Cisco ASA Series Cli Configuration Manual page 1975

Chapter 1 Configuring Logging
Command
Step 3
logging permit-hostdown
Example:
hostname(config)# logging permit-hostdown
Step 4
logging facility number
Example:
hostname(config)# logging facility 21
Sending Syslog Messages to the Internal Log Buffer
To send syslog messages to the internal log buffer, perform the following steps:
Command
Step 1
logging buffered {severity_level | message_list}
Example:
hostname(config)# logging buffered critical
hostname(config)# logging buffered level 2
hostname(config)# logging buffered notif-list
Step 2
logging buffer-size bytes
Example:
hostname(config)# logging buffer-size 16384
Step 3
Choose one of the following options:
logging flash-bufferwrap
Example:
hostname(config)# logging flash-bufferwrap
Purpose
(Optional) Disables the feature to block new connections
when a TCP-connected syslog server is down. If the ASA or
ASASM is configured to send syslog messages to a
TCP-based syslog server, and if either the syslog server is
down or the log queue is full, then new connections are
blocked. New connections are allowed again after the syslog
server is back up and the log queue is no longer full. For more
information about the log queue, see the
Logging Queue" section on page
(Optional) Sets the logging facility to a value other than 20,
which is what most UNIX systems expect.
Purpose
Specifies which syslog messages should be sent to
the internal log buffer, which serves as a temporary
storage location. New messages are appended to the
end of the list. When the buffer is full, that is, when
the buffer wraps, old messages are overwritten as new
messages are generated, unless you configure the
ASA and ASASM to save the full buffer to another
location. To empty the internal log buffer, enter the
clear logging buffer command.
Changes the size of the internal log buffer. The buffer
size is 4 KB.
When saving the buffer content to another location,
the ASA and ASASM create log files with names that
use the following time-stamp format:
LOG-YYYY-MM-DD-HHMMSS.TXT
where YYYY is the year, MM is the month, DD is the
day of the month, and HHMMSS is the time in hours,
minutes, and seconds.
The ASA and ASASM continue to save new
messages to the internal log buffer and saves the full
log buffer content to the internal flash memory.
Cisco ASA Series CLI Configuration Guide
Configuring Logging
"Configuring the
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