3Com MSR 30, MSR 50 manual Fr lmi t392dce, Syntax fr lmi t392dce t392-value Undo fr lmi t392dce

394CHAPTER 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.