MPLS Configuration Overview

When you first install Junos OS 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 OS.

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. See Example: Deleting Security Services
2. Enable MPLS on the device. See Example: Enabling MPLS
3. Commit the configuration.
4. Reboot the device.

5. Configure MPLS features such as traffic engineering, VPNs, and VPLS. See:

   • MPLS Traffic Engineering and Signaling Protocols Overview
   • MPLS VPN Overview
   • CLNS Overview
   • VPLS Overview

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.

Related Topics

• Junos OS Feature Support Reference for SRX Series and J Series Devices
• MPLS Overview
• Example: Deleting Security Services
• Example: Enabling MPLS
• Junos MPLS Applications Configuration Guide
• Junos VPNs Configuration Guide