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Home Documentation Junos OS Junos CLI Reference CLI Reference D

Junos CLI Reference

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Junos CLI Reference
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deselect-on-bandwidth-failure

date_range 12-Mar-25
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Syntax

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deselect-on-bandwidth-failure {
    tear-lsp;
}

Hierarchy Level

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[edit protocols mpls],
[edit protocols mpls label-switched-path path-name]

Description

Deselect an active path if it does not meet the auto-bandwidth criteria required for path selection.

Traffic flows on LSP are periodically measured which are configured with auto-bandwidth. The LSP path bandwidth is adjusted by increasing or decreasing the bandwidth based on the traffic flow. For example, let's say there is an LSP path configured with auto-bandwidth enabled, which has 1 gigabyte bandwidth reservation. When the traffic flow increases to 2 gigabytes and during auto-bandwidth adjustment, an attempt is made to increase the path bandwidth reservation to 2 gigabytes. If the attempt to increase the path bandwidth reservation to 2 gigabytes is not possible, then the bandwidth adjustment fails and the LSP stays UP with 1 gigabyte bandwidth reservation.

If you enable the deselect-on-bandwidth-failure CLI statement on an auto-bandwidth LSP and when the bandwidth adjustment fails, then the path is brought down. If there are no secondary paths available in the LSP that satisfies the bandwidth requirement, then the entire LSP goes down.

If the deselect-on-bandwidth-failure CLI statement is not configured on an auto-bandwidth LSP and when the bandwidth adjustment fails, the LSP stays up with the existing bandwidth reservation.

The deselect-on-bandwidth-failure statement does not apply to static bandwidth.

Options

tear-lsp

Bring down an active path if none of the paths are able to reserve the required bandwidth.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 15.1.

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