Arp request

[admin_2]

I have this situation on my Ethernet:

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on my PC I have an IP: 10.80.2.3 and

mask 255.0.0.0; gateway 10.80.2.1;

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on my router 2610:

interface FastEthernet0/0

ip address 10.80.2.1 255.0.0.0

no ip directed-broadcast

ip nat inside

duplex auto

speed 10

ip classless

ip route 0.0.0.0 0.0.0.0 10.80.2.2

ip route 10.10.0.0 255.255.0.0 192.168.98.1

ip route 10.13.0.0 255.255.0.0 192.168.98.1

ip route 192.168.0.0 255.255.255.0 192.168.98.1

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Observing my sniffer, I see that Arp request for 10.10.0.103 from PC is

immediately responded by arp reply

from router.

Why?, If I haven't configured Proxy Arp!

[#2]

1) Proxy arp is on by default. Use "no ip proxy-arp" under the Fast Ethernet interface to turn it off.

2) If you aren't planning on using proxy arp, your configuration is invalid. A PC with the IP address 10.80.2.3 and mask 255.0.0.0 will perceive 10.10.0.103 as DIRECTLY CONNECTED, it will not use a default or any other gateway to reach it. Right now your PC considers 10.0.0.0-10.255.255.255 to be directly connected.

If you want to route between those two networks, you need to change the mask on the PC's network to be much smaller.