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S12700 V200R010C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Enabling GMAC Trace to Locate Faults

Enabling GMAC Trace to Locate Faults

Context

Similar to IP traceroute, GMAC trace efficiently detects and locates Ethernet faults and monitors the link quality.

GMAC trace is applicable to the network where no MD, MA, or MEP is configured.

Procedure

  1. Configure the devices on both ends of a link and the intermediate device.

    Perform the following operations on the devices at both ends of the link to be tested and intermediate device.

    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      trace mac enable

      GMAC trace is enabled globally.

      By default, GMAC trace is enabled.

      After GMAC ping is enabled on the device, the device can ping the remote device and respond to received GMAC ping packets.

  2. Perform GMAC trace.

    Perform the following operations on the device at one end of the link to be tested.

    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      trace mac mac-address vlan vlan-id [ interface interface-type interface-number | -t timeout | -h ]*

      The device is configured to locate connectivity faults between the local and remote devices.

      A MEP is not required to initiate GMAC trace. The destination node can be not a MEP or MIP. The destination node can be not a MEP or MIP. That is, GMAC trace can be implemented without configuring the MD, MA, or MEP on the source device, intermediate device, and destination device. All the intermediate devices can respond with an LTR.

      The two devices must be configured with IEEE 802.1ag of the same version otherwise you cannot use the trace mac command. For example, if the local device is configured with IEEE 802.1ag Draft 7 and the remote device is configured with IEEE Standard 802.1ag-2007, the local device cannot ping the remote device.

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Updated: 2019-08-21

Document ID: EDOC1000142081

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