R2511-HP MSR Router Series Layer 2 - WAN Command Reference(V5)

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either flags (default) or marks. When the synchronous serial interface is connected with an AS/400
device, you must change the idle character by using this command to improve the speed of polling the
AS/400 device.
Examples
# 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
Use link-protocol sdlc to enable SDLC encapsulation on the synchronous serial interface.
Syntax
link-protocol sdlc
Default
The default link layer protocol is PPP.
Views
Synchronous serial interface view
Default command level
2: System level
Usage guidelines
SDLC is a link layer protocol for SNA, and SDLC works very similarly as HDLC. For DLSw to work correctly,
you must enable SDLC encapsulation on the synchronous serial interface.
You must remove all IP related configurations on the interface before enabling SDLC, because SDLC
cannot underlie the IP protocol. For example, you must delete the IP address of the interface.
Examples
# Configure Serial 2/0 to use SDLC as the link layer encapsulation protocol.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] link-protocol sdlc
llc2 max-ack
Use llc2 max-ack to configure the maximum number of information frames the device can receive before
it sends an acknowledgment to the peer router.
Use undo llc2 max-ack to restore the default.
Syntax
llc2 max-ack length
undo llc2 max-ack
Default
The number is 3.