Bidirectional Mpls Te Tunnel - HP FlexNetwork 10500 Series Configuration Manual

Figure 30 RDM bandwidth constraints model
In MAM model, a BC constrains the bandwidth for only one CT. This ensures bandwidth
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isolation among CTs no matter whether preemption is used or not. Compared with RDM,
MAM is easier to configure. MAM is suitable for networks where traffic of each CT is stable
and no traffic bursts occur.
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Figure 31 MAM bandwidth constraints model
CT 2
CT 0
3. Verifies that the CT and the LSP setup/holding priority match an existing TE class.
An MPLS TE tunnel can be established for the CT only when the following conditions are met:
Every node along the tunnel has a TE class that matches the CT and the LSP setup priority.
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Every node along the tunnel has a TE class that matches the CT and the LSP holding
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priority.

Bidirectional MPLS TE tunnel

MPLS Transport Profile (MPLS-TP) uses bidirectional MPLS TE tunnels to implement 1:1 and 1+1
protection switching, and to support in-band detection tools and signaling protocols such as OAM
and PSC.
A bidirectional MPLS TE tunnel includes a pair of CRLSPs in opposite directions. It can be
established in the following modes:
•
Co-routed mode—Uses the extended RSVP-TE protocol to establish a bidirectional MPLS TE
tunnel. RSVP-TE uses a Path message to advertise the labels assigned by the upstream LSR
to the downstream LSR. RSVP-TE uses a Resv message to advertise the labels assigned by
the downstream LSR to the upstream LSR. During the delivery of the path message, a CRLSP
in one direction is established. During the delivery of the Resv message, a CRLSP in the other
CT 2 CT 2+CT 1 CT 2+CT 1+CT 0
BC 2
BC 1
BC 0=Max reservable BW
BC 0 is for CT 0. The bandwidth occupied by the traffic of CT 0 cannot exceed BC 0.
BC 1 is for CT 1. The bandwidth occupied by the traffic of CT 1 cannot exceed BC 1.
BC 2 is for CT 2. The bandwidth occupied by the traffic of CT 2 cannot exceed BC 2.
The total bandwidth occupied by CT 0, CT 1, and CT 2 cannot exceed the maximum
reservable bandwidth.
CT 0
BC 0
CT 1
BC 1
BC 2
CT 1 CT 2
Max reservable BW
Figure 31 shows an example:
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