Configuring X.25 Subinterface; Configuring X.25 Switching - 3Com MSR 50 Series Configuration Manual

Configuring X.25 X.25 subinterface is a virtual interface that has its protocol address and VC. On a
Subinterface physical interface, you can create multiple subinterfaces to implement the
interconnections of multiple networks through a physical interface. All
subinterfaces under master interface share an X.121 address with the master
interface. X.25 subinterfaces fit into point-to-point subinterfaces and
point-to-multipoint subinterfaces. Point-point subinterface is used to connect a
single remote end, while point-to-multipoint subinterface is used to connect
multiple ones, which must be on the same network segment.
To configure an X.25 subinterface, use the following commands:
To do...
Enter system view
Enter interface view
Enable X.25 protocol on the
interface
Create an X.25 subinterface
n
When the link layer protocol of the interface is LAPB, HDLC, or PPP, no
subinterface can be created.
Configuring X.25 X.25 switching function
Switching
A packet network consists of many interconnecting nodes based on a specific
topology. A packet is sent from source to destination via a large number of nodes,
of which each node needs to have packet switching capability.
Simply speaking, X.25 packet switching means that, after receiving a packet from
an X.25 port or Annex G DLCI, a switch will select a certain X.25 port or Annex G
DLCI to send the packet according to the related destination information
contained in the packet. Introducing X.25 switching enables the system to
implement packet switching function at packet layer. The device can act as a
packet switch.
Figure 62 Network diagram for X.25 switching
Host A
Configuration procedure
To configure X.25 switching, use the following commands:
To do...
Enter system view
Use the command...
system-view
interface serial interface-number
link-protocol x25
interface serial
interface-number.subnumber [ p2mp
| p2p ]
Host B
Use the command...
system-view
Configuring X.25 299
Remarks
-
-
Required
Required
P2MP by default
Remarks
-