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--- cisco_interfaces_in_use [2024/01/12 20:30] – [Show the Mac Address Table] walkeradmin
+++ cisco_interfaces_in_use [2024/01/12 20:37] (current) – [Show the Mac Address Table] walkeradmin
@@ Line 131: / Line 131: @@
        a4bf.0169.b7af    DYNAMIC     Gi0/5
 </file>
+It can be seen that this is interface 5 on our Cisco, that is in VLAN2 and there is a device connected to it with the MAC Address <color #ed1c24>a4-bf-01-69-b7-af</color>.
+\\
+\\
+I have logged in to the server that I know is connected to this interface (the servers eno3 is connected) and if I run the command (Linux):
+\\
+<file>
+ip a show eno3
+: eno3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master data-out state UP group default qlen 1000
+    link/ether a4:bf:01:69:b7:af brd ff:ff:ff:ff:ff:ff
+    altname enp61s0f2
+</file>
+We can see that the link/ether address is listed as: a4:bf:01:69:b7:af
+\\
+\\
+==== Look for a specific MAC Address ====
+Because there could be many MAC addresses present on an interface when you use the command <color #ed1c24>sh mac address-table</color> we can use a simple filter to only show what we require: (remember, our last search revealed that the MAC Address on Gi05 ended in 'af'
+\\
+<file>
+sh mac address-table | incl af
+Now the only result we get back is this:
+    a4bf.0169.b7af    DYNAMIC     Gi0/5
+</file>
+We may not know what MAC we are looking for, but if we  do this is very useful.
+\\
+\\