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

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Usage guidelines
When the data traffic is too heavy, you can use this command to extend the receiving queue and sending
queue of X.25 virtual circuits to avoid data loss that affects transmission performance. Modifying this
parameter would not affect the existing data queue of virtual circuits. After changing the parameter, you
must restart the port with the shutdown command and then the undo shutdown command and this will
clear the current SVCs and reset the PVCs, and change the data queue of all the VCs.
Examples
# Set the queue length for virtual circuits on X.25 interface Serial 2/0 to 75 packets.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] x25 queue-length 75
x25 receive-threshold
Use x25 receive-threshold to set the maximum number of packets that can be received before X.25 sends
an acknowledgement packet.
Use undo x25 receive-threshold to restore the default.
Syntax
x25 receive-threshold count
undo x25 receive-threshold
Default
The value is 0, and the acknowledgement threshold is disabled.
Views
Interface view
Default command level
2: System level
Parameters
count: Number of packets that can be received before the interface sends an acknowledgement, in the
range 0 to input window size. If it is set to 0 or the input window size, the acknowledgement threshold
function is disabled. If it is set to 1, X.25 of the device will send an acknowledgement for each correctly
received packet.
Usage guidelines
With the acknowledgement threshold function enabled, the device can send an acknowledgement to the
peer on the receipt of some correct packets, even if the input window is not yet full. If data traffic is not
large, and then you can appropriately adjust this parameter to improve the response speed.
Examples
# Specify that each virtual circuit on the X.25 interface Serial 2/0 acknowledges each correctly received
data packet.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] x25 receive-threshold 1