See Bandwidth License Useage in Juniper vMX


Juniper vMX features are managed via a software license. There are three levels of licensing along with the overall bandwidth license. Also, licenses are additive; if you add more than one license to a vMX router then it will add all of the licenses together. This is a great way to manage to growth as you continue to expand the usage of your vMX router.

The following shows you how to verify the software licenses installed and the total bandwidth of the vMX router.


Determine the bandwidth license usage in Juniper vMX and configured bandwidth in the packet forwarding engine (PFE).

Components used

  1. VMWare ESXi 6.0 Update 2
  2. Juniper vMX 16.1R7

These instructions also work with vMX deployed on KVM or other virtualization platforms. The commands are only dependant on junos.

Verify Commands

The “show system license” command displays the licenses installed and their current usage. In the example below the system has two license for a total of 100 mb of bandwidth.

 show system license   
show system license example output:

Use the “show pfe statistics traffic bandwidth” to show the actual bandwidth being used. This shows the configured bandwidth based off of the licenses along with the current and average bandwidth being used.

show pfe statistics traffic bandwidth
show pfe statistics traffic bandwidth output:


If you combine the same command with the pipe command , the “refresh” command and a value in seconds,  then you can set up a nice little bandwidth monitor. This is very handy if you are troubleshooting and you think you’re out of bandwidth, licensing has kicked in, and you’re seeing some impact to traffic outside normal troubleshooting.

show pfe statistics traffic bandwidth | refresh 1
show pfe statistics traffic bandwidth | refresh 1 output:


I hope these commands help you out!

Cisco ASA to Juniper SRX Migration

Below is an excellent resource for engineers who are already familiar with Cisco ASA firewalls and want a no nonsense guide to covert over to Juniper’s SRX next generation firewall. Rather than go over security concepts you’re already familiar with it mainly goes over the common things that people need to migrate. It also does an excellent job of highlighting some of the architectural differences between the two platforms.

Cisco ASA to Juniper SRX Migration Book