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
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.
Run:
system-view
The system view is displayed.
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.
Perform GMAC trace.
Perform the following operations on the device at one end
of the link to be tested.
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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