570
Predefined user roles
network-admin
Parameters
value
: Specifies a tag in the range of 0 to 4294967295.
Examples
# Configure node 10 in
permit
mode for routing policy
policy1
to match IGP routes having a tag of 8.
<Sysname> system-view
[Sysname] route-policy policy1 permit node 10
[Sysname-route-policy-policy1-10] if-match tag 8
ip as-path
Use
ip as-path
to create an AS path list.
Use
undo ip as-path
to remove an AS path list.
Syntax
ip as-path
as-path-number
{
deny
|
permit
}
regular-expression
undo ip as-path
as-path-number
[
regular-expression
|
deny
|
permit
]
Default
No AS path list is created.
Views
System view
Predefined user roles
network-admin
Parameters
as-path-number
: Specifies a number for the AS path list, in the range of 1 to 256.
deny
: Specifies the match mode for the AS path list as
deny
.
permit
: Specifies the match mode for the AS path list as
permit
.
regular-expression
: Specifies an AS path regular expression, a string of 1 to 63 characters.
Usage guidelines
BGP routing updates contain an AS_PATH attribute field that identifies the ASs through which the routes
have passed. An AS path regular expression, for example, ^200. *100$, matches the AS_PATH
attribute that starts with AS 200 and ends with AS 100. For the meanings of special characters used in
regular expressions, see
Fundamentals Configuration Guide
.
Examples
# Create AS path list 1 to permit routes whose AS_PATH attribute starts with 10.
<Sysname> system-view
[Sysname] ip as-path 1 permit ^10
Related commands
•
apply as-path
