3Com MSR 50 Series Configuration Manual page 337

Network diagram
Figure 83 Network diagram for TCP/IP header compression protocol application
S 2/0
16 .16 .16 .1/16
X 121 address:1001
Router A
Configuration procedure
1 Configure RouterA
# Configure the link layer protocol of Serial 2/0 as X.25, and configure the
interface to operate in DTE mode.
<RouterA> system-view
[RouterA] interface serial 2/0
[RouterA-serial2/0] link-protocol x25 dte ietf
# Assign an x121 address for the interface.
[RouterA-serial2/0] x25 x121-address 1001
# Assign an IP address for the interface.
[RouterA-serial2/0] ip address 16.16.16.1 255.255.0.0
# Enable TCP/IP header compression.
[RouterA-serial1/0] x25 map compressedtcp 16.16.16.2 x121-address 10
02
2 Configure Router B
# Configure the link layer protocol of Serial 2/0 as X.25, and configure the
interface to operate in DCE mode.
<RouterB> system-view
[RouterB] interface serial 2/0
[RouterB-serial2/0] link-protocol x25 dce ietf
# Assign an X.121 address for the interface.
[RouterB-serial2/0] x25 x121-address 1002
# Assign an IP address for the interface.
[RouterB-serial2/0] ip address 16.16.16.2 255.255.0.0
# Enable TCP/IP header compression.
[RouterB-serial2/0] x25 map compressedtcp 16.16.16.1 x121-address 1001
X.25 Configuration Examples
S2/0
16.16.16.2/16
X121 address:1002
Router B
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