안녕하세요. EZ-S3C2440에서 네트워크 문제가 해결이 잘 안되어 질문을 드립니다.
 
네트워크 구성을 먼저 이야기 하겠습니다.

인터넷 - KT ADSL(221.146.xxx.xxx)  - IP공유기 -(192.168.1.1) - 스위치 허브 - EZ-S3C2440 (192.168.1.58)
                                                                                                                                + LINUX Server(192.168.1.59)


LINUX Server는 인터넷과 통신이 잘 됩니다.
EZ-S3C2440   은 인터넷과 통신이 안 됩니다.

LINUX Server 는 192.168.1.1 와 통신이 잘 됩니다.
EZ-S3C2440   은  192.168.1.1 와 통신이  됩니다.

LINUX Server 와 EZ-S3C2440는 통신이 잘 됩니다.


[root@Embedded sysconfig]$ ifconfig -a
dummy0    Link encap:Ethernet  HWaddr 56:7F:90:7C:F1:10
          BROADCAST NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr 00:01:59:43:00:FA
          inet addr:192.168.1.58  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::201:59ff:fe43:fa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:858 errors:0 dropped:0 overruns:0 frame:0
          TX packets:61 errors:0 dropped:0 overruns:0 carrier:0
          collisions:1 txqueuelen:1000
          RX bytes:55858 (54.5 KiB)  TX bytes:4840 (4.7 KiB)
          Interrupt:60 Base address:0x2000 DMA chan:ff

ip6tnl0   Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          NOARP  MTU:1460  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:856 (856.0 B)  TX bytes:856 (856.0 B)

sit0      Link encap:IPv6-in-IPv4
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)


[root@Embedded sysconfig]$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
[root@Embedded sysconfig]$

route를 실행했을때
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0

default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
사이에 1~2초간 delay가 생깁니다.


[root@linux ~]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:03:47:B0:73:FB
          inet addr:192.168.1.59  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::203:47ff:feb0:73fb/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16247 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3994 errors:15 dropped:0 overruns:0 carrier:15
          collisions:348 txqueuelen:1000
          RX bytes:2895636 (2.7 MiB)  TX bytes:788768 (770.2 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:2634 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2634 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:155818 (152.1 KiB)  TX bytes:155818 (152.1 KiB)

pan0      Link encap:Ethernet  HWaddr 9A:7A:A5:E9:A8:8E
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

virbr0    Link encap:Ethernet  HWaddr 9A:AB:23:DC:48:04
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          inet6 addr: fe80::98ab:23ff:fedc:4804/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:5237 (5.1 KiB)

[root@linux ~]# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     0      0        0 eth0
192.168.122.0   *               255.255.255.0   U     0      0        0 virbr0
link-local      *               255.255.0.0     U     0      0        0 eth0
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
[root@linux ~]#