the modification is complete, the virtual machine will be started with an error: Invalid Ethernet address650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M02/9A/55/wKiom1lUexeBkE94AAAhxIg1zIw144.jpg "title=" Screenshot3896.jpg "alt=" Wkiom1luexebke94aaahxig1ziw144.jpg "/>You need to check if ethernetn.checkmacaddress = "false" is set, and whether the virtual network card type (Adapter type) is "Vmxnet3". If the E1000 type, you can remove and t
Tags: network device matching Virtual solution successful ETH solution span emptyingWorkaround:In the directory where the virtual machine is located, locate the *.vxm file and add a line at the end:" e1000 "This replicated virtual machine only provides a virtual hard disk. vmxd file, with no perfect match for your newly created *.VXM.Tried other methods on the Web, but none were successful, such as emptying the/etc/udev/rules.d/70-persistent-net.rules
Enter the/etc/sysconfig/network-scripts directory to see if there are any ifcfg-xxx files (except Ifcfg-lo),Nic device not found because the driver does not install properly due to VMware Virtual network card and Linux compatibility issues, the default NIC type is incompatibleWorkaround:Locate our VMware Virtual Machine folder, open the. vmx file, append a settingethernet0.virtualdev= "e1000"Once setup is complete, turn on the virtual machine and use
If the server has two fast network card can bind it to a virtual network card, if a network card is broken another piece can continue to work, increased redundancy and load, the specific practices are as follows:
Create a new virtual network card with the following command:
Iv/etc/sysconfig/network-scripts/ifcfg-bond0
Enter in the file:
Device=bond0Bootproto=staticipaddr=192.168.0.231netmask=255.255.255.0Onboot=yesType=ethernet
Exit after saving
Then modify Ifcfg-eth0 and ifcfg-eth1 two files
Vi
above shows that this example sets the anticipatory to the default I/O scheduler.2.1.9 Setting up Standard PCIThe next stage of the startup process initializes the I/O bus and the perimeter controller. The kernel detects PCI hardware by traversing the PCI bus, and then initializes other I/O subsystems. From Figure 2-3 We will see the SCSI subsystem, USB controller, video chip (part of 855 North Bridge chipset information), serial port (in this case, 8250 UART), PS/2 keyboard and mouse, floppy d
First, let's take a look at the diagram of a major multi-queue network card (E1000) with multi-core CPUs:
Non-multiple queues:
The Linux network card is represented by the structure body Net_device, one of which corresponds to a dispatch packet sending queue.
The entity of the packet is Sk_buff (SKB) in the kernel, in the form of:
Multiple queues:
A network adapter can have multiple queues
Next, look at how the TX engine Works (note: There are two
First step: Today 6 go to 7 find a problem not connected to the Internet
First, the most basic check to see if there is a virtual machine network, if the following image does not look down
Open Virtual Machine-"edit-" virtual network editor set it up.
See if the connection icon appears as shown in figure one after the above image is complete
Part Two: Click Edit Virtual Machine (virtual machine right-"settings)-Hardware-" Network adapter-"Click Nat Mode-" OK
Part III: Root Account
Rhel-4u2 network installation problems, help taste hero! -- Linux general technology-Linux technology and application information. For details, refer to the following section. Recently, due to work needs, we are conducting an experiment:
Install the redhat as 4 UP 2 Operating System on multiple servers through the network startup function (PXE.
The target servers are Lenovo Wanquan R510G6 and R520G6,
First, I built an installation platform:
DHCP server, TFTP server, and NFS server. The three
, the E100 specifies 16, e1000, and tg3 as 64. Generally, the faster the NIC, the larger the value can be specified.For non-napi drivers, all drivers share a 64-bit weight
Next let's take a look at how this value works.Non-napi DRIVER:First, for non-napi drivers, there is another parameter at work: netdev_max_backlog. This is a global variable that represents the maximum length of a non-napi-driven receiving queue. The default value is 1000, which can
started manually (dhclient/ifconfig)
Currently performance is much better when using a hostkernel configured with config_high_res_timers. Another option is usehpet/RTC and-clock = qemu option.
Expected performance
Performance varies from host to host, kernel to Kernel
On my laptop I measured 1.1 Gbps RX throughput using 2.6.23, 850 Mbps Tx.
Ping latency is 300-500 USEC
Method 2:The kernel version of a virtual machine created in virtio format is 2.6.32, which
Code
Text
Cause
Corrective action
N/
System name
A string consisting of 62 characters, which can be defined by the user in the system setup program.System name: • power on the system is displayed in the following cases.• Turn off the system power and display an active post error.
You can change the system string in the system setup program. See use the system setup program.
E1000
Failsafe, call support
virtual is cloned, an error will be reported when the network is started.
Solution:
A. Delete the NIC from the VM settings and start the VM.
B. Clear the/etc/udev/rules. d/70-persistent-net.rules file, move the ifcfg-eth0 configuration file to another location, close the Virtual Machine
B. Add a NIC to the VM settings to start the current VM.
C. Record the MAC address of the NIC in the/etc/udev/rules. d/70-persistent-net.rules File
~] # Vim/etc/udev/rules. d/70-persistent-net.rules
# PCI dev
3) 0.328 s-computing Calibrating Delay (total consumption of 4 CPU cores)
4) 0.144 s-calibration APIC clock
5) 0.312 s-calibration Migration Cost
6) 3.520 s-Intel E1000 Nic Initialization
Next, we will analyze and resolve the above parts one by one.
(3) Next, perform specific optimization.
CELF has already proposed a complete set of startup optimization solutions for Embedded Linux for consumer electronic products. However, due to different applicati
network interface for the virtual machine and add it to the specified VLAN;Model=type: Indicates the model number of the emulated NIC, Ne2k_pci,i82551,i82557b,i82559er,rtl8139,e1000,pcnet,virtioTo create a disk image file:Qemu-img create-f Qcow2-o perallocation=metadate,size=80g/vms/centos/centos.imgTo create a virtual network:Create a virtual network card, all paired up one on the virtual machine and the other on the bridge so you can communicate.IP
products such as ESX, such as Vmware Palyer, or even common VMware Workstation products, however, you can modify. the vmx configuration file achieves the same purpose,
Open the. vmx file and add
Ethernet0. VirtualDev = "vmxnet3"
Value is "vlance" or "e1000" or "vmxnet" or "vmxnet3"The network type and kernel driver of VMware are the same as those of Vbox. In the same Vbox configuration parameter. In the vmx file, you can use a series of parameters to
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