Alcatel-Lucent 7210 SAS M User Manual

MPLS and RSVP
7210 SAS M, T, X, R6, Mxp MPLS Configuration Guide Page 47
Figure 19: Failed Condition - Switching at Z
The unidirectional PSC protocol initiates protection switching: the selector bridge at node A is
switched to protection connection A-to-Z and the selector at node A switches to protection
connection Z to-A. The PSC packet, sent from node A to node Z, requests a protection switch to
node Z.
After node Z validates the priority of the protection switch request, the selector at node Z is
switched to protection connection A-to-Z and the selector bridge at the node Z is switched to
protection connection Z-to-A. The PSC packet, sent from node Z to node A, is used as
acknowledge, informing node A about the switching.
If BFD CC or CC/CV OAM packets are used to detect defects on the working and protection path,
they are inserted on both working and protection paths. It should be noted that they are sent
regardless of whether the selected as the currently active path.
The 7210 SAS supports the following operator commands:
• Forced Switch
• Manual Switch
•Clear
• Lockout of protection
Configuring MPLS-TP

Alcatel-Lucent 7210 SAS M Specifications

General

Brand	Alcatel-Lucent
Model	7210 SAS M
Category	Switch
Language	English