sysname] cfd service-instance 5 ma-id string vpnma md vpnmd xconnect-group vpn1 connection ac2pw

[Sysname] cfd meplist 3 service-instance 5

[Sysname] interface hundredgige 1/0/1.1

[Sysname-HundredGigE1/0/1.1] cfd mep 3 service-instance 5 inbound

Related commands

cfd meplist

vlan-type dot1q vid (Layer 2—LAN Switching Command Reference)

vlan-type dot1q vid second-dot1q (Layer 2—LAN Switching Command Reference)

cfd meplist

Use cfd meplist to create a MEP list.

Use undo cfd meplist to delete a MEP list.

Syntax

cfd meplist mep-list service-instance instance-id

undo cfd meplist mep-list service-instance instance-id

Default

No MEP list is created.

Views

System view

Predefined user roles

network-admin

Parameters

meplist mep-list: Specifies a space-separated list of up to 10 MEP items. Each item specifies a MEP ID or a range of MEP IDs in the form of mep-id 1 to mep-id 2. The value range for the MEP ID is 1 to 8191. The mep-id 2 must be equal to or greater than mep-id 1.

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

Usage guidelines

A MEP list is a collection of local MEPs allowed to be configured and the remote MEPs to be monitored in the same MA.

Before creating a MEP list, create the relevant MD and service instance.

After you delete a MEP list, all local MEP configurations based on this list are deleted.

Examples

# In an Ethernet network, create a MEP list that includes MEP 9 through MEP 15 in service instance 5.

<Sysname> system-view

[Sysname] cfd md test_md level 3

[Sysname] cfd service-instance 5 ma-id vlan-based md test_md vlan 100

[Sysname] cfd meplist 9 to 15 service-instance 5

# In an MPLS Layer 2 VPN, create a MEP list that includes MEP 9 through MEP 15 in service instance 5.

<Sysname> system-view

[Sysname] cfd md test_md level 3

[Sysname] cfd service-instance 5 ma-id string vpnma md vpnmd xconnect-group vpn1 connection ac2pw

[Sysname] cfd meplist 9 to 15 service-instance 5

Related commands

cfd md

cfd service-instance

cfd mip-rule

Use cfd mip-rule to configure the rules for generating MIPs.

Use undo cfd mip-rule to remove the rules for generating MIPs and the MIPs created in a service instance.

Syntax

cfd mip-rule { default | explicit } service-instance instance-id

undo cfd mip-rule [ default | explicit ] service-instance instance-id

Default

No rules for generating MIPs are configured and the system does not automatically generate any MIPs.

Views

System view

Predefined user roles

network-admin

Parameters

default: Specifies the default rule. If no lower-level MIP exists on an interface, a MIP is created on the current level. A MIP can be created even if no MEP is configured on the interface.

explicit: Specifies the explicit rule. If no lower-level MIP exists and a lower-level MEP exists on an interface, a MIP is created at the current level. A MIP can be created only when a lower-level MEP is created on the interface.

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

Usage guidelines

The system automatically generates MIPs on each interface according to the rules configured.

This command takes effect only in Ethernet networks.

Examples

# Configure the MIP generation rule as default in service instance 5.

<Sysname> system-view

[Sysname] cfd mip-rule default service-instance 5

cfd service-instance

Use cfd service-instance to create a service instance.

Use undo cfd service-instance to remove a service instance.

Syntax

In an Ethernet network:

cfd service-instance instance-id ma-id { icc-based ma-name | integer ma-num | string ma-name | vlan-based [ vlan-id ] } [ ma-index index-value ] md md-name vlan vlan-id

undo cfd service-instance instance-id

In an MPLS Layer 2 VPN:

cfd service-instance instance-id ma-id { icc-based ma-name | integer ma-num | string ma-name } [ ma-index index-value ] md md-name { xconnect-group group-name connection connection-name | vsi vsi-name }

undo cfd service-instance instance-id

Default

No service instances exist.

