Multiprotocol Label Switching - MPLS IP Forwarding: Data Plane - Overview of MPLS Unicast IP Forwarding

5 important questions on Multiprotocol Label Switching - MPLS IP Forwarding: Data Plane - Overview of MPLS Unicast IP Forwarding

What actions are performed by Label Switch Router (LSR)? 3

-router that push labels
-router that pops/removes labels
-forward labeled packets

What actions are performed by Edge LSR (E-LSR)? 2

-LSR at edge of MPLS network
-router processes labeled and unlabeled packets

What actions are performed by Ingress E-LSR?

Router recieves an unlabeled packets and inserts a label stack in front of the IP header
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What actions are performed by Egress E-LSR?

Router recieves an labeled packet and removes all MPLS labels, forwarding an unlabeled packet

What actions are performed by ATM-LSR?

LSR that runs MPLS protocols in the control plane to set up ATM virtual circuits. Forward packets labeled packets as ATM Cells.

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