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394 CHAPTER 22: FRAME RELAY CONFIGURATION COMMANDS
Use the undo fr lmi n393dte command to restore the default.
By default, the parameter value is 4.
The DTE sends a Status-Enquiry packet at a regular interval to the DCE to inquire
the link status. On receiving this packet, the DCE will immediately send a
Status-Response packet. If the DTE does not receive the response packet in the
specified time, it will record the error by adding 1 to the error count. If the errors
exceed the threshold, the DTE will consider that the physical channels and all the
DLCIs to be unavailable.
N392 and N393 together define the “error threshold”. N393 indicates the event
number observed and N392 indicates the error threshold of that number (N393).
That is, if N392 errors occurred in N393 Status-Enquiry packets in the DTE, the DTE
would consider that the error count had exceeded the threshold and declare the
physical channels and all DLCIs to be unavailable.
N392 at DTE side should be less than N393 at DTE side.
Example # Set the operation of frame relay interface Serial 2/0 as the DTE mode and set
N392 to 5 and N393 to 6.
<Sysname> system-view
[Sysname] interface serial2/0
[Sysname-Serial2/0] link-protocol fr
[Sysname-Serial2/0] fr interface-type dte
[Sysname-Serial2/0] fr lmi n392dte 5
[Sysname-Serial2/0] fr lmi n393dte 6
fr lmi t392dce
Syntax fr lmi t392dce t392-value
undo fr lmi t392dce
View Interface view
Parameter t392-value: Value of T392 at the DCE side. The range of the value is 5 to 30, in
seconds.
Description Use the
fr lmi t392dce command to set T392 parameter at the DCE side.
Use the
undo fr lmi t392dce command to restore the default.
By default, the parameter value is 15 seconds.
This parameter defines the maximum time for DCE waiting for a Status-Enquiry.
T392 at DCE side should be greater than T391 at DTE side Use the timer hold
command to configure the parameter value.