Cisco Cisco Prime Optical 10.6 Developer's Guide
Cisco Prime Optical 10.6 GateWay/CORBA Programmer Reference Guide
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Figure 4-4: MPLS-TP Tunnel
For descriptions of MPLS-TP Tunnel provisioning and inventory interfaces, see the following sections:
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4.1.9 MPLS-TP LSP
The LSP circuit provides the TP tunnel circuit with the path used for routing traffic. It also provides the
distribution of labels along the defined route. Both TP tunnels and LSP subnetwork connections (SNCs)
have the following attributes in common:
distribution of labels along the defined route. Both TP tunnels and LSP subnetwork connections (SNCs)
have the following attributes in common:
• Layer rate—LR_MPLS (165)
• Name
• Service ID
• Name
• Service ID
The information that discriminates the LSP from the TP tunnel is the Unique ID number, which serves
also to distinguish one LSP from another in the case of a protected TP tunnel. Before you create the
second LSP in a protected TP tunnel, you must wait until the TP tunnel and the first LSP are discovered.
This is necessary in order to exclude the links used by the first LSP.
For descriptions of MPLS-TP LSP provisioning and inventory interfaces, see the following sections:
also to distinguish one LSP from another in the case of a protected TP tunnel. Before you create the
second LSP in a protected TP tunnel, you must wait until the TP tunnel and the first LSP are discovered.
This is necessary in order to exclude the links used by the first LSP.
For descriptions of MPLS-TP LSP provisioning and inventory interfaces, see the following sections:
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4.1.10 Pseudowire
A pseudowire (PW) is an emulation of a Layer 2 point-to-point, connection-oriented service over a
packet-switching network (PSN). Pseudowire is the technique used to transport these types of frames. It is
the emulation of a native service over the MPLS network.
LDP, MPLS-TE, and MPLS-TP are the basement for the pseudowire technology used to transport any
kind of payload over a structured network (AToM). Currently, MPLS-TP has only one client network
layer, which is pseudowire. The only way to route traffic into an MPLS-TP tunnel is to configure it as the
preferred path of a pseudowire.
The kinds of pseudowire are:
packet-switching network (PSN). Pseudowire is the technique used to transport these types of frames. It is
the emulation of a native service over the MPLS network.
LDP, MPLS-TE, and MPLS-TP are the basement for the pseudowire technology used to transport any
kind of payload over a structured network (AToM). Currently, MPLS-TP has only one client network
layer, which is pseudowire. The only way to route traffic into an MPLS-TP tunnel is to configure it as the
preferred path of a pseudowire.
The kinds of pseudowire are:
• Interface based
• EVC based
• EVC based