Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 1465

• regexp-A regular expression used to match the AS path attribute of a BGP path where the AS path is treated as an ASCII string. Default Configuration No AS path lists are configured by default. There are no default values for any of the parameters of this command. Command Mode Global Configuration User Guidelines The AS path attribute is a list of the autonomous system numbers along the path to the destination. An AS path access list is an ordered sequence of statements. Each statement specifies a regular expression and a permit or deny action. If the regular expression matches the AS path of the route expressed as an ASCII string, the route is considered a match and the statement's action is taken. An AS path list has an implicit deny statement at the end. If a path does not match any of the statements in an AS path list, the action is considered to be deny. Once you have created an AS path list, you cannot delete an individual statement. If you want to remove an individual statement, you must delete the AS path list and recreate it without the statement to be deleted. Statements are applied in the order in which they are created. New statements are added to the end of the list. The statement with the first matching regular expression is applied. N3200-ON Series switch allows configuration of up to 128 AS path access lists, with up to 64 statements each. To enter the question mark within a regular expression, you must first enter CTRL-V to prevent the CLI from interpreting the question mark as a request for help. Special Character asterisk brackets Symbol Behavior * Matches zero or more sequences of the pattern. [] Designates a range of single-character patterns. Layer 3 Routing Commands 1465