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206 CHAPTER 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
4 Configure 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
By default, the upper protocol carried by X.25 is IP protocol.
Operation Command
Not carrying the called DTE address information when a
call is originated
Default: carry
x25 ignore
called-address (by
default)
Cancel not carrying the called DTE address information
when a call is originated
undo x25 ignore
called-address
Not carrying the calling DTE address information when a
call is originated
Default: carry
x25 ignore
calling-address (by
default)
Cancel not carrying of the calling DTE address
information in a call
undo x25 ignore
calling-address
Not carrying the called DTE address information when
the originated call is accepted
Default: not carry
x25 response
called-address
Cancel not carrying of the called DTE address
information when the originated call is accepted
undo x25 response
called-address (by
default)
Not carrying the calling DTE address information when
the originated call is accepted
Default: not carry
x25 response
calling-address
Cancel not carrying the calling DTE address information
when the originated call is accepted
undo x25 response
calling-address (by
default)
Check the address code block after the response of the
call is received
Default: check
x25
check-response-address
(by default)
Cancel check the address code block after the response
of the call is received
undo x25
check-response-address
Operation Command
Specify the default upper layer protocol borne on
X.25
Default: IP
x25 default-protocol [ ip
| ipx ]
Cancel the specifying of the default upper layer
protocol borne on X.25
undo x25 default-protocol
[ ip | ipx ]