Label Switching Router


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Label Switching Router

(networking)
(LSR) A device that typically resides somewhere in the middle of a network and is capable of forwarding datagrams by label switching. In many cases, especially early versions of MPLS networks, a LSR will typically be a modified ATM switch that forwards datagrams based upon a label in the VPI/VCI field.
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Label switching router (LSR) is a fundamental component on an MPLS network.
In the MPLS network, internal routers that perform swapping and label-based packet forwarding are called Label Switching Routers (LSRs).
The topology includes 4 Label Edge Routers (LERs), 6 Label Switching Routers (LSRs), 4 traffic generating clients and 4 servers.