Cisco Cisco Prime Optical 9.6 Developer's Guide
Cisco Prime Optical 9.6.3 GateWay/CORBA Programmer Reference Guide
OL-28047-01
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4.1.8 MPLS-TP Tunnel
The MPLS-TP entity is characterized as follows:
• Has two endpoints.
• Has two endpoints.
• Has one or two bidirectional Label Switched Path (LSP) pairs between the endpoints. If
there are two pairs, then one is the working path and the second is the protected path.
• The bidirectional LSPs in a pair are congruent. Bidirectional LSPs follow the same path in
both directions.
• The tunnel can be configured with bandwidth. However, unlike MPLS-TE, there is no
bandwidth reservation or preemption on the NE. Use the show command to view the
configured bandwidth. Any bandwidth reservation must be handled within the NMS.
• Bidirectional Forwarding Detection (BFD) can be configured to monitor any of the
bidirectional LSP pairs.
• MPLS-TP tunnel is used to carry pseudowires. Pseudowires or PW segments are explicitly
configured to use a particular MPLS-TP tunnel using a given PW-CLASS configuration.
Figure 4-4 shows a typical MPLS-TP Tunnel.
Figure 4-4: MPLS-TP Tunnel
For descriptions of MPLS-TP Tunnel provisioning and inventory interfaces, see the following
sections:
•
•
•
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:
• Layer rate—LR_MPLS (165)
• Layer rate—LR_MPLS (165)