Cisco OL-15491-01 User Manual

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A-183

Cisco Content Services Gateway - 2nd Generation Release 2.0 Installation and Configuration Guide

OL-15491-01

Appendix A CSG2 Command Reference

match url

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As a further example, by default the following URLs do not match:

http://www.cisco.com/index.html

http://www.cisco.com/INDEX.html

However, if you have disabled case-sensitivity by entering the no ip csg case-sensitive command,
then all of the following URLs match:

http://www.cisco.com/index.html

http://www.cisco.com/INDEX.html

http://www.cisco.com/Index.html

http://www.cisco.com/IndeX.html

http://www.cisco.com/INdex.html

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When you configure URL match patterns for Real Time Streaming Protocol (RTSP) streams, be sure
to account for trailing stream IDs in RTSP stream names. For example, URL match pattern *.mpeg
does not match rtsp://1.1.1.254:554/movie.mpeg/streamid=0 because the stream name has a
trailing /streamid=0. To match such RTSP stream names, use a URL match pattern such as
*.mpeg*.

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You can include more than one wildcard in a CSG2 URL match pattern, but doing so greatly
increases the memory used for pattern-matching, effectively limiting the number of match patterns
that the CSG2 can ultimately support. Therefore, we highly recommend against the use of multiple
wildcards in match patterns.

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When using wildcards in URL match patterns, observe the following guidelines to optimize the
performance of the CSG2:

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Minimize the number of URL match patterns that are applied to a CSG2 content configuration.

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Minimize the number of keyword URL match patterns that you use. In general, it is better to use
multiple single-wildcard URL match patterns instead of individual keyword URL match
patterns.

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Combine several keyword URL match patterns into a single pattern by using UNIX
string-matching special characters. For example, *.movies_comedy.com/*.mpeg,
*.movies_action.com/*.mpeg, and *.movies_drama.com/*.mpeg can be combined into the
following single pattern:

*.movies_(comedy|action|drama).com/*.mpeg

And these patterns

*.movies_comedy.com/*.mpeg

*.movies_action.com/*.mpeg

*.movies_drama.com/*.mpeg

*.clips_comedy.com/*.mpeg

*.clips_action.com/*.mpeg

*.clips_drama.com/*.mpeg

can be combined into the following single pattern:

*.(movies|clips)*?*(comedy|action|drama).com/*.mpeg