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  • Support for optimizing auto-bandwidth adjustments for MPLS LSPs (QFX10008)—Starting in Junos OS Release 21.4R1, you can configure faster auto-bandwidth adjustment for MPLS LSPs under overflow or underflow conditions. This feature decreases the minimum allowed value of 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 before Junos OS Release 21.4R1, the adjust-interval value is 300 seconds under overflow or underflow conditions.

    You can configure a faster in-place LSP bandwidth update that avoids signaling of a new LSP instance as part of make-before-break. To configure, include the in-place-lsp-bandwidth-update configuration statement at the [edit protocols mpls label-switched-path lsp-name] hierarchy level.

    You can also configure RSVP interfaces to support subscription percentage per priority. To configure, include the subscription priority priority percent value configuration statement at the [edit protocols rsvp interface interface-name] hierarchy level.

    [See Configuring Optimized Auto-bandwidth Adjustments for MPLS LSPs.]

  • Support for new statement no-normalize-same-members to resize member LSPs (MX Series and PTX Series)—In Junos OS Release 21.4R1, we've added the no-normalize-same-members statement to the container LSP normalization configuration under the [edit protocols mpls container-label-switched-path NAME splitting-merging] hierarchy. When you enable the no-normalize-same-members configuration, you only resize the existing member LSPs with equal bandwidth. In earlier Junos OS releases, if normalization does not need to create or delete any member LSPs, you resignal the member LSPs with equal bandwidth.

    [See splitting-merging.]