i have create a etherchannel between a cisco switch and OVS device. it is work fine. i was wondering how can i monitor OVS bondign status. like, which physical link is down, how traffic is populate on port, is etherchannel up or down. these status is available on cisco "show etherchannel summary" command.
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Trying to ping from target to Test PC ( windows having Virtual Linux Machine)
Ping works smoothly when:
1. VM ubuntu is not turned off
or
2. Wireshark is not capturing LAN where actual connect is made
This is applicable for IP4 and IP6 ping.
Here VM is configured for Bridged network (same LAN configured in VM)
If I disable LAN ( bridged n/w), then ping works from target
Wireshark if capture lets say WLAN, then ping works from target
I had a suspect on the gateway, subnet but the same setup work in absence of VM + Wireshark
Above things shows if same NIC is used by additional utilities e.g. Wireshark or VM, there are certain communication problem causing ARP or NDP to fail.
I have heard of such congestion failure.
Now I wish to know is this specific behavior of PC, PC configuration (e.g. regedit) or something wrong from the target.
Target is a linux based system.
Error mesaage:
icmp_seq=1 Destination unreachable: Address unreachable
Try to play with 'promiscous mode' on network card at machine where wireshark is running.
I develop on my tablet using android studio.
The tablet is connected to the computer by wifi using
adb connect <ip_andress>:5555
My application contains listeners for USB devices attached/detached.
But unfourtunately, when I connect/disconnect usb device to/from the tablet, the adb connection is getting killed, and I can no longer see the device under "adb devices".
It is not a adb-connection-by-wifi what gets killed. It is just that USB enumerations affect the sys.usb.* system properties which on many devices is causing restart of adbd regardless whether it's being used over USB or tcpip.
Do grep "stop adbd" /init*rc to see what I mean.
You could either comment out those stop adbd lines or just disconnect the USB cable before running your adb connect command.
I was never able to connect my cellphone with my computar through wi-fi.
I had already given up. I followed all the instructions and tips, and nothing worked.
Finally, I did what no one said to do.
I've connected the phone to the WiFi network provided by the cable modem itself and not to some (not all) additional networks that are included in the router.
At home I use one of these networks, because I use a Deco Tp-Link router, which propagates the signal to my entire house, but this network is NOT compatible with ADB. It does not identify it as belonging to the same network.
After this, I use the normal procedure described here.
a) Connect cellphone with a USB cable
b) Find the IP_Phone depends on system in the cell phone. Here I use Settings, About Phone, Status and IP address.
c) Run the following adb commands in Command Prompt (Windows) or Terminal (Linux), where IP_Phone is the IP above mentioned. Normally adb.exe is an executable stored in computer path. adb is already included in Android Studio package.
adb tcpip 5555
adb connect IP_Phone
d) Now disconnect USB cable and it's ready. The cellphone model continues to appear in the status line in the top of Android Studio.
-/-
The best wifi is that defined in Cable Modem. It, unlike an any account defined in my router, answers to a ping command.
ping IP_Phone
Disconnect the usb cable just before running adb connect <*ip_address_of_your_phone*>
I've created a virtualbox via docker-machine:
$ docker-machine create --driver virtualbox default
Within the Guest-OS I'd like to access my USB-Serial device, which is a Nordic nRF52840 DevKit, which is listed in macos as /dev/tty.usbmodem144241.
However, this device is not listed as USB device by virtualbox. I've also tried adding the devices as a Serial Port with the Port Mode "Host-Device" as described in this link, but without any success:
If I add the Serial Port as .tty-usbmodem the virtualbox will hang in 'Starting', I have to kill all virtualbox processes or disconnect the serial cable in order to start again. If I use .cu-usbmodem the virtualbox starts up but immediately crashes.
I'm running out of ideas here. I'm stuck at this issues since docker for mac does not support the --devices mapping without virtual machine, and for the virtual machine I somehow can't manage to add the port.
Any ideas on what else I could try?
So as it turns out virtualbox is quite picky about when a device is actually connected and does not work as seamlessly as I'm used from using VMWare:
The device I was using really just shows up as SEGGER J-Link in the USB menu
It must be added as filter (filter is really confusing > first I thought it would ignore the device)
The device cannot be added to the virtualbox 'on the fly' (using the USB-icon in the 'Show' window, see screenshot), it must not be connected before the virtualbox starts up.
The serial-tab is irrelevant > it's all handled via the USB tab.
