Users Guide

1061| External Services Interface Dell Networking W-Series ArubaOS 6.5.x| User Guide
Configuring an ESI Group, Add the Health-Check Ping and ESI Servers
Use these CLI commands to configure an ESI server group, identify its associated ping health-check method,
and associate a server with this group:
esigroupname
pingprofile_name
serverserver_identity
Using the ESI Group in a Session Access Control List
Use these CLI commands to define the redirection filter for sending traffic to the ESI server.
ip access-listsessionpolicy
useranysvc-httpredirectesi-groupgroupdirectionboth
Understanding Basic Regular Expression (BRE) Syntax
The ESI syslog parser supports regular expressions created using the Basic Regular Expression (BRE) syntax
described in this section. BRE syntax consists of instructions—character-matching operators (described in
Table 248), repetition operators (described in Table 249), or expression anchors (described in Table 250)—used
to defined the search or match target.
This section contains the following topics:
l “Character-Matching Operators” on page512
l “Regular Expression Repetition Operators” on page513
l “Regular Expression Anchors” on page513
l “References” on page514
Character-Matching Operators
Character-matching operators define what the search will match.
Operator Description Sample Result
. Match any one character. grep.ord sample.txt Matches ford, lord, 2ord, etc.
in the file sample.txt.
[] Match any one character
listed between the brackets
grep [cng]ord sample.txt Matches only cord, nord, and
gord
[^] Match any one character not
listed between the brackets
grep [^cn]ord sample.txt Matches lord, 2ord, etc., but
not cord or nord
grep [a-zA-Z]ord
sample.txt
Matches aord, bord, Aord,
Bord, etc.
grep [^0-9]ord
sample.txt
Matches Aord, aord, etc., but
not 2ord, etc.
Table 248: Character-matching operators in regular expressions
Regular Expression Repetition Operators
Repetition operators are quantifiers that describe how many times to search for a specified string. Use them
in conjunction with the character-matching operators in
Table 249 to search for multiple characters.