This is a question that comes up from time to time. I find that the easiest way to answer it is to start by remembering some fundamentals: switches forward at layer 2 and their forwarding table remembers MAC addresses and not IP addresses. Routers forward at layer 3 and their forwarding table remembers IP addresses. But to build the packet to forward layer 3 IP addresses the router must also have the layer 2 MAC address for every locally connected device to which the router may forward.
So when you look at the ARP table of the router you will see all the devices locally connected to which it has forwarded packets (which is essentially every locally connected device).
A switch forwards at layer 2 and its mac-address-table will be complete. The switch management interface is a layer 3 interface. The switch acts as an IP host. So the switch maintains an ARP table for the various devices with which its management interface has communicated. So the ARP table on the switch is not all local devices but only the devices to which the switch management interface has communicated.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.