3Com MSR 50 Series Configuration Manual page 295

To do...
Enter interface view
Specify maximum idle time for
all the SVCs on the interface
Specify maximum idle time for
SVC associated with an
address mapping
Specify the maximum number of SVCs allowed to associate with the same
address mapping
You can specify the maximum number of SVCs allowed to set up for the same
address mapping. Be default, an X.25 address mapping can only be associated
with one VC. In case of busy traffic and slow line speed, you can increase this
number properly to reduce data loss. Up to 8 SVCs can be associated to an X.25
address mapping.
To configure the task, use the following commands:
To do...
Enter system view
Enter interface view
Specify the maximum number of
SVCs associated with all address
mappings on the X.25 interface
Specify the maximum number of
SVCs associated with an address
mapping
Configure packet pre-acknowledgement
According to X.25 protocol, only after the input-window becomes full (i.e. the
number of received packets is equal to the value of window-size
input-window-size) will the receiving end send an acknowledgement. However, in
some X.25 networks, the delays may be long, resulting in low efficiency of sending
and receiving. X.25 allows you to specify an input-window size. Each time the
number of received packets reaches the value, the router will send an
acknowledgment to the peer, thus to improve the receiving and sending efficiency.
The value is called "receive-threshold", which ranges from 0 to
input-window-size. If it is set to 1, every packet will be acknowledged. If it is set to
input-window-size, the acknowledgment will be sent only after the receiving
window is full. In applications requiring a high response speed, this function is
especially important.
To configure packet pre-acknowledgement, use the following commands:
Use the command...
interface interface-type
interface-number
x25 timer idle minutes
x25 map protocol-type
protocol-address
x121-address x.121-address
idle-timer minutes
Use the command...
system-view
interface interface-type
interface-number
x25 vc-per-map count
x25 map protocol-type
protocol-address x121-address
x.121-address vc-per-map count
Configuring X.25 295
Remarks
-
Optional
Defaults to 0 minute, no SVC
cleared automatically in this
case.
Optional
No mapping created by
default, if created, the value
defaults to 0 minute, no SVC
cleared automatically in this
case.
Remarks
-
-
Optional
The count
defaults to 1