display cfd linktrace-reply auto-detection

Use display cfd linktrace-reply auto-detection to display information about the LTR messages received as responses to the automatically sent LTMs.

Syntax

display cfd linktrace-reply auto-detection [ size size-value ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

size size-value: Specifies the times of recent auto-detections, in the range of 1 to 100. If you do not specify this option, all information in the buffer is displayed.

Usage guidelines

This command displays only information about LTRs received by execution of the cfd linktrace auto-detection command.

Examples

# Display the contents of the LTRs received as responses to the LTMs automatically sent.

<Sysname> display cfd linktrace-reply auto-detection
Service instance: 1       MEP ID: 1003    Time: 2014/05/22 10:43:57
Target MEP ID: 2005       TTL: 255
MAC address               TTL     Last MAC          Relay action
0000-fc00-6505            254     0000-fc00-6504    MPDB
000f-e269-a852            62      0000-fc00-6505    FDB
0000-fc00-6508            61      000f-e269-a852    Hit
Service instance: 2       MEP ID: 1023    Time: 2014/05/22 10:44:06
Target MEP ID: 2025       TTL: 255
MAC address               TTL     Last MAC          Relay action
0000-fc00-6508            61      000f-e269-a852    Hit

Table 15: Command output

Field

Description

Service instance

Service instance to which the MEPs that sent LTM messages belong.

MEP ID

ID of the MEP that sends LTMs.

Time

Time of the LTMs automatically sent.

Target MEP ID

ID of the target MEP.

TTL

Initial TTL value of the automatically sent LTMs.

MAC address

Source MAC address in the LTR messages.

TTL

TTL value when LTM 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