Antonio Di Bacco wrote:
Anyone could explain this?
Two linux systems connected:
System A <=========> System B
eth0 eth0
Each system ha the following config:
# routing enabled
net.ipv4.ip_forward=1
#ethernet with no address associated and NOARP set
eth0 Link encap:Ethernet HWaddr 08:00:3E:26:24:65
UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:1306 errors:0 dropped:0 overruns:0 frame:0
TX packets:1325 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:732864 (715.6 KiB) TX bytes:61643 (60.1 KiB)
Base address:0x3c00
# Routing table
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.10.10.10 * 255.255.255.255 UH 0 0 0 eth0
I'm on System A and try to ping 10.10.10.10 but no answer. Where is the
problem?
Which system has 10.10.10.10? None. So how can any system answer? Even
if there was a 10.10.10.10, you disabled the arp mechanism, so you can
never find out where it is. Finaly, for the return packets exactly the
same problem occurs.
If you want to make a point to point connection over ethernet:
- Either just configure a subnet there.
- Or:
- Assign addresses to the interfaces (can be the same address as
another interface on the same box)
- Create static arp addresses for the other box
- Create routes as above for the address of the other box
I think you will still have to enable arp for this to work, in which
case you can skip the static arp entries.
HTH,
M4
