You can see the event log with
This assumes you have enabled logging:
logging buffered 32768 informational
Note that if someone unplugs the device, it's not going to log that event.
show logging displays the event log. For some events, you can (and may need to) explicitly configure logging.
Additionally, you can log to an external (syslog) server which can store more entries than the limited internal log and doesn't lose its entries on power loss.
Ok apparently that's what the Splunk plugin does as well.
See "Splunk Add-on for Cisco ASA" https://splunkbase.splunk.com/app/1620/
# direction is inbound
REGEX = -30201:\s*(\S+)\s+([Ii]nbound)\s+(\S+)(?:\s+connection)?\s+(\d+)\s+for\s+([^:\s]+)\s*:\s*(?:((?:[\d+\.]+|[a-fA-F0-9]*:[a-fA-F0-9]*:[a-fA-...
What you have is correct. Changing the modes does not remove all of the configuration that the port previously had, in case you need to switch back for any reason. So, whatever it says in the switchport mode line is what the port’s operational mode will be (access or trunk). The portion that still references the access VLAN will be ignored and is ...
If Router B is disconnected, the interface on Router A goes down because there is no connection. When an interface is down, it has no address, so the address is withdrawn from any routing tables.
You could do something like put a switch between the routers. When Router B is disconnected, Router A would still have a connection on that interface, and the ...
I realise this thread is pretty old now, but I've just been looking for help on IP Helpers and found this article very useful to explain IP Helper addressing, how it works and its general application in a network.
I didn't realise it was a Cisco-specific thing so spent quite a bit of time trying to find information on it from Microsoft.
according to comments in the question, the actual topology is two bridges:
B1 (root) --- B2.
According to the specification (IEEE Std 802.1w-2001, sec 17.7)
Configuration Messages are transmitted if the information to be transmitted by a Designated Port changes. In addition, Designated Ports transmit Configuration Messages at regular intervals to guard ...