Specifications

106 ExtremeWare XOS 10.1 Concepts Guide
Status Monitoring and Statistics
VID - Virtual LAN ID (tag), VLAN - Virtual LAN name
L4 - Layer-4 Port #, Num - Number, Str - String
Nbr - Neighbor, Rtr - Routerid, EAPS - EAPS Domain
Proc - Process Name
Strict Match : Y - every match parameter entered must be present in the event
N - match parameters need not be present in the event
The show log configuration filter command shows each filter item, in the order that it will be applied
and whether it will be included or excluded. The above output shows the three filter items, one
excluding the event STP.CreatPortMsgFail, one including events from the STP.InBPDU component, and
the next including the remaining events from the STP component. The severity value is shown as “*”,
indicating that the component’s default severity threshold controls which messages are passed. The
Parameter(s) heading is empty for this filter, since no match was configured for this filter. Matches are
discussed in the section, “Matching Expressions”.
Each time a filter item is added to or deleted from a given filter, the events specified are compared
against the current configuration of the filter to try to logically simplify the configuration. Existing items
will be replaced by logically simpler items if the new item enables rewriting the filter. If the new item is
already included or excluded from the currently configured filter, the new item is not added to the filter.
Matching Expressions
You can specify that messages that reach the target match a specified match expression. The message
text is compared with the match expression to determine whether to pass the message on. To require
that messages match a match expression, is to use the following command:
configure log target [console | memory-buffer | nvram | session | syslog [all |
<ipaddress> [local0 ... local7]]] match [any |<match-expression>]
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 only compared with the messages that have already passed the target’s filter. For more
information on controlling the format of the messages, see the section, “Formatting Event Messages”.
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 20 shows some examples of regular expressions.
Table 20: Simple regular expressions
Regular Expression Matches Does Not Match
port port 2:3
import cars
portable structure
poor
por
pot
..ar baar
bazaar
rebar
bar