The PCE can obtain topology and traffic-engineering information from the network using either a link-state IGP or BGP-LS.

A stateful PCE proactively monitors all the existing LSPs and triggers the necessary repairs and re-optimizations.

A stateless PCE can calculate cross-area traffic-engineering-constrained LSP paths.

A stateful PCE can allow LSPs to reserve bandwidth.

One interface can belong to an admin group and SRLG group at the same time.

A link attribute has to be assigned to a particular interface under the [/configure router interface] context

Bandwidth availability as a link attribute cannot be configured.

The interfaces used for SR-TE LSPs have to be added to the MPLS context.

Fast re-route is a temporary fix that becomes active for a short period of time after a local network failure.

Fast re-route typically protects the active segment of a tunnel, but under certain conditions it can protect an end-to-end multi-segment tunnel instead.

On a Nokia 7750 SR, R-LFA and TI-LFA can be enabled independently of each other.

The parameter "max-sr-frr-labels" limits the number of labels that R-LFA can add to the data packet encapsulation.