Diffserv-Aware Te - 3Com MSR 50 Series Configuration Manual

DiffServ-Aware TE

Link protection, where the PLR and the MP are connected through a direct link
■
and the primary LSP traverses this link. When the link fails, traffic is switched to
the bypass LSP. As shown in
→ Router C → Router D, and the bypass LSP is Router B → Router F → Router
C.
Figure 388 FRR link protection
Router A Router B
Primary LSP
Bypass LSP
Node protection, where the PLR and the MP are connected through a device
■
and the primary LSP traverses this device. When the device fails, traffic is
switched to the bypass LSP. As shown in
A → Router B → Router C → Router D → Router E, and the bypass LSP is
Router B → Router F → Router D. Router C is the protected device.
Figure 389 FRR node protection
PLR
Router A Router B
Primary LSP
Bypass LSP
Deploying FRR
When configuring the bypass LSP, make sure the protected link or node is not on
the bypass LSP.
As bypass LSPs are pre-established, FRR requires extra bandwidth. When network
bandwidth is insufficient, you are recommended to use FRR for crucial interfaces
or links only.
Diff-Serv 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 them to optimize network resources
allocation at a per-service class level. For traffic trunks which are distinguished by
class of service, this means varied bandwidth constraints.
388, the primary LSP is Router A →Router B
Figure
PLR MP
Router C
Router F
Figure
Router C
Router F
MPLS TE Overview
Router D
389, the primary LSP is Router
MP
Router D Router E
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