New answers tagged arp
8
votes
Why don't routers answer ARP requests for IP addresses they can handle even if they aren't assigned that IP address themselves?
As many have answered, the function to providing routing when an endstation is not aware of a router is called Proxy ARP. It used to be commonly enabled by routers, to provide service to ...
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2
votes
Why don't routers answer ARP requests for IP addresses they can handle even if they aren't assigned that IP address themselves?
Apparently someone did do that. Btw it's called Proxy ARP.
The linked youtube video also illustrates why you shouldn't do that. It's basically because you'd fill the ARP cache with more and more ...
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9
votes
Why don't routers answer ARP requests for IP addresses they can handle even if they aren't assigned that IP address themselves?
OK, so you have these (theoretical) options:
The TCP/IP way:
Any time I want to send a packet to a new IP not on the local network:
I lookup the IP of the default gateway (in the local routing table)...
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4
votes
Why don't routers answer ARP requests for IP addresses they can handle even if they aren't assigned that IP address themselves?
Let's say that we didn't have any default gateway ip address configured in the device that wants to send IP packets.
Without a route & gateway to the destination, a host can only drop the packet. ...
- 88.1k
8
votes
Accepted
Why don't routers answer ARP requests for IP addresses they can handle even if they aren't assigned that IP address themselves?
Let's say the router didn't have any IP address assigned either
The router would not be an IP router for that router interface because it would not know about the network directly connected to it. A ...
- 101k
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