Concept Guide

Operator Description
\b Matches the words that begin and end with the given expression. For example, \bdown matches
downlink, linkdown, shutdown.
\B Matches the middle of a word. For example, \Bvice matches services, devices, serviceID, deviceID,
and so on.
^ Matches the characters at starting position in a string. For example, ^bcd matches bcde or bcdf, but
not abcd.
[^] Matches any characters that are not listed between the brackets. For example, [^u]link matches
downlink, link, but not uplink.
? Matches any one occurrence of the pattern. For example, ?est matches best, nest, rest, test and so
on.
$ Matches the end of an input string. For example, eth$matches Eth, but not Ethernet.
* Matches the declared element multiple times if it exists. For example, eth* matches all occurrences
of eth, such as Eth, Ethernet, Eth0 and so on.
+ Matches the declared element one or more times. For example, aa+ matches occurrences of aa and
aaa.
() Matches nested characters. For example, (192)* matches any number of the character string 192.
| Matches the character patterns on either side of the vertical bar. You can use this expression to
construct a series of options.
\< Matches the beginning of the word. For example, \<wire matches wired, wireless and so on.
\> Matches the end of the word. For example, \>list matches blacklist, whitelist, and so on.
{n} Where n is an integer. Matches the declared element exactly the n times. For example, {2}link
matches uplink, but not downlink.
{n,} Where n is an integer. Matches the declared element at n times. For example, {2,}ink matches
downlink, but not uplink.
For information on how to use regular expressions in role and VLAN derivation rules, see the following topics:
l Configuring VLAN Derivation Rules on page 211
l Creating a Role Derivation Rule on page 207
Configuring a User Role for VLAN Derivation
This section describes the following procedures:
l Creating a User VLAN Role on page 214
l Assigning User VLAN Roles to a Network Profile on page 214
Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide Roles and Policies | 213