3Com 3C13612, Command Reference Manual

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3Com Router Command Reference Guide — V1.00
require that it should not carry the address field of the calling DTE, some require that
neither of the above address fields should be carried, whereas some require that both
of them should be carried. To meet various requirements, the X. 25 of the 3Com series
routers offers this function. You can consult the ISP about these requirements before
deciding if this function is to be enabled or not.
For related commands, see x25 response called-address , x25 response
calling-address .
Example
# Disable this function for the X.25 interface Serial0.
[3Com-Serial0] undo x25 check-response-address
5.1.23 x25 default-protocol
Syntax
x25 default-protocol protocol-type
undo x25 default-protocol
View
Interface view
Parameter
protocol-type : protocol type which is either IP or IPX.
Description
Using the x25 default-protocol command, you can configure the default upper layer
protocol carried by the X.25 protocol for the interface. Using the undo x25
default-protocol command, you can cancel the protocol specified.
In the process of establishing an X.25 SVC, the called device will check the Call User
Data (CUD) field in the X.25 call request packet. If the field is unidentifiable, it will refuse
to establish the connection for the call. However, the user can specify a default upper
layer protocol borne by X.25. Thus, whenever receiving a call carrying unknown CUD,
X.25 can treat it according to the user-defined default upper layer protocol.
By default, the protocol type is IP.
For related commands, see x25 map .
Example
# Set the default upper-layer protocol over the X.25 interface Serial0 to IP.
[3Com-Serial0] x25 default-protocol ip
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