Mpls Forwarding; Figure 18.1 L2Vpn For Mpls - Samsung Ubigate iBG3026 Configuration Manual

CHAPTER 18. MPLS
The end nodes don't see this
DA SA 0x8847 1076 2055 DA SA Etype Payload
They see this
L2VPNs allow the IP addresses of the end-to-end devices to remain private.

MPLS Forwarding

MPLS forwarding consists of 3 main operations:
1.
Mapping of data packets into LSPs based on destination FEC bypushing
MPLS labels. For Martini case, a VC label followed by a tunnel label
will be pushed.
2.
Switching of MPLS labeled packets by swapping the incoming MPLS
labels with pre-agreed outgoing label.
3.
Forwarding of MPLS packet as L3 packets by popping the MPLS label
at the PHP HOP or at the egress LER. For Martini case, forwarding of
MPLS packet as L2 packets by popping the MPLS outer label, and
examine the inner VC label.
142
LER
DA SA Etype Payload
LSR
192.168.1.54/24
192.168.1.54/24

Figure 18.1 L2VPN for MPLS

LSP1
DA SA 0x8847 1094 2055 DA SA Etype Payload
LSR
LSR
DA SA Etype Payload
192.168.1.108/24
LER
DA SA Etype Payload
192.168.1.108/24
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