3Com 10014299 manual Set/Cancel the default upper layer protocol borne on

206CHAPTER 16: CONFIGURING LAPB AND X.25

Table 244 Configure/Cancel the attributes related to the address code block in the call packet or call accept packet

Operation	Command
Not carrying the called DTE address information when a	x25 ignore
call is originated	called-address (by
Default: carry	default)
Cancel not carrying the called DTE address information	undo x25 ignore
when a call is originated	called-address
Not carrying the calling DTE address information when a	x25 ignore
call is originated	calling-address (by
Default: carry	default)
Cancel not carrying of the calling DTE address	undo x25 ignore
information in a call	calling-address
Not carrying the called DTE address information when	x25 response
the originated call is accepted	called-address
Default: not carry
Cancel not carrying of the called DTE address	undo x25 response
information when the originated call is accepted	called-address (by
	default)
Not carrying the calling DTE address information when	x25 response
the originated call is accepted	calling-address
Default: not carry
Cancel not carrying the calling DTE address information	undo x25 response
when the originated call is accepted	calling-address (by
	default)
Check the address code block after the response of the	x25
call is received	check-response-address
Default: check	(by default)
Cancel check the address code block after the response	undo x25
of the call is received	check-response-address

4Configure default upper layer protocol

X.25 call request packet includes a CUD field (Call User Data), which shows the upper layer protocol type X.25 protocol carries. When receiving X.25 calls, the router will check packet CUD field; when receiving calls carrying the CUD fields that cannot be identified, it will reject them. But an upper layer protocol can be specified as the default protocol borne on the X.25 of the 3Com Router series.

When the X.25 of the 3Com Router series receives a call with an unrecognizable CUD, it will treat it as the default upper layer protocol specified by user.

In the interface view, perform the following task to set/cancel the default upper layer protocol borne on X.25.

Table 245 Set/Cancel the default upper layer protocol borne on X.25

Operation	Command
Specify the default upper layer protocol borne on	x25 default-protocol [ ip
X.25	ipx ]
Default: IP
Cancel the specifying of the default upper layer	undo x25 default-protocol
protocol borne on X.25	[ ip ipx ]

By default, the upper protocol carried by X.25 is IP protocol.