logging_vty_test> enable

logging_vty_test# show running-config
...
log stderr
... !logging level all
  logging level aa debug
  logging level bb info
  logging level ccc notice
  logging level dddd error
  logging level eee fatal
...

logging_vty_test# configure terminal
logging_vty_test(config)# no log stderr
logging_vty_test(config)# exit

logging_vty_test# logging enable
logging_vty_test# logging filter all 1
logging_vty_test# logging print category-hex 0
logging_vty_test# logging print category 1
logging_vty_test# logging print level 1
logging_vty_test# logging color 0
logging_vty_test# logging print file 0


logging_vty_test# list
... !logging
  logging enable
  logging disable
  logging filter all (0|1)
  logging color (0|1)
  logging timestamp (0|1)
  logging print extended-timestamp (0|1)
  logging print category (0|1)
  logging print category-hex (0|1)
  logging print level (0|1)
  logging print file (0|1|basename) [last]
  logging set-log-mask MASK
  logging level (all|aa|bb|ccc|dddd|eee|lglobal|llapd|linp|lmux|lmi|lmib|lsms|lctrl|lgtp|lstats|lgsup|loap|lss7|lsccp|lsua|lm3ua|lmgcp|ljibuf) (debug|info|notice|error|fatal)
  show logging vty
... !logging

logging_vty_test# logging ?
  enable        Enables logging to this vty
  disable       Disables logging to this vty
  filter        Filter log messages
  color         Configure color-printing for log messages
  timestamp     Configure log message timestamping
  print         Log output settings
  set-log-mask  Set the logmask of this logging target
  level         Set the log level for a specified category

logging_vty_test# logging level ?
  all      Global setting for all subsystems
  aa       Antropomorphic Armadillos (AA)
  bb       Bidirectional Breadspread (BB)
  ccc      Chaos Communication Congress (CCC)
  dddd     Dehydrated Dribbling Duck Dunkers (DDDD)
  eee      Exhaustive Entropy Extraction (EEE)
  lglobal  Library-internal global log family
...

logging_vty_test# logging level aa ?
  debug   Log debug messages and higher levels
  info    Log informational messages and higher levels
  notice  Log noticeable messages and higher levels
  error   Log error messages and higher levels
  fatal   Log only fatal messages

logging_vty_test# logging level all ?
  debug   Log debug messages and higher levels
  info    Log informational messages and higher levels
  notice  Log noticeable messages and higher levels
  error   Log error messages and higher levels
  fatal   Log only fatal messages


logging_vty_test# log-sweep
DAA DEBUG Log message for DAA on level LOGL_DEBUG
DAA INFO Log message for DAA on level LOGL_INFO
DAA NOTICE Log message for DAA on level LOGL_NOTICE
DAA ERROR Log message for DAA on level LOGL_ERROR
DAA FATAL Log message for DAA on level LOGL_FATAL
DBB INFO Log message for DBB on level LOGL_INFO
DBB NOTICE Log message for DBB on level LOGL_NOTICE
DBB ERROR Log message for DBB on level LOGL_ERROR
DBB FATAL Log message for DBB on level LOGL_FATAL
DCCC NOTICE Log message for DCCC on level LOGL_NOTICE
DCCC ERROR Log message for DCCC on level LOGL_ERROR
DCCC FATAL Log message for DCCC on level LOGL_FATAL
DDDDD ERROR Log message for DDDDD on level LOGL_ERROR
DDDDD FATAL Log message for DDDDD on level LOGL_FATAL
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# logging level all fatal
logging_vty_test# log-sweep
DAA FATAL Log message for DAA on level LOGL_FATAL
DBB FATAL Log message for DBB on level LOGL_FATAL
DCCC FATAL Log message for DCCC on level LOGL_FATAL
DDDDD FATAL Log message for DDDDD on level LOGL_FATAL
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# logging level all error
logging_vty_test# log-sweep
DAA ERROR Log message for DAA on level LOGL_ERROR
DAA FATAL Log message for DAA on level LOGL_FATAL
DBB ERROR Log message for DBB on level LOGL_ERROR
DBB FATAL Log message for DBB on level LOGL_FATAL
DCCC ERROR Log message for DCCC on level LOGL_ERROR
DCCC FATAL Log message for DCCC on level LOGL_FATAL
DDDDD ERROR Log message for DDDDD on level LOGL_ERROR
DDDDD FATAL Log message for DDDDD on level LOGL_FATAL
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# logging level all notice
logging_vty_test# log-sweep
DAA NOTICE Log message for DAA on level LOGL_NOTICE
DAA ERROR Log message for DAA on level LOGL_ERROR
DAA FATAL Log message for DAA on level LOGL_FATAL
DBB NOTICE Log message for DBB on level LOGL_NOTICE
DBB ERROR Log message for DBB on level LOGL_ERROR
DBB FATAL Log message for DBB on level LOGL_FATAL
DCCC NOTICE Log message for DCCC on level LOGL_NOTICE
DCCC ERROR Log message for DCCC on level LOGL_ERROR
DCCC FATAL Log message for DCCC on level LOGL_FATAL
DDDDD NOTICE Log message for DDDDD on level LOGL_NOTICE
DDDDD ERROR Log message for DDDDD on level LOGL_ERROR
DDDDD FATAL Log message for DDDDD on level LOGL_FATAL
DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# logging level all debug
logging_vty_test# log-sweep
DAA DEBUG Log message for DAA on level LOGL_DEBUG
DAA INFO Log message for DAA on level LOGL_INFO
DAA NOTICE Log message for DAA on level LOGL_NOTICE
DAA ERROR Log message for DAA on level LOGL_ERROR
DAA FATAL Log message for DAA on level LOGL_FATAL
DBB DEBUG Log message for DBB on level LOGL_DEBUG
DBB INFO Log message for DBB on level LOGL_INFO
DBB NOTICE Log message for DBB on level LOGL_NOTICE
DBB ERROR Log message for DBB on level LOGL_ERROR
DBB FATAL Log message for DBB on level LOGL_FATAL
DCCC DEBUG Log message for DCCC on level LOGL_DEBUG
DCCC INFO Log message for DCCC on level LOGL_INFO
DCCC NOTICE Log message for DCCC on level LOGL_NOTICE
DCCC ERROR Log message for DCCC on level LOGL_ERROR
DCCC FATAL Log message for DCCC on level LOGL_FATAL
DDDDD DEBUG Log message for DDDDD on level LOGL_DEBUG
DDDDD INFO Log message for DDDDD on level LOGL_INFO
DDDDD NOTICE Log message for DDDDD on level LOGL_NOTICE
DDDDD ERROR Log message for DDDDD on level LOGL_ERROR
DDDDD FATAL Log message for DDDDD on level LOGL_FATAL
DEEE DEBUG Log message for DEEE on level LOGL_DEBUG
DEEE INFO Log message for DEEE on level LOGL_INFO
DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# ! 'logging level all' overrides everything, be it stronger or weaker
logging_vty_test# logging level all notice
logging_vty_test# logging level eee debug
logging_vty_test# log-sweep eee
DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# logging level all notice
logging_vty_test# logging level eee fatal
logging_vty_test# log-sweep eee
DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# ! Old 'logging level all everything' has no effect
logging_vty_test# logging level all everything
% Ignoring deprecated logging level 'everything' keyword
logging_vty_test# log-sweep eee
DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
DEEE ERROR Log message for DEEE on level LOGL_ERROR
DEEE FATAL Log message for DEEE on level LOGL_FATAL

logging_vty_test# ! There is currently no way to remove the 'logging level all' level!