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Category: MX/vMX

Posted December 18, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Ubuntu 16.04 KVM Host Setup

NOTE: I originally published this page in 2018; instructions may now be out of date. While looking at the Juniper vMX documents recently, I noticed that support has now been added for Ubuntu 16.04 with kernel 4.4.0-62-generic (see Table 2). Since I personally prefer using Debian over RHEL systems, I […]

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Posted December 18, 2018April 17, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – i40e Module Upgrade

NOTE: I originally published this page in 2018; instructions may now be out of date. Juniper has provided an updated copy of the i40e module to resolve the “PF reset” issues that occur on vMX routers when using SR-IOV. The new driver release is version 2.4.101. IMPORTANT: At the time […]

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Posted December 5, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Dual Routing Engine Setup

NOTE: I originally published this page in 2018; instructions may now be out of date. Recent releases of the Juniper vMX (18.1 onwards) support dual routing engines when using KVM as the virtualisation technology. One or both of the routing engines do not need to be configured on the same […]

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Posted December 4, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Error: Unsupported machine type

When attempting to install a Juniper vMX router (release 18.3R1-S1.4) on a newly installed Centos 7.2 host I got the following error: When I checked the supported machine types with /usr/libexec/qemu-kvm -machine help everything looked fine, pc-i440fx-rhel7.0.0 was listed as the default: The error gmem.c:489: custom memory allocation vtable not […]

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Posted October 29, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Intel SR-IOV Crashing

UPDATE: A new copy of the i40e driver has been provided by Juniper (unofficially). You can try this at your own risk, see here for details. When using a Juniper vMX with a Intel X520 or Intel X710 based card and SR-IOV, under load the vFPC may crash. This seems […]

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Posted October 18, 2018April 17, 20212 CommentsPosted in MX/vMXMX/vMX

Juniper MX – Rebooting a MS-MIC-16G

I experienced a strange issue after making some configuration changes to a Juniper MX104 device with a MS-MIC-16G installed. After removing some NAT rules the services interface that the NAT service was attached to started doing a large amount of traffic. The same change was made on a second router […]

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Posted May 9, 2018April 17, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – IPv6 Support for Host Bridge Interface

After I have deployed the vMX on a CentOS 7.4 host that has an IPv6 address for management, I noticed that IPv6 stopped working when the vMX was started. In my case, the IPv6 address was originally on the interface bond0. When the vMX starts a bridge interface is created […]

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Posted March 29, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Error: setlocale: No such file or directory

When starting a Juniper vMX router you may get an error from the vMX.sh script that shows that the libvirt files could not be generated followed by “setlocale: No such file or directory” one or more times. The error looks like this: Ensure that both the hosts’s locale and your […]

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Posted March 29, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Error: Intel IOMMU status Disabled

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 […]

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Posted March 29, 2018April 15, 2021Leave a commentPosted in MX/vMXMX/vMX

Juniper vMX – Error: Insuffecient cores to pin

When 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 […]

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