3Com MSR 50, MSR 30 manual Link-protocol sdlc, Syntax link-protocol sdlc, 351

351

idle-mark

Syntax idle-mark

undo idle-mark

View Synchronous serial interface view

Parameter None

Description Use the idle-markcommand to configure the idle-time encoding scheme of the synchronous serial interface to be 0xFF.

Use the undo idle-markcommand to restore the default setting.

By default, the synchronous serial interface uses “0x7E” to indicate its idle state.

While most SDLC devices use “0x7E” (flags) to indicate “idle” space between frames, some other SDLC devices use “0xFF” (marks) for this indication. For compatibility with different types of devices, you can configure the router to send either flags (default) or marks to indicate its idle state. When the synchronous serial interface is connected with an AS/400 device, you need to change the idle-time encoding scheme by using this command to improve the speed of polling the AS/400 device.

Example # Configure synchronous serial interface Serial 2/0 to send 0xFF to indicate idle space between frames.

<Sysname> system-view

[Sysname] interface serial 2/0

[Sysname-Serial2/0] idle-mark

link-protocol sdlc

Syntax link-protocol sdlc

View Synchronous serial interface view

Parameter None

Description Use the link-protocol sdlc command to configure the synchronous serial interface to use SDLC as link layer encapsulation protocol.

By default, the default link layer protocol is PPP.

For SNA, SDLC is a link layer protocol, working very similarly as HDLC. To ensure that DLSw works normally, you need to enable SDLC as the link layer encapsulation protocol on the synchronous serial interface.