When starting a Juniper vMX router you may get a warning from the vMX.sh script that shows that the IOMMU status is disabled. It will look like this: This seems to occur if the host OS is CentOS – the shell script to detect the IOMMU does not validate this […]
Read moreWhen starting a Juniper vMX router you may get an error from the vMX.sh script that states “Insuffecient cores to pin” (note the incorrect spelling). The error looks like this: You may have over-assigned the number of CPU’s to the vFPC/vCP. Make sure that there is less CPU’s allocated to […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. When starting a Juniper vMX router you may get an error from the vMX.sh script that shows that the I40E drivers could not be checked. The error looks like this: The first thing to do […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. When deploying a Juniper vMX router on both a CentOS and Ubuntu host I ran into an issue when starting it. The symptoms were slightly different: For CentOS when the vMX started it would get […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. One of the new features for the vMX introduced in 17.4R1 is the virtual MS-MPC (known as the vMS-MPC). This allows you to run services such as NAT and stateful firewall on a virtual MX […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. The Juniper vMX product doesn’t include any init scripts or systemd unit files. You cannot also just set the VM’s to autostart with virsh since the VM’s are added and started with the vmx.sh shell […]
Read moreBy default, when you install a Juniper vMX device the physical interfaces will all be named “ge-0/0/*” and the output from show interface ge-0/0/X will show the speed as 1G. If you are using SR-IOV with 10G/100G NIC’s this can be a bit confusing. According to the Juniper docs this […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. If you will be creating GRE tunnels on a Juniper vMX device you will first need to enable the tunnel services. If you do not do this you will not have any GRE interfaces available […]
Read moreNOTE: I originally published this page in 2018; instructions may now be out of date. If you will be using IPSEC on a Juniper vMX router you will need to enable the adaptive services interface. This is not enabled by default. Once enabled the adaptive services interface will be present […]
Read moreThe Juniper vMX router for KVM includes a shell script to install and manage the vMX virtual machines. Here are the common commands you can use with the vmx.sh script: To do the initial installation of the vMX (this only needs to be done once, if you run it again […]
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