netwyman

Route Target is one of the extensive community of BGP which is used in MPLS networks. Before understading and knowing about the what is the Route Target?, you have to know some basic concepts as VRF, RD which is generally used in MPLS network. VRF ( Virtual route forwarding ) we discussed earlier in the post, Now the important term to understand is RT ( Route Target ) Used with RD and VRF.  MPLS Route Target First of all we are going to know about why RT (Route Target) used in MPLS networks, RT ( Route Target ) comes into the scene when you have multiple remote sites which is connected to MPLS. So there are two concepts of RT as an Import and export. How and where to use Import and Export RT. as with any VRF, When you configure RT import, it imports all the prefixes that matches the configured RT value as one of the attribute in the BGP update. So in any-any VRF, it is common to see all PE configured with same RT value (You may see more RT depending on inter-VRF scenarios)...

What is MPLS? Multiprotocol Label Switching (MPLS) is data forwarding technology that increases the speed and controls the flow of network traffic. With MPLS, data is directed through a path via labels instead of requiring complex lookups in a routing table at every stop. MPLS Network Scalable and protocol independent, this technique works with Internet Protocol (IP) and Asynchronous Transport Mode (ATM). MPLS allows most data packets to be forwarded at Layer 2 -- the switching level -- of the Open Systems Interconnection (OSI) model, rather than having to be passed up to Layer 3 -- the routing level. For this reason, it is often informally described as operating at Layer 2.5 In an MPLS network, the first router to receive a packet determines the packet's entire route upfront, the identity of which is quickly conveyed to subsequent routers using a label in the packet header. While router hardware has improved exponentially since MPLS was first developed -- somewhat diminishi...