Extreme SLX-OS MPLS Configuration Guide, 20.2.1a

Configuring the underflow limit

The user can configure the underflow limit at the LSP level as well as in the auto-bandwidth template. The inheritance rules applied are the same as other auto-bandwidth parameters. The default value of underflow-limit is zero (0).

To configure the underflow-limit in an auto-bandwidth template, complete the following steps.

Enable the device for configuration.
```
device>configure
```
Enable the MPLS router.
```
device(config)# router mpls
```
Enable the auto-bandwidth template and select template. In this example, template1 is selected.
```
device(config-router-mpls)# autobw-template template1
```
Configure the underflow limit. In this example, the underflow limit is configured to 10.
```
device(config-router-mpls-autobw-template-template1)# underflow-limit 10
```

Example

The following example combines the steps above to set the underflow-limit in an auto-bandwidth template.

device>configure
device(config)# router mpls
device(config-router-mpls)# autobw-template template1
device(config-router-mpls-autobw-template-template1)# underflow-limit 10

Configuring the underflow-limit for an individual LSP.

To configure the underflow-limit for an individual LSP, complete the following steps.

Enable the device for configuration.
```
device>configure
```
Enable the MPLS router.
```
device(config)# router mpls
```
Enable LSP configuration ans select target LSP. In this example, LSP1 is selected.
```
device(config-router-mpls)# lsp lsp1
```
Enable auto-bandwidth.
```
device(config-mpls-lsp-lsp1)# autobw
```
Enable and configure the underflow-limit. In this example, the underflow-limit is configured to 10.
```
device(config-router-mpls-lsp-lsp1-autobw)# underflow-limit 10
```

Example

In the following example, the steps above are combined to configure the underflow-limit for individual LSP1 to 10.

device>configure
device(config)# router mpls
device(config-router-mpls)# lsp lsp1
device(config-mpls-lsp-lsp1)# autobw
device(config-router-mpls-lsp-lsp1-autobw)# underflow-limit 10

Clearing the underflow-limit configuration

To clear the underflow-limit configuration, use the same command as above with the no option. The underflow-limit is set back to the default value of zero (0).

Enable the device for configuration.
```
device>configure
```
Enable the MPLS router.
```
device(config)# router mpls
```
Enable LSP configuration ans select target LSP. In this example, LSP1 is selected.
```
device(config-router-mpls)# lsp lsp1
```
Enable auto-bandwidth.
```
device(config-mpls-lsp-lsp1)# autobw
```
Enable and configure the underflow-limit. In this example, the underflow-limit is configured to 10.
```
device(config-router-mpls-lsp-lsp1-autobw)# no underflow-limit 10
```

Example

In the following example, the steps above are combined to clear the underflow-limit configuration and set the configuration back to the default value of zero (0).

device>configure
device(config)# router mpls
device(config-router-mpls)# lsp lsp1
device(config-mpls-lsp-lsp1)# autobw
device(config-router-mpls-lsp-lsp1-autobw)# no underflow-limit 10