Command Reference Guide

336 ● x25 pvc 3Com Router 5000 Family and Router 6000 Family
Command Reference
Before establishing PVCs, users should first enable the PVC channel section. The
section is between 1 and the latest unprohibited channel section PVC number minus
1 (including 1 and the lowest PVC number minus 1). Naturally, if the lowest PVC
number is 1, the PVC section will be disabled naturally. The following table shows
some typical PVC sections.
Detailed explanations of PVC options are follows:
broadcast: Forward broadcast packet to the peer PVC.
encapsulation-type: Encapsulation type, which may be nonstandard, ietf,
multi-protocol and snap.
packet-size input-packet output-packet: Specifies the maximum receiving
packet length and maximum sending packet length. The length is counted in byte,
which must range from 16 to 4096 (including 16 and 4096), and must be the integer
power of 2.
window-size input-window-size output-window-size: Specifies the
receiving window and transmitting window sizes of the VC, which range between 1
and the number that is 1 less than the modulus of the X.25 interface where the
address mapping exists (including 1 and modulus minus 1).
Related Commands ■ display x25
■ x25 map
Table 1 PVC channel section of some typical configurations
Incoming-only channel
range
Two-way channel
range
Outgoing-only channel
range
PVC channel
range
[0, 0] [1, 1024] [0, 0] Disabled
[0, 0] [10, 24] [0, 0] [1, 9]
[1, 10] [15, 30] [0, 0] Disabled
[5, 10] [15, 25] [30, 32] [1, 4]
[0, 0] [0, 0] [20, 45] [1, 19]
[0, 0] [0, 0] [0, 0] [1, 4094]