show logging
Displays the Syslog messages in the device local buffer.
Modes
User EXEC mode
Privileged EXEC mode
Global configuration mode
Interface configuration mode
The
show logging command displays the following information.
| Output field | Description |
|---|---|
| Syslog logging | The state (enabled or disabled) of the Syslog buffer. |
| messages dropped | The number of Syslog messages dropped due to user-configured filters. By default, the software logs messages for all Syslog levels. You can disable individual Syslog levels, in which case the software filters out messages at those levels. Each time the software filters out a Syslog message, this counter is incremented. |
| flushes | The number of times the Syslog buffer has been cleared by the clear logging command or equivalent Web Management Interface option. |
| overruns | The number of times the dynamic log buffer has filled up and been cleared to hold new entries. For example, if the buffer is set for 100 entries, the 101st entry causes an overrun. After that, the 201st entry causes a second overrun. |
| level | The message levels that are enabled. Each letter represents a message type and is identified by the key (level code) beneath the value. If you disable logging of a message level, the code for that level is not listed. |
| messages logged | The total number of messages that have been logged since the software was loaded. |
| level code | The message levels represented by the one-letter codes. |
Examples
The following is sample output from the
show logging command.
device# show logging
Syslog logging: enabled (0 messages dropped, 0 flushes, 24 overruns)
Buffer logging: level ACDMEINW, 50 messages logged
level code: A=alert C=critical D=debugging M=emergency E=error
I=informational N=notification W=warning
Static Log Buffer:
Jan 1 00:00:47:I:System: Stack unit 1 PSU fan direction mismatch
Dynamic Log Buffer (50 lines):
Jan 3 20:23:10:I:Security: startup-config was changed by operator from console
Jan 3 20:17:25:I:Security: startup-config was changed by operator from console
Jan 3 19:50:43:I:MSTP: MST 1 Port 1/1/11:1 - Bridge TC Event
Jan 3 19:50:43:I:MSTP: MST 0 Port 1/1/11:1 - Bridge TC Event
Jan 3 19:49:29:I:System: Logical link on dynamic lag interface ethernet 1/1/9:3 is up.
Jan 3 19:49:29:I:System: Interface ethernet 1/1/9:3, state up
Jan 3 19:49:29:I:System: Logical link on dynamic lag interface ethernet 1/1/9:1 is up.
Jan 3 19:49:29:I:System: Interface ethernet 1/1/9:1, state up
Jan 3 19:49:29:I:MRP: Interface ethernet 1/1/9:1 of ring 51 Vlan 51, changing to forwarding
Jan 3 19:49:29:I:MSTP: MST 1 Port 1/1/11:1 - Bridge TC Event
Jan 3 19:49:29:I:MSTP: MST 1 Port 1/1/9:1 - Bridge TC Event
Jan 3 19:49:29:I:MSTP: MST 1 Port 1/1/9:1 - FORWARDING
Jan 3 19:49:29:I:MSTP: MST 1 Port 1/1/9:1 - LEARNING
Jan 3 19:49:29:I:MSTP: MST 0 Port 1/1/11:1 - Bridge TC Event
Jan 3 19:49:29:I:MSTP: MST 0 Port 1/1/9:1 - Bridge TC Event
Jan 3 19:49:29:I:MSTP: MST 0 Port 1/1/9:1 - FORWARDING
Jan 3 19:49:29:I:MSTP: MST 0 Port 1/1/9:1 - LEARNING
Jan 3 19:49:29:I:System: Logical link on dynamic lag interface ethernet 1/1/9:4 is up.
Jan 3 19:49:29:I:System: Interface ethernet 1/1/9:4, state up
Jan 3 19:49:29:I:System: Logical link on dynamic lag interface ethernet 1/1/9:2 is up.
Jan 3 19:49:29:I:System: Interface ethernet 1/1/9:2, state up
Jan 3 19:49:29:I:MRP: Interface ethernet 1/1/9:1 of ring 51 Vlan 51, changing to preforwarding
Jan 3 19:49:29:I:MSTP: MST 1 Port 1/1/9:1 - DISCARDING
Jan 3 19:49:29:I:MSTP: MST 0 Port 1/1/9:1 - DISCARDING
Jan 3 19:49:29:I:Trunk: Group (1/1/9:1, 1/1/9:2, 1/1/9:3, 1/1/9:4) created by 802.3ad link-aggregation module.
Jan 3 19:49:12:I:System: Interface ethernet 1/1/9:2, state down
Jan 3 19:49:12:I:System: Logical link on dynamic lag interface ethernet 1/1/9:2 is down.
Jan 3 19:49:12:I:MRP: Interface ethernet 1/1/9:1 of ring 51 Vlan 51, changing to disabled
Jan 3 19:49:12:I:MSTP: MST 0 Port 1/1/9:1 - DISCARDING
Jan 3 19:49:12:I:MSTP: MST 1 Port 1/1/9:1 - DISCARDING
Jan 3 19:49:12:I:Trunk: Group (1/1/9:1, 1/1/9:2, 1/1/9:3, 1/1/9:4) removed by 802.3ad link-aggregation module.
Jan 3 19:49:12:I:System: Interface ethernet 1/1/9:4, state down
Jan 3 19:49:12:I:System: Logical link on dynamic lag interface ethernet 1/1/9:4 is down.
Jan 3 19:49:12:I:System: Interface ethernet 1/1/9:1, state down
Jan 3 19:49:12:I:System: Logical link on dynamic lag interface ethernet 1/1/9:1 is down.
Jan 3 19:49:12:I:System: Interface ethernet 1/1/9:3, state down
Jan 3 19:49:12:I:System: Logical link on dynamic lag interface ethernet 1/1/9:3 is down.