Dell Force10 S55T FTOS Command Line Reference Guide for the S55 System FTOS 8. - Page 257
ip as-path access-list
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• permit • show config • show ip as-path-access-lists deny e Create a filter to drop routes that match the route's AS-PATH attribute. Use regular expressions to identify which routes are affected by the filter. Syntax deny as-regular-expression To remove this filter, use the no deny as-regular-expression command. Parameters as-regular-expression Enter a regular expression to match BGP AS-PATH attributes. Use one or a combination of the following: • . = (period) matches on any single character, including white space • * = (asterisk) matches on sequences in a pattern (zero or more sequences) • + = (plus sign) matches on sequences in a pattern (one or more sequences) • ? = (question mark) matches sequences in a pattern (0 or 1 sequences). You must enter an escape sequence (CTRL+v) prior to entering the ? regular expression. • [ ] = (brackets) matches a range of single-character patterns. • ^ = (caret) matches the beginning of the input string. (If the caret is used at the beginning of a sequence or range, it matches on everything BUT the characters specified.) • $ = (dollar sign) matches the end of the output string. • _ = (underscore) matches a comma (,), left brace ({), right brace (}), left parenthesis, right parenthesis, the beginning of the input string, the end of the input string, or a space. • | = (pipe) matches either character. Defaults Not configured Command Modes AS-PATH ACL Usage The regular expression must match part of the ASCII-text in the AS-PATH attribute of the BGP route. Information Command History Version 8.1.1.0 pre-Version 6.1.1.0 Introduced on E-Series ExaScale Introduced for E-Series ip as-path access-list e Enter the AS-PATH ACL mode and configure an access control list based on the BGP AS_PATH attribute. Syntax ip as-path access-list as-path-name To delete an AS-PATH ACL, use the no ip as-path access-list as-path-name command. Access Control Lists (ACL) | 257