最近在调试lan8720+imx6ull双网卡,核心板使用的是正点原子的,方案也是参考其的。 调试了几天发现了一个问题就是eth1和eth0网卡经常掉线,情况就是出现(图1) fec 2188000.ethernet eth1: Link is Up - 100Mbps/Full - flow control rx/tx fec 2188000.ethernet eth1:Link is down... ...
dts重新编译设备树，启动内核不再提示 fec 20b4000.ethernet eth0: Link is Down，问题基本确认出在dts...
完晕 你是不是用的线不对啊！ 路由器和路由器之间用交叉线啊，你和交换机插能亮就说明 这根线肯定是直通线 直通线接两台路由器 怎么能通呢？
An Ethernet interface is physically Down. Troubleshooting Procedure Check whether the devices are powered on, and the interface modules and the link between the interfaces work properly. If the two devices are connected by a twisted pair, check the following items. Item Expected Result Follow-up...
If the MCPWM is configured and started (pwm_init() called) the ethernet stops working. Events are not generated. If the MCPWM does not configured (pwm_init() does not called) the ethernet works properly. I have issues ethernet + SPI as well but I could not strip down the closed source...
[AR1-Cellular1/0/0] apn-profile 5gprofile Info: The configuration will become effective after link reset. [AR1-Cellular1/0/0] shutdown [AR1-Cellular1/0/0] undo shutdown [AR1-Cellular1/0/0] quit 配置Ethernet over GRE,创建VE接口。 创建分支的二层VE接口VE0/0/1和VE0/0/2。 [AR1...
GigabitEthernet1/0/51 is down, line protocol is down (notconnect) Hardware is Gigabit Ethernet, address is 003c.1093.f533 (bia 003c.1093.f533) Description: SW-02 UPlink to SW-01 MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec, ...
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/47, changed state to down Jul 22 12:11:14: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/47, changed state to down Jul 22 12:11:18: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/47, changed state to up Jul 22 12...
LINK_DOWN_CHANGE When this message is displayed, the link is down. To investigate the issue, click the Link Speed tab and run diagnostics. LINK_DUPLEX_MISMATCH This message signifies a mismatch in duplex between the adapter and the link partner. To investigate this issue, click the Link Speed...
//addState(mObtainingLinkState, mRootState); addState(mObtainingIpState, mRootState); addState(mIPConnectedState, mRootState); addState(mDisconnectingState, mRootState); 1. 2. 3. 4. 5. 6. 接着前面说到的INTERFACE_STATE_CHANGED_ACTION广播继续来看下状态机中的逻辑。 在ethernetstatemachine中, ...