MX6UL-S核心板 自制底板NET1网口正常，但NET2网口无法ping通
如题，采用MX6UL-S核心板 + 自制底板，自制底板基于官方MX6UL-S底板原理图和PCB修改，去除大部分设计，保留上电复位电路（包括SN74HC595D）、双网卡、USB、SD卡、RTC时钟、启动方式等。调试双网卡时，发现NET1网卡（对应eth1）可正常工作，但NET2网卡（对应eth0）ping不通。双网卡电路原理图没改动。具体现象如下：1. 连上网线后，RJ45的LINK灯是常绿的，DATA灯黄色一闪一闪的；插拔网线，debug串口都能正常打印信息：
root@fl-imx6ull:~#
root@fl-imx6ull:~# fec 20b4000.ethernet eth0: Link is Down
fec 20b4000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
2. 系统启动时，NET1网卡初始化正常：
Starting udev
udevd: starting version 3.1.5
bootlogd: cannot allocate pseudo tty: No such file or directory
1-0030 supply DOVDD not found, using dummy regulator
1-0030 supply DVDD not found, using dummy regulator
1-0030 supply AVDD not found, using dummy regulator
ov9650_read_reg:write reg error:reg=1c
camera ov9650 is not found
FAT-fs (mmcblk0p1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
ALSA: Restoring mixer settings...
/usr/sbin/alsactl: load_state:1735: No soundcards found...
INIT: Entering runlevel: 5
Configuring network inte**ces... fec 20b4000.ethernet eth0: Freescale FEC PHY driver (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
fec 2188000.ethernet eth1: Freescale FEC PHY driver (mii_bus:phy_addr=20b4000.ethernet:02, irq=-1)
IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready
done.
Starting system message bus: dbus.
Starting Dropbear SSH server: dropbear.
Starting rpcbind daemon...done.
Starting advanced power management daemon: No APM support in kernel
(failed.)
Starting syslogd/klogd: done
* Starting Avahi mDNS/DNS-SD Daemon: avahi-daemon
...done.
Starting Telephony daemon
Starting Linux NFC daemon
Running local boot scripts (/etc/rc.local).
Freescale i.MX Release Distro 4.1.15-2.0.0 fl-imx6ull /dev/ttymxc0
fl-imx6ull login: fec 20b4000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Freescale i.MX Release Distro 4.1.15-2.0.0 fl-imx6ull /dev/ttymxc0
fl-imx6ull login:
3. 在debug串口ifconfig信息如下。看起来可以发送数据，但不能接收数据。
fl-imx6ull login: root
-sh: /home/root: Is a directory
root@fl-imx6ull:~#
root@fl-imx6ull:~# ifconfig
eth0 Link encap:EthernetHWaddr 72:D9:B8:EB:67:45
inet addr:192.168.0.232Bcast:192.168.0.255Mask:255.255.255.0
inet6 addr: fe80::70d9:b8ff:feeb:6745%1995790032/64 Scope:Link
UP BROADCAST RUNNING MULTICASTMTU:1500Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B)TX bytes:5474 (5.3 KiB)
eth1 Link encap:EthernetHWaddr 1A:1C:48:2D:22:3B
inet addr:192.168.1.232Bcast:192.168.1.255Mask:255.255.255.0
UP BROADCAST MULTICASTMTU:1500Metric: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:1000
RX bytes:0 (0.0 B)TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1Mask:255.0.0.0
inet6 addr: ::1%1995790032/128 Scope:Host
UP LOOPBACK RUNNINGMTU:65536Metric: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@fl-imx6ull:~#
4. MX6UL-S核心板固件为出厂的，没做任何改动
5. CSI接口复用为了SDIO2接WIFI模块AP6181、复用SPI接了一颗芯片，按理应该对NET1网卡没有影响
麻烦看下上面NET1网卡不正常的原因，谢谢！
你说的ping不同，是怎么ping不通？ping不通局域网还是外网？
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