![cisco ios show mac address table cisco ios show mac address table](https://sites.google.com/site/redesintroduccion/_/rsrc/1487952038962/5-2-1-7-lab---viewing-the-switch-mac-address-table/33.png)
![cisco ios show mac address table cisco ios show mac address table](https://1.bp.blogspot.com/-hXspMBwiBCY/WlXEa_d31YI/AAAAAAAAAyE/oCt0elHLm6cQr3x7Kf-FiXKFreVtoWtUwCLcBGAs/w1200-h630-p-k-no-nu/1.png)
This will populate the ARP cache of the router with entries for all machines on each subnet responding to ping.Īgain on the first hop routers, extract the list of ARP entries for each subnet: show ip arp interface vlan 100 Note, this should be the directed broadcast address of each subnet, rather than the 'all devices' broadcast IP of 255.255.255.255 In Cisco IOS, this can only be done from privileged exec mode. My suggestions for this (assuming Cisco managed routers/switches): Identify known devicesįrom your first hop router(s), do a broadcast ping on each subnet that is trunked to a switch supporting the office space (as opposed to any data centre space you may have). In this case, it sounds like the best option is to identify all switch ports that are connected to devices you know about. Not quite a dupe, but there's a similar question here, which has some suggestions about mapping an IP address to a switch port. I guess my question is as above, is there a way to display the IP or name of whatever is attached to that port on the switch?
#CISCO IOS SHOW MAC ADDRESS TABLE PC#
Is there a way, either by IP or name, to query a Cisco switch to tell you which port# that particular PC is plugged into?Ģ) There are a few ports on the switches which are lit up, indicating activity, but when I trace them back to the relay rack, they are attached to ports which are no longer in use, or no longer exist. But, it most definitely is active and on the network. Problem is, the port that it's plugged into on the switch, is not lit up, showing it as inactive. So I go to the relay rack, find port 28, and trace it to the switch. For example, there is a logged in laptop plugged into jack# 28. Today, I'm recreating a spreadsheet which lists all of our current physical network jacks, and where they are located in the resized office.ġ) A few of the network jack numbers don't seem to be syncing up with the labels on the relay racks. Prior to us closing it off, I jotted down the network jack #'s on the side to be closed and made sure to disconnect them from the switches in our server room. We gave back the unused space to the building management and had it walled off. Our company recently closed down half our office space, which was not being used.