Configuring bandwidth for a MPLS fast reroute

To define a bandwidth constraint for the fast reroute path, complete the following steps.

Enable the device for configuration.
```
device# configure
```
Enable the MPLS router.
```
device(config)# router mpls
```
Configure the LSP.
```
device(config-router-mpls)# lsp frr_tunnel
```
In this example, the LSP name is frr_tunnel .

Enable configuration of fast reroute options.

device(config-router-mpls-lsp-frr_tunnel)# frr

Configure the bandwidth for the backup LSP.
```
device(config-router-mpls-lsp-frr_tunnel-frr)# bandwidth 100
```
In this example, the bandwidth is configured 100 kbits/sec. for the backup LSP. The acceptable value can be between zero (0) and two (2) Gbps, with 0 being the default value.

Example

The example below defines a bandwidth of 100 kbits/sec. for the fast reroute path.

device# configure 
device(config)# router mpls
device(config-router-mpls)# lsp frr_tunnel
device(config-router-mpls-lsp-frr_tunnel)# frr
device(config-router-mpls-lsp-frr_tunnel-frr)# bandwidth 100

An additional way to add bandwidth to a FRR path is by using the bandwidth inherit command.