advanced-feature-bandwidth-reservation Boot Flag

The switch enables the boot config flags advanced-feature-bandwidth-reservation command by default to use advanced features on the switch. If you disable the boot config flags advanced-feature-bandwidth-reservation command and attempt to enable an advanced feature, the switch displays an error message to explain why the advanced feature failed to start, and to remind you that you must enable this boot configuration flag for that advanced feature.

Important

If you change the configuration, you must save the configuration, and then reboot the switch for the change to take effect.

If you disable this feature and save the configuration, any configuration for advanced features remains saved in the configuration file but is not used.

When disabled, you can use all ports for Layer 2 or Layer 3 forwarding of standard unicast and multicast features. Use this mode if you are not configuring advanced features. The syntax for disabling this boot configuration flag is no boot config flags advanced-feature-bandwidth-reservation.

When enabled, also known as Full Feature mode, the switch supports advanced features by reassigning some of the front panel ports to be loopback ports. The following advanced features require loopback ports:

• Fabric Extend

• SPB

• SMLT

• vIST

• Fabric RSPAN (Mirror to I-SID)

• Application Telemetry

• IS-IS Accept Policies

• Segmented Management Instance CLIP interface

Note

Full Feature mode does not support PIM.

The syntax for enabling the boot flag for this mode is boot config flags advanced-feature-bandwidth-reservation [low | high | vim].

The low level parameter means that the switch reserves less bandwidth to support minimum functionality for advanced features.

The high level parameter means that the switch reserves the maximum bandwidth for the advanced features.

The vim level parameter means that the switch uses Versatile Interface Module (VIM) ports as loopback ports.

The following table shows the supported parameters and ports reserved as loopback ports on each platform:

Note

To understand restrictions on using reserved loopback ports as front panel ports on the 5420 Series, see 5420 Series.

After the switch reserves the appropriate ports to become loopback ports, the ports are no longer visible in the output when you enter show interfaces gigabitEthernet.

By default, for the 5520 Series and 5720 Series switches, if you do not install a VIM in the switch, the switch uses the vim parameter. In this configuration, the VIM ports are used as loopback ports and the Universal Ethernet ports are used as regular uplink ports. When used as regular uplink ports, the port speed for the Universal Ethernet ports is 40 Gbps as a single channel port. Although the maximum supported single channel port speed is 40 Gbps, the ports can be channelized to operate as four 10 or 25 Gbps channels.

If a VIM is already installed in the 5520 Series, the switch uses the low parameter that uses Universal Ethernet ports as loopback ports and VIM ports as regular uplink ports. For the 5720 Series, the switch uses the high parameter that uses Universal Ethernet ports as loopback ports and VIM ports as regular uplink ports.

Important

If you change the configuration, you must save the configuration, and then reboot the switch for the change to take effect.

If you disable this feature and save the configuration, any configuration for advanced features remains saved in the configuration file but is not used.

Important

You must ensure your configuration does not include reserved ports before you enable this feature. If the configuration includes reserved ports, after you enable this feature and restart the switch, the switch stops loading the configuration.