Views

System view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies the service instance ID in the range of 1 to 32767.

ma-id: Creates an MA.

icc-based ma-name: Specifies that an MA is identified by an ICC. The ma-name argument is a string of 1 to 13 characters. An MA name must be compliant with the specifications in IEEE802.1ag-2007

integer ma-num: Specifies that an MA is identified by an integer, where the ma-num argument is in the range of 0 to 65535.

string ma-name: Specifies that an MA is identified by a string, where the ma-name argument is string of 1 to 45 characters that can contain letters, numbers, and special characters such as grave accent (`), tilde (~), exclamation mark (!), at sign (@), number sign (#), dollar sign ($), percent (%), caret (^), ampersand (&), asterisk (*), brackets ({ }, ( ),[ ], < >), hyphen (-), underscore (_), plus (+), equal sign (=), vertical bar (|), colon (:), semicolon (;), quotation mark ('), comma (,), period (.), and slash (/).

vlan-based [ vlan-id ]: Specifies that an MA is identified by a VLAN ID, where the vlan-id argument is in the range of 1 to 4094. If you do not provide the vlan-id argument, the VLAN ID specified by vlan vlan-id is used. If the vlan vlan-id option is not provided, you must specify the vlan-id argument for the vlan-based [ vlan-id ] option.

ma-index index-value: Specifies an MA index in the range of 1 to 4294967295. If you do not specify this option, the system automatically assigns the smallest index number that is not in use. As a best practice, use the index automatically assigned by the system.

md md-name: Specifies the name of an MD. The md-name argument is a string of 1 to 43 characters that can contain letters, numbers, and special characters such as grave accent (`), tilde (~), exclamation mark (!), at sign (@), number sign (#), dollar sign ($), percent (%), caret (^), ampersand (&), asterisk (*), brackets ({ }, ( ),[ ], < >), hyphen (-), underscore (_), plus (+), equal sign (=), vertical bar (|), colon (:), semicolon (;), quotation mark (’), comma (,), period (.), and slash (/).

vlan vlan-id: Specifies the VLAN that the MA serves. The value range for the vlan-id argument is 1 to 4094.

xconnect-group group-name: Specifies the cross-connect group that the MA serves. The group-name argument is a case-sensitive string of 1 to 31 characters excluding hyphens (-).

connection connection-name: Specifies the cross-connect that the MA serves. The connection-name argument is a case-sensitive string of 1 to 20 characters excluding hyphens (-).

vsi vsi-name: Specifies the VSI that the MA serves. The vsi-name argument is a case-sensitive string of 1 to 31 characters.

Usage guidelines

You must create the relevant MD before creating a service instance.

When you create service instances, complicated MA names might cause high system resource usage and reduce the number of service instances that can be created. To avoid this issue, as a best practice, specify the integer keyword.

Deleting a service instance also deletes the configurations related to that service instance.

Deleting a service instance not only removes the connection between the service instance and the relevant MA, but also deletes the MA.

When you create a service instance in an Ethernet network, follow these restrictions and guidelines:

· A service instance is indicated by an integer to represent an MA in an MD. An MA index uniquely identifies a specific MA in an MD. An MA index can be used in different MDs.

· With the vlan-based [ vlan-id ] or vlan vlan-id option, the command creates an MA carrying the VLAN attribute. If you do not specify the option, the command creates an MA carrying no VLAN attribute.

Examples

# Create a level-3 MD named test_md and create service instance 5, in which the MA is identified by a VLAN and serves VLAN 100.

<Sysname> system-view

[Sysname] cfd md test_md level 3

[Sysname] cfd service-instance 5 ma-id vlan-based md test_md vlan 100

# Create a level-4 MD named vpnmd and create service instance 10, in which the MA is identified by vpnma and serves cross-connect ac2pw in cross-connect group vpn1.

<Sysname> system-view

[Sysname] cfd md vpnmd level 4

[Sysname] cfd service-instance 10 ma-id string vpnma md vpnmd xconnect-group vpn1 connection ac2pw

Related commands

cfd md

cfd slm

Use cfd slm to enable short-period one-way loss measurement.

