MPLS in large enterprise networks forwards data packets using Core Router Aggregate Router Edge Router ATM Switch
MPLS in large enterprise networks forwards data packets using
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Core Router |
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Aggregate Router |
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Edge Router |
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ATM Switch |
What is MPLS
- Multi-protocol label switching (MPLS), is tried and true networking technology has powered enterprise networks for over two decades.
- Unlike other network protocols that route traffic based on source a destination address, MPLS routes traffic based on predetermined “lables”.
- Businesses have used MPLS to connect remote branch offices that require access to data or applications that reside in the organizations data center or company headquarters.
End user sends traffic into the MPLS network, an MPLS label is added by an ingress MPLS router that sits on the network edge. The MPLS Label consists of four sub-parts:
The Label: The label holds all of the information for MPLS routers to determine where the packet should be forwarded.
Experimental: Experimental bits are used for Quality of Service (QoS) to set the priority that the labeled packet should have.
Bottom-of-Stack: The Bottom-of-Stack tells MPLS routers if they are the last leg of the journey and there are no more labels to be concerned with. This usually means the router is an egress router.
Time-To-Live: This identifies how many hops the packet can make before it is discarded.
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