3Com 10014299 manual Undo fr lmi n393dce, Fr lmi t391dte t391-value, Undo fr lmi t391dte

	Configure Frame Relay 249
Restore the default value of the LMI event	undo fr lmi n393dce
counter
Set the link integrity polling timer at the user side	fr lmi t391dte [ t391-value]
(T391 DTE)
Restore the default value of the link integrity	undo fr lmi t391dte
polling timer at the user side
Set the polling timer at the network side (T392	fr lmi t392dce [ t392-value]
DCE)
Restore the default value of the polling timer at	undo fr lmi t392dce
the network side

The following table describes the value ranges and default values of related parameters of the Frame Relay LMI protocol

Table 278 Descriptions of related parameters of Frame Relay LMI protocol

Operation
mode	Parameter description	Value range	Default value
DTE	Link integrity polling timer (T391)	5 to 30 seconds	10 seconds
	When T391 = 0, it indicates that the
	LMI protocol is disabled.
	Counter on the PVC full status	1 to 255 times	6 times
	message polling requests (N391)
	Error threshold counter at the user	1 to 10 times	3 times
	side (N392)
	Event counter at the user side (N393)	1 to 10 times	4 times
DCE	Polling authentication timer at the	5 to 30 seconds	15 seconds
	network side (T392)
	Error threshold counter at the	1 to 10 times	3 times
	network side (N392)
	Event counter at the network side	1 to 10 times	4 times
	(N393)

In which, the related parameters at the DTE side include:

■T391DTE: The interval of the link integrity polling for the equipment at the DTE side

■N391DTE: DTE equipment will send a status enquiry message at a certain interval (which is determined by T391). The status enquiry messages are divided into two types: link integrity authentication messages and link status enquiry messages. The parameter N391DTE is used to define the sending ratio of these two types of messages. That is:

Number of link integrity authentication messages: Number of link status enquiry

messages = N391-1: 1

■N392DTE: The threshold for the errors that can occur in the total number of observed events at the DTE side.

■N393DTE: The total number of observed events at the DTE side.

DTE equipment will send a status enquiry message at a certain interval (which is determined by T391) to inquire the link status. Upon receiving that message, the DCE equipment sends the status response message promptly. If the DTE equipment does not receive the response in the specified time, the error will be recorded. If the number of errors exceeds the threshold, the DTE equipment will regard the physical path and all the virtual circuits as unusable. The parameters N392 and N393 together define the “error threshold”. That is, if the number of errors in the N393 status enquiry messages sent by the DTE equipment reaches