Syntax

cfd slm service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ peer ip-address pw-id pw-id ] [ dot1p dot1p-value ] [ number number ] [ interval { interval | msec msec-interval } ]

Views

Any view

Predefined user roles

network-admin

Parameters

service-instance instance-id: Specifies a service instance by its ID in the range of 1 to 32767.

mep mep-id: Specifies the source MEP by its ID in the range of 1 to 8191.

target-mac mac-address: Specifies the target MEP by its MAC address, which is in the format of H-H-H.

target-mep target-mep-id: Specifies the target MEP by its ID in the range of 1 to 8191.

peer ip-address: Specifies a remote PE device by its LSR ID. This option is required only if the target MEP resides on a remote PE device in a VPLS network.

pw-id pw-id: Specifies a PW by its ID in the range of 1 to 4294967295.

dot1p dot1p-value: Specifies an 802.1p priority for LMM frames. The value range for the dot1p-value argument is 0 to 7. The default value is 7.

number number: Specifies the number of LMM frames to be sent. The value range for the number argument is 2 to 10, and the default is 5.

interval interval: Specifies the LMM frame sending interval, in seconds. The value takes 1, 10, 60, or 600. The default value is 1.

msec msec-interval: Specifies the LMM frame sending interval, in milliseconds. The value takes 100, 1000, 10000, 60000, or 600000. The default value is 1000.

Usage guidelines

The short-period one-way LM function measures the frame loss between the source and target MEPs by using LMM frames and LMR frames.

To view the bridge MAC address of the target MEP, execute the display lacp system-id command on the target MEP.

Before enabling short-period one-way LM in an MPLS Layer 2 VPN, you must configure the same frame counting mode on the source MEP and target MEP.

If the frame counting mode is dot1p-based, you must specify the dot1p dot1p-value option. If the frame counting mode is port-based, do not specify the dot1p dot1p-value option.

Short-period one-way LM and continual one-way LM cannot be configured at the same time for one source MEP. If you have configured continual one-way LM, you can configure short-period one-way LM only after you disable continual one-way LM. If you have configured short-period one-way LM, you can configure continual one-way LM only after the short-period one-way LM ends.

Short-period one-way LM and continual two-way LM cannot be configured at the same time for one source MEP. If you have configured short-period one-way LM, you can configure continual two-way LM only after the short-period one-way LM ends. If you have configured continual two-way LM, you can configure short-period one-way LM only after you disable continual two-way LM.

Examples

# Enable the short-period one-way LM function to measure the frame loss between source MEP 1101 and target MEP 2001 in service instance 1.

<Sysname> cfd slm service-instance 1 mep 1101 target-mep 2001

Reply from 0010-fc00-6512:

Far-end frame loss : 10 Far-end frame loss rate : 10.00%

Near-end frame loss: 20 Near-end frame loss rate: 20.00%

Reply from 0010-fc00-6512:

Far-end frame loss : 40 Far-end frame loss rate : 40.00%

Near-end frame loss: 40 Near-end frame loss rate: 40.00%

Reply from 0010-fc00-6512:

Far-end frame loss : 0 Far-end frame loss rate : 0.00%

Near-end frame loss: 10 Near-end frame loss rate: 10.00%

Reply from 0010-fc00-6512:

Far-end frame loss : 30 Far-end frame loss rate : 30.00%

Near-end frame loss: 30 Near-end frame loss rate: 30.00%

Reply from 0010-fc00-6512:

Far-end frame loss : 20 Far-end frame loss rate : 20.00%

Near-end frame loss: 25 Near-end frame loss rate: 25.00%

Average

Far-end frame loss : 20 Far-end frame loss rate : 20.00%

Near-end frame loss: 25 Near-end frame loss rate: 25.00%

Packet statistics:

Sent LMMs: 5 Received: 5

Table 5 Command output

Field	Description
Reply from 0010-fc00-6512	LMR frames returned from the target MEP with MAC address 0010-FC00-6512.
Far-end frame loss	Number of lost frames on the target MEP.
Near-end frame loss	Number of lost frames on the source MEP.
Far-end frame loss rate	Frame loss ratio on the target MEP.
Near-end frame loss rate	Frame loss ratio on the source MEP.
Average	Average number of lost frames.
Sent LMMs	Number of sent LMM frames.
Received	Number of received LMR frames.

Related commands

cfd dlm continual

cfd frame-count mode

cfd slm continual

Use cfd slm continual to configure continual one-way LM.

Use undo cfd slm continual to disable continual one-way LM.

Syntax

cfd slm continual service-instance instance-id mep mep-id { target-mac mac-address | target-mep target-mep-id } [ peer ip-address pw-id pw-id ] [ dot1p dot1p-value ] [ interval { interval | msec msec-interval }] [ period period ]

undo cfd slm continual service-instance instance-id mep mep-id

Default

Continual one-way LM is disabled.