3Com 3031 Command Reference Manual page 379

LAPB and X.25 Configuration Commands 379
Parameter
queue-length: Length of queue in packets, which ranges from 0 to 9999.By
default, the data queue length on X.25 VC is 500.
Description
Using the x25 queue-length command, you can set the data queue length on X.25
VC. Using the undo x25 queue-length command, you can restore its default value.
When the data traffic is too heavy, you can use this command to extend the
receiving queue and sending queue of the X.25 VC to avoid data loss that may
affect transmission performance. It should be noted here that modifying this
parameter would not affect the existing data queue of VC.
For the related command, see x25 packet-size
Example
Set the VC data queue length of the X.25 interface Serial0/0/0 to 75 datagrams.
[3Com-Serial0/0/0] x25 queue-length 75
x25 receive-threshold Syntax
x25 receive-threshold count
undo x25 receive-threshold
View
Interface view
Parameter
count: The number of data packets that can be received before previous
acknowledgement, ranging from 0 to input window size. If it is set to 0 or the
input window size, this function will be disabled. If it is set to 1, X.25 of the 3Com
serial routers will send an acknowledgement for each correct packet received. By
default, the number of data packets that can be received on X.25 before previous
acknowledgement is 0.
Description
Using the x25 receive-threshold command, you can set the number of receivable
maximum packets before X.25 sends the acknowledged packet. Using the undo
x25 receive-threshold command, you can restore its default value.
After enabling this function, the 3Com series routers can send acknowledgement
to the peer router upon the receipt of some correct packets, even if the input
window is not yet full. If there is not much data traffic in users' application
environment and users pay more attention to the response speed, they can
appropriately adjust this parameter to meet the requirement.
For the related command, see x25 window.