R2511-HP MSR Router Series MPLS Configuration Guide(V5)

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• The total bandwidth occupied by CT 0, CT 1, and CT 2 cannot exceed the maximum reservable
bandwidth.
Figure 89 MAM bandwidth constraints model
3. Checks whether the traffic trunk matches an existing TE class.
The device checks whether the CT and the LSP setup/holding priority of the traffic trunk matches an
existing TE class. An MPLS TE tunnel can be established for the traffic trunk only when the following
conditions are met:
{ Every node along the tunnel has a TE class that matches the traffic trunk's CT and the LSP setup
priority.
{ Every node along the tunnel has a TE class that matches the traffic trunk's CT and the LSP
holding priority.
NOTE:
The prestandard mode does not allow you to configure TE classes. The IETF mode allows for TE class
configuration.
MPLS LDP over MPLS TE
As shown in Figure 90, in layered networks, MPLS TE is usually deployed only in the core layer, and
MPLS networks in the distribution layer usually use LDP as the label distribution signaling. To set up an
LDP LSP tunnel across the core layer, you must establish a local LDP session between each pair of
neighboring LSRs in the core layer.
Figure 90 Establishing an LDP LSP across the network core layer