请问，M2刷了FA的debian系统后，在千兆网络上，网络不稳定。是什么原因？ 比如我ssh到M2上，过个几十秒，ssh就卡主了。同时，我能看到我cisco 3560G千兆交换机上对应的端口，在橙绿色交替闪烁。
我把交换机端口强制为100M -FULL 就没这问题了。
出现故障时，我通过串口看到的网卡信息如下：
NanoPi2:sbin# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 7
Transceiver: external
Auto-negotiation: on
Supports Wake-on: ug
Wake-on: d
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: yes
NanoPi2:sbin# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 06:2f:e6:2a:bd:b1
inet addr:10.117.0.12 Bcast:10.117.0.255 Mask:255.255.255.0
inet6 addr: fd74:b3ee:e431:0:42f:e6ff:fe2a:bdb1/64 Scope:Global
inet6 addr: fe80::42f:e6ff:fe2a:bdb1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2609 errors:0 dropped:495 overruns:0 frame:0
TX packets:512 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:314446 (307.0 KiB) TX bytes:85087 (83.0 KiB)
Interrupt:48
从上面的网卡信息来看，有在DROP报文，请告知如何解决。
ps: 以上问题不可能是我的网线问题。
