[microblaze-uclinux] network bad working?

["Raul Camaras" <raul.camaras@xxxxxxxxxxxxxxxxxxx>]

Hello,

I have a problem with the network behaviour.
I don't use DHCPCD, and I set the IP address of the board with ifconfig
so:

#ifconfig eth0 192.168.100.6 netmask 255.255.0.0

after that, ifconfig looks so:

#ifconfig
eth0      Link encap:Ethernet  HWaddr 00:00:C0:A3:E5:44
          inet addr:192.168.100.6  Bcast:192.168.100.255
Mask:255.255.0.0
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:268 errors:0 dropped:0 overruns:0 frame:0
          TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:391104 (381.9 KiB)  TX bytes:23828 (23.2 KiB)
          Interrupt:4

I try to ping the board from a computer:

[Cent-OS-3 root]#ping 192.168.100.6
PING 192.168.100.6 (192.168.100.6) 56(84) bytes of data.
From 192.168.11.20 icmp_seq=8 Destination Host Unreachable
From 192.168.11.20 icmp_seq=8 Destination Host Unreachable
From 192.168.11.20 icmp_seq=8 Destination Host Unreachable
...

No answer. At the same time I execute tcpdump to see the traffic:

[Cent-OS-3 root]#tcpdump
tcpdump: listening on eth0
...
15:33:37.294086 arp who-has 192.168.100.6 tell 192.168.11.20
15:33:38.294003 arp who-has 192.168.100.6 tell 192.168.11.20
15:33:39.294014 arp who-has 192.168.100.6 tell 192.168.11.20
15:33:40.294109 arp who-has 192.168.100.6 tell 192.168.11.20
...

NO RESPONSE FROM BOARD!!

Now I execute a ping from the board:

# ping 192.168.11.20
PING 192.168.11.20 (192.168.11.20): 56 data bytes
64 bytes from 192.168.11.20: icmp_seq=0 ttl=64 time=1003.2 ms
64 bytes from 192.168.11.20: icmp_seq=1 ttl=64 time=11.1 ms
64 bytes from 192.168.11.20: icmp_seq=2 ttl=64 time=1.0 ms
...

It works! And now I execute the ping from the computer again:

[Cent-OS-3 root]#ping 192.168.100.6
PING 192.168.100.6 (192.168.100.6): 56(84) bytes of data
64 bytes from 192.168.100.6: icmp_seq=0 ttl=64 time=0.813 ms
64 bytes from 192.168.100.6: icmp_seq=1 ttl=64 time=0.669 ms
64 bytes from 192.168.100.6: icmp_seq=0 ttl=64 time=0.660 ms
...

IT WORKS NOW!!! After successful ping to computer, the board gave answer
to ping.

Why didn't it work at the beginning! And I need to make a ping from the
board?


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