Hi,
I have a pc with two Ethernet interfaces linked by a cable.
I'm trying to ping a interface from the other.

eth3 10.0.0.33 Masque:255.255.0.0
eth4 10.0.0.99 Masque:255.255.0.0

# ping 10.0.0.99 -I eth3
PING 10.0.0.99 (10.0.0.99) from 10.0.0.33 eth3: 56(84) bytes of data.
From 10.0.0.33 icmp_seq=1 Destination Host Unreachable

Routes are the default ones:
10.0.0.0 * 255.255.0.0 U 0 0 0 eth3
10.0.0.0 * 255.255.0.0 U 0 0 0 eth4

What should I do?

Thanks a lot!

What you are doing makes no sense. If you send a packet to 10.0.0.42, which interface do you expect it to be sent on? What is your default gateway?

What is making no sense?
Just tell me what ip/mask and routes should I set.
I try many things but I didn't make it.
Thks

Why are you trying to put two interfaces in the same subdomain?

From a technet page.

"If you look at RFC792 on the ICMP protocol it shows that destination unreachable messages are generated by gateways when there is either no route to the destination host or some other protocol/port issue."

While I tend to agree on that there is a lot of other things going on too with this. Part is a design of the OS and IPv4 and actual chips in the nic.


I kind of think this sort of test is useless and that other tools would be better. Consider changing this entire test so that you are doing a real test from a subnet to a router back to the different subnet.