reservable-bandwidth

The reservable-bandwidth command is configurable on an MPLS-enabled interface at any time. The configuration of the command takes effect immediately upon preemption of the LSP.

Syntax

reservable-bandwidth { decimal | [ percentage decimal ] }
no reservable-bandwidth { decimal | [ percentage decimal ] }

Command Default

The default value is the total physical bandwidth of the interface.

Parameters

decimal
The decimal variable specifies a value from 0 through 2,000,000,000 in kbps.
percentage decimal

The percentage decimal parameters specify a value from 0 through 100. The percentage value of 100 specifies that the entire interface bandwidth can be used by MPLS LSPs, when needed.

Modes

MPLS interface mode (config-router-mpls-if-eth).

Usage Guidelines

The no form of the command sets the maximum reservable bandwidth back to the default value.

When the maximum reservable bandwidth is configured as a percentage value for LAGs and VE interfaces, and ports go down, or new ports are added to the interface, the reservable bandwidth is recalculated as a percentage of the newly available bandwidth for that interface.

When the maximum reservable bandwidth is configured as either an absolute value, or a percentage value, the value is recalculated and updated to the latest value.

MPLS is supported on the Extreme 8820, SLX 9740, SLX 9640, and SLX 9540 devices only.

Examples

The example below shows the configuration of the maximum reservable bandwidth for MPLS LSPs with an absolute value of 10000 kbps.

device# configure
device(config)# router mpls
device(config-router-mpls)# mpls-interface ethernet 0/1
device(config-router-mpls-if-eth-0/1)# reservable-bandwidth 10000

The following example configures the maximum reservable bandwidth as a percentage (80%) of the total interface bandwidth for the MPLS LSPs on the interface.

device# configure
device(config)# router mpls
device(config-router-mpls)# mpls-interface ethernet 0/1
device(config-router-mpls-if-eth-0/1)# reservable-bandwidth percentage 80

The following example shows when the maximum reservable bandwidth is changed from an absolute value to a percentage value, and vice versa, the following advisory message displays on the console to indicate the configuration change.

device# configure
device(config)# router mpls
device(config-router-mpls)# mpls-interface ethernet 0/1
device(config-router-mpls-if-eth-0/1)# reservable-bandwidth percentage 40
Maximum reservable bandwidth is changed from 30 kbps to 40%

The following example shows using the no form of the command to set the maximum reservable bandwidth back to the default value (the total physical bandwidth of the interface) when using the absolute value or percentage value.

device# configure
device(config)# router mpls
device(config-router-mpls)# mpls-interface ethernet 0/1
device(config-router-mpls-if-eth-0/1)# no reservable-bandwidth percentage 80