Samsung Ubigate iBG2016, Руководство по настройке

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CHAPTER 9. MPLS
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QoS
MPLS EXP bit based QoS behavior will be implemented in the Ubigate
product. With this an MPLS EXP table will be defined. This table provides
DSCP to EXP bit mapping in the ingress scenario, as well as rewriting of EXP
bit in the transit scenario(EXP to EXP mapping), if desired.
The user will statically provision this table:
The Class Map, which identifies the class of traffic parameter to map
The EXP bit to map based on this class, and the traffic parameter, for either
traffic policing or for traffic shaping.
Martini L2 VPN Overview
An L2 VPN leverages the MPLS tunneling capability to extend a Layer-2
network and allows bridging of remote subnet with Virtual Circuits(VCs).
A Virtual Circuit is a pair of LSPs in opposite directions allowing bidirectional
traffic. That is, a VC is a bidirectional virtual link that bridges remote subnet.
Figure 9.2 Martini L2 VPN Configuration
Since MPLS LSP is uni-directional by nature, a VC is composed of two MPLS
LSPs in opposite directions. The LSPs can be established using either LDP or
RSVP signaling protocol. The ingress and egress nodes of the tunnel use
extension to the LDP to exchange VC labels and to create a virtual circuit.
LDP1 LDP2
L2 Interface
CE1
VC Lable Exchang
PE1
PW Interface
PSN Interface
Provider
Provider
PE2
Bidirectional
Vitual Circuit
CE2