Management and Configuration Guide K/KA/KB.15.15

Disable LinkUp/Down Syslog Messages Based on Port
This feature provides a per-port basis filter that can restrict the logging of events that are associated
with a link status change. Unimportant linkup/linkdown events can be filtered out, avoiding
unwanted messages in the event log and reducing troubleshooting time.
The specific port-based events to be controlled are:
RMON_PMGR_PORT_UP—Indicates that the port has changed from and off-line to an on-line state.
To be online the port must be both connected to the LAN and enabled through configuration.
RMON_PMGR_PORT_DOWN—Indicates that the port has changed from an on-line state to an
offline state. For this state to occur, the port is physically disconnected from the LAN, disabled
through the configuration, or both.
The following rules apply:
• Only one filter can be enabled at a time.
• The maximum number of configured filters is 10.
• A filter is identified by a unique name of up to 16 printable ASCII characters.
• Filters can be dynamically replaced; the newly enabled filter automatically disables the previous
filter.
• A filter always contains a default sub-filter that functions as the filtering rules terminator.
• To apply filtering to an event logging process, the filter must be explicitly enabled from the
CLI.
• Enabled filter modules can be dynamically modified; the changes will take effect immediately.
A filter module may include up to 19 option sub-filters and a default sub-filter. The sub-filter types
are:
• Severity—checks the severity level of the event log message. The severity values are:
◦ major
◦ warning
◦ error
◦ info
◦ debug
• Event number—Checks the event number of the event log message.
• Regular expression—Checks everything beyond the date/time portion of the event log message.
A sub-filter has a sequence number, criteria to be matched, and a resulting action when a match
occurs. All of the parameters must be specified in order to create the sub-filter.
• Sequence number: Used for the ordering of sub-filters. Range 1-98.
• Matching criteria: Can be the severity level, event number, or a regular expression.
• Action to execute: When a match occurs, the resulting action is either permit the logging of
the event, or deny the logging of the event.
The following sub-filter rules apply:
• Up to 19 optional sub-filters and a default sub-filter are allowed in a filter module.
• Sub-filters in the filter module can be of the same or different types.
• Sub-filter entries can be modified with new criteria and action definitions.
418 Troubleshooting