3Com Router 3031, Command Reference Manual

Page: 367 / 838

LAPB and X.25 Configuration Commands 367
x25 alias-policy
Syntax
x25 alias-policy match-type alias-string
undo x25 alias-policy match-type alias-string
View
Interface view
Parameter
match-type: Match type of the alias. There are 9 optional match types:
■
free: Free match
■
free-ext: Extended free match
■
left: Left alignment match
■
left-ext: Extended left alignment match
■
right: Right alignment match
■
right-ext: Extended right alignment match
■
strict: Strict match
■
whole: Whole match
■
whole-ext: Extended whole match
alias-string: String of the alias
Description
Using the x25 alias-policy command, you can configure the alias of an X.121
address. Using the undo x25 alias-policy command, you can delete the alias of an
X.121 address.
By default, no x.25 alias is configured.
When an X.25 call is forwarded between networks, different X.25 networks may
perform some operations on the destination addresses (that is, the called DTE
address) carried by this call packet, for example, regularly adding or deleting the
prefix and suffix. In this case, a user needs to set an interface alias for the router to
adapt this change. Please consult your ISP to learn if the network supports this
function before deciding whether the alias function is enabled or not.
For the details about the X.25 alias matching method, please see the chapter LAPB
and X.25 Configurations in Operation Manual.
For the related commands, see display x25 alias-policy and x25 x121-address.
Example
Configure the link-layer protocol on interface Serial0/0/0 as X.25 and its X.121
address to 20112451, and set two aliases with different match types for it.
[3Com] interface serial 0/0/0