How is traffic engineering done in MPLS?

MPLS TE works by learning about the topology and resources available in a network. It then maps the traffic flows to a particular path based on the resources that the traffic flow requires and the available resources.

What is MPLS configuration?

MPLS Layer 3 VPNs allow a service provider to provision IP connectivity for multiple customers over a shared IP backbone, while maintaining complete logical separation of customer traffic and routing information.

How do I configure MPLS tunnel?

Configure the MPLS TE tunnel.

  1. Step 1: Globally Enable MPLS TE. The first step in the configuration of the head-end router is to globally enable MPLS TE.
  2. Step 2: Configure Interface Parameters.
  3. Step 3: Configure the Backbone IGP for MPLS TE.
  4. Step 4: Configure the MPLS TE Tunnel.

What is traffic engineering MPLS?

MPLS traffic engineering provides an integrated approach to traffic engineering. With MPLS, traffic engineering capabilities are integrated into Layer 3, which optimizes the routing of IP traffic, given the constraints imposed by backbone capacity and topology.

Which routing protocols support MPLS traffic engineering?

MPLS uses the reachability information provided by Layer 3 routing protocols and operates like a Layer 2 ATM network. With MPLS, TE capabilities are integrated into Layer 3, which can be implemented for efficient bandwidth utilization between routers in the SP network.

What are the types of MPLS?

There are three primary types of MPLS VPNs: Layer 2 VPNs, Layer 2 circuits, and Layer 3 VPNs.

What is tunnel in MPLS?

In a nutshell, MPLS tunnels allow traffic to transit over devices that have no knowledge of the traffic’s final destination, similar to how GRE tunnels and site-to-site IPsec VPN tunnels work. To accomplish this, MPLS tunnels use a combination of IGP learned information, BGP learned information, and MPLS labels.

What is the difference between MPLS and MPLS-TP?

MPLS-TP is a set of MPLS protocols that are being defined in IETF. It is a simplified version of MPLS for transport networks with some of the MPLS functions turned off, such as Penultimate Hop Popping (PHP), Label-Switched Paths (LSPs) merge, and Equal Cost Multi Path (ECMP).

What is RSVP and LDP?

2 commonly used terms in MPLS are LDP and RSVP-TE. While the former relates to easy provisioning in MPLS setup, the latter i.e. RSVP-TE is related to guarantee bandwidth for traffic communication. LDP setups LSPs based on routing data, whereas RSVP setups additional traffic engineered LSPs.

How to configure MPLS-TE for traffic engineering?

Use one of the following commands: Enters global configuration mode. Step 2 Enters MPLS-TE configuration mode. Enters MPLS-TE interface configuration mode and enables traffic engineering on a particular interface on the originating node. Specifies the IGP OSPF interface ID and area where the TE links are to be flooded.

What is the configuration of MPLS TE?

The final step in the configuration of MPLS TE is the configuration of the IGP for TE support. The IGP in use can be either OSPF or IS-IS. The IGP process used for TE is the same as what’s defined for NLRI reachability. The configurations involved for enabling TE extensions for both these protocols are outlined in Figure 9-17 .

How to configure MPLS Traffic-Eng tunnels in OSPF?

6. show mpls traffic-eng tunnels [tunnel-number] Step 1 Enters global configuration mode. Step 2 Configures an MPLS-TE tunnel interface. The range for the tunnel ID number is 0 to 65535. Step 3 Configures an explicit path option for an MPLS-TE tunnel. OSPF is limited to a single OSPF instance and area. Step 4 Repeat Step 3 as many times as needed.

How do I ignore overload in MPLS Traffic-Eng?

2. mpls traffic-eng 3. path-selection ignore overload 4. Use one of these commands: Step 1 Enters global configuration mode. Step 2 Enters MPLS-TE configuration mode. Step 3 Ignores the Intermediate System-to-Intermediate System (IS-IS) overload bit setting for MPLS-TE.