Optimizing auto-bandwidth adjustments for MPLS LSPs

You can configure faster auto-bandwidth adjustment for MPLS LSPs under overflow or underflow conditions. This enables the ingress label edge router (LER) to perform in-place LSP bandwidth update by reusing the LSP ID when performing bandwidth change on an intra-domain LSP. This feature decreases the minimum allowed adjust-threshold-overflow-limit and adjust-interval to 150 seconds when adjust-threshold-overflow-limit and adjust-threshold-underflow-limit cross the configured threshold values. In releases earlier than Junos OS Evolved Release 20.4R1, the adjust-interval is 300 seconds under overflow or underflow conditions. You can also configure RSVP interfaces to support subscription percentage per priority. To configure faster in-place LSP bandwidth update, include the in-place-lsp-bandwidth-update configuration statement at the [edit protocols mpls label-switched-path lsp-name] hierarchy level. To configure subscription percentage per priority, include the subscription priority priority percent value configuration statement at the [edit protocols rsvp interface interface-name] hierarchy level.