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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R011C10

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 Ping to Detect Layer 2 Network Connectivity

Enabling GMAC Ping to Detect Layer 2 Network Connectivity


Similar to IP ping, GMAC ping detects whether a fault occurs on an Ethernet link or monitors the link quality. GMAC ping efficiently detects and locates Ethernet faults.

GMAC ping is applicable to networks where no MD, MA, or MEP is configured.


  1. Run the system-view command to enter the system view.
  2. Run the ping mac enable command to enable GMAC ping globally.

    By default, GMAC ping is disabled.

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

  3. Run the ping mac mac-address vlan vlan-id [ interface interface-type interface-number | -c count | -s packetsize | -t timeout | -p priority-value ] * command to perform GMAC ping to check connectivity of the link between the local and remote devices.

    A MEP is not required to initiate GMAC ping. The destination node cannot be a MEP or MIP. You can perform GMAC ping without configuring the MD, MA, or MEP on the source device, intermediate device, and destination device.

    The two devices must be configured with IEEE 802.1ag of the same version. 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 ping mac command does not take effect. That is, the local device cannot ping the remote device.

Updated: 2019-10-18

Document ID: EDOC1000178310

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