1-5
Field Description
Forwarded
z Yes means that the current device forwards LTMs.
z No means that the current device does not forward LTMs.
Relay Action
Indicates whether the forwarding device found the destination MAC
address in its MAC address table.
When the standard version of IEEE 802.1ag is used:
z Hit: Indicates that the current device is the destination device.
z FDB: Indicates that the forwarding device found the destination MAC
address.
z MPDB: Indicates that the destination MAC address is not found, or
that the destination MAC address is found in the MEP or MIP
database.
When IEEE 802.1ag draft5.2 or the IEEE 802.1ag draft 5.2 interim version
is used:
z Found: Indicates that the forwarding device found the destination
MAC address.
z Unknown: Indicates that the forwarding device failed to find the
destination MAC address.
z None: Indicates that it is a MEP that responded to the LTM message.
A MEP does not need to find the destination MAC address.
cfd linktrace auto-detection
Syntax
cfd linktrace auto-detection [ size size-value ]
undo cfd linktrace auto-detection
View
System view
Default Level
2: System level
Parameters
size size-value: Specifies the size of the buffer used to store the auto-detection result, ranging from 1 to
100 (in terms of sending times).
This value defaults to 5, which means the buffer stores the results of the recent five auto-detections.
Description
Use the cfd linktrace auto-detection command to enable the auto sending of linktrace messages.
Use the undo cfd linktrace auto-detection command to disable this function.
By default, this function is disabled.
Note that:
z After LT messages automatic sending is enabled, if a MEP fails to receive the CCMs from the
remote MEP with 3.5 sending periods, the link between the two is regarded as faulty and LTMs will
be sent out. (The destination of the LTMs is the remote MEP, and the TTL field value is 255.) Based
on the LTRs that echo back, the fault source can be located.
z Once you disable LT messages automatic sending, the content stored in the buffer will be
removed.
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