Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


Configuring MPLS on EX8200 and EX4500 Provider Switches

You can configure MPLS on EX8200 and EX4500 switches to increase transport efficiency in your network. MPLS services can be used to connect various sites to a backbone network and to ensure better performance for low-latency applications such as VoIP and other business-critical functions.

To implement MPLS on EX Series switches, you must configure at least one provider switch as a transit switch for the MPLS packets. The configuration of all the provider switches remains the same regardless of whether the provider edge (PE) switches are using circuit cross-connect (CCC) or using MPLS over IP for the customer edge interfaces. Likewise, you do not need to change the configuration of the provider switches if you implement an MPLS-based Layer 2 VPN, Layer 3 VPN, or a Layer 2 circuit configuration.

MPLS requires the configuration of a routing protocol (OSPF or IS-IS) on the core interfaces and the loopback interface of all the switches. This procedure includes the configuration of OSPF on the provider switch. For information on configuring IS-IS as the routing protocol, see Junos OS Routing Protocols Configuration Guide.

To configure the provider switch, complete the following tasks:

  1. Enable the routing protocol (OSPF or IS-IS) on the loopback interface and on the core interfaces:

    You can use the switch address as an alternative to the loopback interface.

  2. Enable traffic engineering for the routing protocol (traffic engineering must be explicitly enabled for OSPF):
  3. Enable MPLS within the protocols stanza and apply it to the core interfaces:
  4. Configure RSVP on the loopback interface and the core interfaces:
  5. Configure an IP address for the loopback interface and for the core interfaces:
  6. Configure family mpls on the logical units of the core interfaces:

    You can enable family mpls on either individual interfaces or aggregated Ethernet interfaces. You cannot enable it on tagged VLAN interfaces.