Netgear XCM8810 Chassis User Manual - Page 222

NETGEAR 8800 User Manual Matching Expressions You can configure the switch so messages reaching the target match a specified match expression. The message text is compared with the configured match expression to determine whether to pass the message on. To require that messages match a match expression, use the following command: configure log target [console | memory-buffer | nvram | primary-msm | primary-node| backup-msm | backp-node | session | syslog [all | | {vr } [local0 ... local7]]] match [any |] The messages reaching the target will match the match-expression, a simple regular expression. The formatted text string that makes up the message is compared with the match expression and is passed to the target if it matches. This command does not affect the filter in place for the target, so the match expression is compared only with the messages that have already passed the target's filter. For more information on controlling the format of the messages, see Formatting Event Messages on page 225. Simple Regular Expressions A simple regular expression is a string of single characters including the dot character (.), which are optionally combined with quantifiers and constraints. A dot matches any single character, while other characters match only themselves (case is significant). Quantifiers include the star character (*) that matches zero or more occurrences of the immediately preceding token. Constraints include the caret character (^) that matches at the beginning of a message and the currency character ($) that matches at the end of a message. Bracket expressions are not supported. There are a number of sources available on the Internet and in various language references describing the operation of regular expressions. Table 28 shows some examples of regular expressions. Table 28. Simple Regular Expressions Regular Expression port ..ar port.*vlan myvlan$ Matches port 2:3 import cars portable structure baar bazaar rebar port 2:3 in vlan test add ports to vlan port/vlan delete myvlan error in myvlan Does Not Match poor por pot bar myvlan port 2:3 ports 2:4,3:4 myvlan link down 222 | Chapter 8. Status Monitoring and Statistics