The important fact is that the device must not be connected wenn the virtualbox fires up. So the steps to add a device are the following:
Power down the virtualbox
Make sure the USB controller is enabled
Connect the USB/serial device to the computer (host)
Add it to the filter in the virtual box
Now every time you want to use the device with the virtualbox:
Make sure the virtualbox is down (e.g. docker-machine stop default)
Disconnect the USB/serial device from the computer
Start up the virtualbox (e.g., docker-machine start default)
Virtualbox should now be able to "intercept" the device and list it under /dev, e.g., as /dev/ttyACM0
Un-/Plugging a filtered device once the box is up also works (you don't have to power down the virtualbox again if you forgot to disconnect the device before starting it up. Just wait for the box to be up, unplug, plug in, should be good).
I am building a sample vagrant box to install Jenkins and push it to atlas cloud.Please find below the steps that I followed.
Vagrant init ubuntu/trusty64
and the normal command to initialize the vagrant machine.
vagrant up
After this if i type command to ssh into the machine
vagrant ssh
It gives me error saying please increase timeout and so.
The main question is how can I ssh into the newly created vagrant machine.
To understand this, I have to go through all the basics. Please find below my findings.
Not attached
In this mode, VirtualBox reports to the guest that a network card is present, but that there is no connection -- as if no
Ethernet cable was plugged into the card. This way it is possible to "pull" the virtual Ethernet cable and disrupt the connection, which can be useful to inform a guest operating system that no network connection is available and enforce a reconfiguration.
Network Address Translation (NAT)
If all you want is to browse the Web, download files and view e-mail inside the guest, then this
default mode should be sufficient for you, and you can safely skip the rest of this section. Please note that there are certain limitations when using Windows file sharing (see Section 6.3.3, “NAT limitations” for details).
NAT Network
The NAT network is a new NAT flavour introduced in VirtualBox latest versions.
Bridged networking
This is for more advanced networking needs such as network simulations and running servers
in a guest. When enabled, VirtualBox connects to one of your installed network cards and exchanges network packets directly, circumventing your host operating system's network stack.
Internal networking
This can be used to create a different kind of software-based network which is visible to selected virtual machines, but not to applications running on the host or to the outside world.
Host-only networking
This can be used to create a network containing the host and a set of virtual machines, without the need for the host's physical network interface. Instead, a virtual network interface (similar to a loopback interface) is created on the host, providing connectivity among virtual machines and the host.
Generic networking
Rarely used modes share the same generic network interface, by allowing the user to select a driver which can be included with VirtualBox or be distributed in an extension pack.
At the moment there are potentially two available sub-modes:
UDP Tunnel
This can be used to interconnect virtual machines running on different hosts directly, easily and transparently, over existing network infrastructure.
VDE (Virtual Distributed Ethernet) networking
This option can be used to connect to a Virtual Distributed Ethernet switch on a Linux or a FreeBSD host. At the moment this needs compiling VirtualBox from sources, as the Oracle packages do not include it.
Out of these, only NAT and Host-only network is important.So, to solve this issue, I modified the predefined Vagrant file with the following code.
jenkins.vm.provider "virtualbox" do |vb|
jenkins.vm.network "private_network",ip:'192.168.56.5',:adapter => 2
jenkins.vm.hostname = 'jenkins.ci'
vb.name = "Jenkins"
end
Here, I have created a private network with static Ip and also, I specified the adapters count to use 2. The Private adapter is Host-only adapter and 1st adapter which is default one is NAT.
I have VMware workstation 9 and 10, and I am wanting to use that to run some integration tests.
Using the vmrun utility, I can copy scripts to and run them on the virtual machine guests. However, some of the integration tests will require interfacing with USB devices.
Is there any way using vmrun, or any of the vmware API's to programmatically control the "Removable Devices" to connect and disconnect USB devices to virtual machines?
I have tried looking at the readVariable and writeVariable commands, however I cannot find any useful information on that subject.
vmrun has no facility to passthrough USB devices from the host to the guest and vice versa (source, VMware employee). There are though 2 options to achieve this behavir
A) Use autoconnect: look here and here on how to modify the .VMX file to auto connect the USB device to the guest VM. Basically you need to add usb.autoConnect.device0 = "vid:XXXX pid:XXXX" to it.
B) Use askConnection: When you plugged in the device to the host, and the VM is powered on, you can select to connect the device to the VM and remember the choice. Then the next time when you pluggin the device again, the device will be automatically connected to the remembered VM. Also, you can configure in Edit > Preferences > USB for other choices. Currently, this feature only works when you plug in the device.