Monday, January 27, 2020

virtual machine host



virtual machine host


Starting in Junos OS Release 16.1, virtual machine hosts are maintained that not simply give extended control plane versatility and execution yet what's more give virtualization abilities to the Junos OS system. These virtualized Routing Engines, or virtual machine hosts, are the Routing Engines RE-MX-X6, RE-MX-X8, RE-PTX-X8, RE-QFX10002-60C.

It contains the going with parts:

  • The hardware layer 

  • The working system and hypervisor layer. 

  • The host utilities and Junos VM guest layer. 


The server at the hardware layer contains the physical framework interface cards (NICs), CPUs, memory, and Ethernet the board port. The NICs support hardware virtualization subject to single root I/O virtualization (SR-IOV). With SR-IOV, the physical NICs (known as a physical limits) are directed by the host, while the virtual limits are managed by the guest OS. Over the gear layer, a Linux-based OS outfits the host condition nearby the piece based virtual machine (KVM) and Quick Emulator (QEMU). This host OS manages the boot complex, CPU memory storing, and distinctive other hardware parts, for instance, the physical limits. Junos OS runs as guest OS, manages the virtual limits, and fills in as the administrative framework. Besides, it also gives the interface to managing the host and the hypervisor.

The additional applications and utilities running on the host OS help with giving the going with convenience:

  • Empowering correspondence between have OS and guest OS. 

  • Initiating legitimate execution of the host OS subject to the bearing and arrangement on the guest Junos OS. 

  • Loosening up the VM the board value to give features, for instance, autorecovery.

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