What we are going to see in this section:
- How does MPLS work?
- Traditional IP routing
- Basic MPLS feature
- MPLS terminology
2.What is MPLS Label distributing protocol (LDP) ? How LDP works?
3.how to configure MPLS LDP Peering ?
4.What is MPLS L3 VPN ? How to configure?
5.How to configure MPLS L3 VPN with RIPv2 ?
6.How to configure MPLS L3 VPN with EIGRP ?
7.How to configure MPLS L3 VPN with OSPF ?
8.What is OSPF Sham Links? how to configure OSPF Sham Links?
10.What Is Network Tunneling And How To Configure Generic Routing Encapsulation (GRE) Tunnels?
11. What Is DMVPN (Dynamic Multipoint VPN), NHRP, MGRE And How To Configure DMVPN Phase 1?
15. What Is IPSec (Internet Protocol Security)? What Is Internet Key Exchange IKE? How To Configure IPSec Tunnel?
16. What Is IKE (Internet Key Exchange)? How To Configure IPSec Site-To-Site?
Let’s take an example to understand better.
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MPLS Packet Forwarding host 10.1.1.1 generates and sends an unlabeled packet destined to host 20.1.1.1. |
- router 1, with no MPLS feature configured, forwards the unlabeled packet based on the destination IP address, and traditional IP routing, without any labels.
- MPLS router e receives the unlabeled packet and decides, as part of the MPLS forwarding process to impose(push) a new label (value 20) into the packet and forwards the packet to router 3.
- MPLS router 3 revives the labeled packet. router 3 swaps the label for a new label value (30) and then forward the packet to router 4.
- MPLS router receives the labeled packet, removes (pops) the label, and forwards the packet toward router 5
- non-MPLS router 5 forwards the unlabeled packet based on the destination IP address, as normal.
Traditional IP routing
- Packet header
- Local routing table
Basic MPLS features
MPLS terminology
A sequence of labels to reach a destination is called an lSP.
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