3com 3031 Instruccion De Instalación
Configuring X.25
297
Configuring the attribute related to X.25 address
To establish a SVC with a call, X.25 address is needed, which adopts the address
format specified in ITU-T Recommendation X.121.X.121 address is a string of 0 to
15 digits in length. Some attributes related to X.121 address are configured as
follows:
format specified in ITU-T Recommendation X.121.X.121 address is a string of 0 to
15 digits in length. Some attributes related to X.121 address are configured as
follows:
1 Configure the alias of interface
When an X.25 call is forwarded across multiple networks, different networks will
likely make some modifications on the called address as needed, such as adding or
deleting the prefix. In such cases, the destination address of a call that reaches
X.25 interface may be inconsistent with X.121 address of the destination interface
(because the destination address of this call is modified within the network), still
the interface should accept this call. For this purpose, one or more alias names
must be specified for this interface.
likely make some modifications on the called address as needed, such as adding or
deleting the prefix. In such cases, the destination address of a call that reaches
X.25 interface may be inconsistent with X.121 address of the destination interface
(because the destination address of this call is modified within the network), still
the interface should accept this call. For this purpose, one or more alias names
must be specified for this interface.
Perform the following configuration in Interface View.
To meet the requirements of different networks, X.25 defines nine match types
and their relevant alias string formats for 3Com Series routers, as shown in the
following table.
and their relevant alias string formats for 3Com Series routers, as shown in the
following table.
Restore the default delay of the timer for calling procedure,
which is 200 seconds at DTE side and 180 seconds at DCE side.
which is 200 seconds at DTE side and 180 seconds at DCE side.
undo x25 timer tx1
Set the timer delay value of restore procedure
x25 timer tx2 seconds
Restore the default delay of the timer for reset procedure,
which is 180 seconds at DTE side and 60 seconds at DCE side.
which is 180 seconds at DTE side and 60 seconds at DCE side.
undo x25 timer tx2
Set the timer delay value of clearing procedure
x25 timer tx3 seconds
Restore the default delay of the timer for clearing procedure,
which is 180 seconds at DTE side and 60 seconds at DCE side.
which is 180 seconds at DTE side and 60 seconds at DCE side.
undo x25 timer tx3
Table 357 Setting X.25 layer 3 timer delay
Table 358 Configuring the alias of interface
Operation
Command
Specify an alias for the
interface
interface
x25 alias-policy match-type alias-string
Remove the alias for the
interface
interface
undo x25 alias-policy match-type alias-string
Table 359 Alias match modes and meanings
Matching
mode
mode
Description
Example
free
Free matching, the alias
string is in the form of
1234
string is in the form of
1234
”1234” will match with 561234, 1234567 and
956123478, but will not match with 12354.
956123478, but will not match with 12354.
free-ext
Extended free
matching, in which the
alias string is in the
form of …1234
matching, in which the
alias string is in the
form of …1234
“…1234 ..” will match with 678123459, but will not
match with 68123459, 67812345 and 6781234591.
match with 68123459, 67812345 and 6781234591.
left
Left-most matching
mode, in which the
alias string is in the
form of $1234
mode, in which the
alias string is in the
form of $1234
“$1234” will match with 1234567 and 12346790,
but will not match with 3123478 and 123784.
but will not match with 3123478 and 123784.