Diffserv-Aware Te - HP MSR2000 Configuration Manual

Protection modes
FRR provides the following protection modes:
• Link protection—The PLR and the MP are connected through a direct link and the primary CRLSP
traverses this link. When the link fails, traffic is switched to the bypass tunnel. As shown in
the primary CRLSP is Router A—Router B—Router C—Router D, and the bypass tunnel is Router
B—Router F—Router C. This mode is also called next-hop (NHOP) protection.
Node protection—The PLR and the MP are connected through a device and the primary CRLSP
•
traverses this device. When the device fails, traffic is switched to the bypass tunnel. As shown
in Figure
bypass tunnel is Router B—Router F—Router D. Router C is the protected device. This mode is also
called next-next-hop (NNHOP) protection.

DiffServ-aware TE

DiffServ is a model that provides differentiated QoS guarantees based on class of service. MPLS TE is a
traffic engineering solution that focuses on optimizing network resources allocation.
DiffServ-aware TE (DS-TE) combines DiffServ and TE to optimize network resources allocation on a
per-service class basis. DS-TE defines different bandwidth constraints for class types. It maps each traffic
class type to the CRLSP that is constraint-compliant for the class type.
The device supports these DS-TE modes:
Prestandard mode—HP proprietary DS-TE.
•
IETF mode—Complies with RFC 4124, RFC 4125, and RFC 4127.
•
Figure 23 FRR link protection
24, the primary CRLSP is Router A—Router B—Router C—Router D—Router E, and the
Figure 24 FRR node protection
60
Figure 23,