352 CHAPTER 21: B ASIC DLSW CONFIGURATION COMMANDSNote that you need to remove all IP related configurations on the interface beforeenabling SDLC, because SDLC cannot underlie the IP protocol. For example, youneed to delete the IP address of the interface.Example # Configure Serial 2/0 to use SDLC as the link layer encapsulation protocol. system-view[Sysname] interface serial 2/0[Sysname-Serial2/0] link-protocol sdlcllc2 max-ackSyntax llc2 max-ack lengthundo llc2 max-ackView Ethernet interface viewParameter length: The maximum number of information frames the router can receive beforeit must send an acknowledgment, in the range of 1 to 127.Description Use the llc2 max-ack command to configure namely the maximum number ofinformation frames the device can receive before it must send anacknowledgment to the peer router.Use the undo llc2 max-ack command to restore the default setting.By default, the maximum number of information frames the router can receivebefore it must send an acknowledgment is 3.Example # Set the maximum number of information frames the router can receive before itmust send an acknowledgment to 5 on Ethernet 1/0. system-view[Sysname] interface ethernet 1/0[Sysname-Ethernet1/0] llc2 max-ack 5llc2 max-pduSyntax llc2 max-pdu lengthundo llc2 max-pduView Ethernet interface viewParameter length: Maximum LLC2 PDU size in bytes, in the range of 1 to 1,700.Description Use the max-pdu command to configure the maximum LLC2 PDU size.
