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The SDLC maximum frame length refers to the bytes of the largest packet that can
be received and sent, excluding the parity bit and the start/stop bit.
The maximum receivable frame length of some PU2.0 devices is of 265 bytes, and
that of IBM AS/400 is generally of 521 bytes. Usually we need to configure it the
same value as the connected SDLC device.
Example
Configure the maximum receivable frame length of the SDLC as 512.
[3Com-Serial1/0/0] sdlc max-pdu 521
sdlc max-send-queue
Syntax
sdlc max-send-queue length
undo sdlc max-send-queue
View
Synchronous serial interface view
Parameter
■
length: The queue length sending the SDLC packet, ranging from 20 to 255.
Description
Using the sdlc max-send-queue command, you can configure the queue length
sending the SDLC packet. Using the undo sdlc max-send-queue command, you
can restore the default value of the queue length sending the SDLC packet.
By default, the queue length sending the SDLC packet is 50.
Example
Configure the queue length sending the SDLC packet on the Serial1/0/0 as 30.
[3Com-Serial1/0/0] sdlc max-send-queue 30
sdlc max-transmission Syntax
sdlc max-transmission retries
undo sdlc max-transmission
View
Synchronous serial interface view
Parameter
■
retries: The SDLC timeout retransmission times, ranging from 1 to 255 times.
Description
Using the sdlc max-transmission command, you can configure the SDLC timeout
retransmission times. Using the undo sdlc max-transmission command, you can
restore the default value of the SDLC timeout retransmission times.
By default, the SDLC timeout retransmission times are 20.
The SDLC timeout retransmission times (N2) refers to the retransmission times
before receiving the acknowledgement packet from the peer end.