Supported Platforms
show route aspath-regex
Syntax
Syntax (EX Series Switches)
Release Information
Command introduced before Junos OS Release 7.4.
Command introduced in Junos OS Release 9.0 for EX Series switches.
Description
Display the entries in the routing table that match the specified autonomous system (AS) path regular expression.
Options
regular-expression | — | Regular expression that matches an entire AS path. |
logical-system (all | logical-system-name) | — | (Optional) Perform this operation on all logical systems or on a particular logical system. |
Additional Information
You can specify a regular expression as:
- An individual AS number
- A period wildcard used in place of an AS number
- An AS path regular expression that is enclosed in parentheses
You also can include the operators described in the table of AS path regular expression operators in the Junos Policy Framework Configuration Guide. The following list summarizes these operators:
- {m,n}—At least m and at most n repetitions of the AS path term.
- {m}—Exactly m repetitions of the AS path term.
- {m,}—m or more repetitions of the AS path term.
- *—Zero or more repetitions of an AS path term.
- +—One or more repetitions of an AS path term.
- ?—Zero or one repetition of an AS path term.
- aspath_term | aspath_term—Match one of the
two AS path terms.
When you specify more than one AS number or path term, or when you include an operator in the regular expression, enclose the entire regular expression in quotation marks. For example, to match any path that contains AS number 234, specify the following command:
show route aspath-regex ".* 234 .*"
Required Privilege Level
view
List of Sample Output
show route aspath-regex (Matching a Specific AS Number)show route aspath-regex (Matching Any Path with Two AS Numbers)
Output Fields
For information about output fields, see the output field table for the show route command.
Sample Output
show route aspath-regex (Matching a Specific AS Number)
user@host> show route aspath-regex 65477 inet.0: 46411 destinations, 46411 routes (46409 active, 0 holddown, 2 hidden)
+ = Active Route, - = Last Active, * = Both
111.222.1.0/25 *[BGP/170] 00:08:48, localpref 100, from 111.222.2.24
AS Path: [65477] ({65488 65535}) IGP
to 111.222.18.225 via fpa0.0(111.222.18.233)
111.222.1.128/25 *[IS-IS/15] 09:15:37, metric 37, tag 1
to 111.222.18.225 via fpa0.0(111.222.18.233)
[BGP/170] 00:08:48, localpref 100, from 111.222.2.24
AS Path: [65477] ({65488 65535}) IGP
to 111.222.18.225 via fpa0.0(111.222.18.233)
...
show route aspath-regex (Matching Any Path with Two AS Numbers)
user@host> show route aspath-regex ?.* 234 3561
.*?
inet.0: 46351 destinations, 46351 routes (46349 active, 0 holddown, 2 hidden)
+ = Active Route, - = Last Active, * = Both
9.20.0.0/17 *[BGP/170] 01:35:00, localpref 100, from 131.103.20.49
AS Path: [666] 234 3561 2685 2686 Incomplete
to 192.156.169.1 via 192.156.169.14(so-0/0/0)
12.10.231.0/24 *[BGP/170] 01:35:00, localpref 100, from 131.103.20.49
AS Path: [666] 234 3561 5696 7369 IGP
to 192.156.169.1 via 192.156.169.14(so-0/0/0)
24.64.32.0/19 *[BGP/170] 01:34:59, localpref 100, from 131.103.20.49
AS Path: [666] 234 3561 6327 IGP
to 192.156.169.1 via 192.156.169.14(so-0/0/0)
...
