MPLS Configuration Overview

When you first install JUNOS Software on your device, MPLS is disabled by default. You must explicitly configure your device to allow MPLS traffic to pass through. Complete the following steps for all devices in your MPLS network that are running JUNOS software.

To enable MPLS:

1. Delete all configured security services from the device. If you do not complete this step, you will get a commit failure.
2. Enable MPLS on the device.
3. Commit the configuration.
4. Reboot the device.

Caution: When MPLS is enabled, all flow-based security features are deactivated and the device performs packet-based processing. Flow-based services such as security policies, zones, NAT, ALGs, chassis clustering, screens, firewall authentication, and IPSec VPNs are unavailable on the router.