434CHAPTER 26: LAPB AND X.25 CONFIGURATION COMMANDS

lapb modulo

Syntax lapb modulo { 8 128 }

undo lapb modulo

View Interface view

Parameter 8: Modulo 8.

128: Modulo 128.

Description Use the lapb modulo command to specify the LAPB modulo.

Use the undo lapb modulo command to restore the default.

The default is modulo 8.

There are two LAPB frame numbering modes: modulo 8 and modulo 128. Each frame (I frame) is numbered in sequence, in the range 0 to the modulo minus 1. Sequence numbers will cycle within the range.

Modulo 8 is the basic mode. It is sufficient for most links.

Related command: lapb window-size.

Example # Set the LAPB frame numbering mode on Serial2/0 to modulo 8.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] lapb modulo 8

lapb retry

Syntax lapb retry n2-value

undo lapb retry

View Interface view

Parameter n2-value: Value of LAPB N2, indicating the maximum retries that a DCE or DTE sends one frame to DTE or DCE. The value ranges from 1 to 255.

Description Use the lapb retry command to configure LAPB parameter N2.

Use the undo lapb retry command to restore the default.

The default is 10.

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3Com MSR 30, MSR 50 manual Lapb modulo, Lapb retry, Parameter 8 Modulo, Related command lapb window-size