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Configure X.25 209
Table 248 Specify/Cancel SVC maximum idle time
By default, the value of SVC maximum idle time is 0 minute, which means this
SVC will not be disconnected for idle times out.
2 Configure the maximum number of SVCs that are associated with the same
address mapping
The maximum number of virtual circuits to be set up on the same address
mapping can be specified. The X.25 of the 3Com Router series can establish up to
8 virtual circuits on one address mapping. In case of large traffic and low line rate,
this parameter can be increased properly to reduce data loss. By default, one
address mapping is associated with only one virtual circuit.
In the interface view, perform the following commands.
Table 249 Specify/Cancel the maximum number of SVCs associated with the same
address mapping
By default, the value of nvc is 1.
3 Configure the pre-acknowledgment of packets
According to X.25 protocol, the receiving party will send an acknowledgment only
after the receiving window is full (the number of received packets equals the
window-size in-packets value). However, in some X.25 networks, the delays may
be long, resulting in low efficiency of sending and receiving. Therefore, we specify
a value. Each time the number of received packets reaches the value, the
acknowledgment will be sent to the peer, thus improving receiving and sending
efficiency. This value, called a "receive-threshold", ranges between 0 and
window-size in-packets. If it is set to 1, every packet will be acknowledged. If it is
set to window-size in-packets, the acknowledgment will be sent only after the
receiving window is full. In applications requiring a high response speed, this
function is especially important.
In the interface view, perform the following task.
Operation Command
Specify maximum idle time for all the SVCs on an
interface
x25 timer idle minutes
Specify maximum idle time for SVC associated
with an address mapping
x25 map protocol
protocol-address
x121-address x.121-address
timer idle minutes
Cancel specify maximum idle time for all the SVCs
on an interface
undo x25 timer idle
Operation Command
Specify the maximum number of SVCs
associated with all address mappings on an
X.25 interface
x25 vc-per-map count
Specify the maximum number of SVCs
associated with an address mapping
x25 map protocol
protocol-address
x121-address x.121-address
vc-per-map count
Cancel the maximum number of SVCs
associated with all address mappings on an
X.25 interface
undo x25 vc-per-map