Configuration Tasks

MLFR configuration consists of three major tasks, each with several steps:

1. Create the member links to be aggregated into a multilink bundle.

1. Specify the interface on which you want to configure MLFR.

host1(config)#interface serial 2/0:1

1. Specify MLFR as the encapsulation method on the interface.

host1(config-if)#encapsulation mlframe-relay ietf

2. Add member links to a multilink bundle.

1. Define the MLFR bundle.

host1(config)#interface mlframe-relay boston

1. Add each member link.

host1(config-if)#member-interface serial 2/0:1

1. (Optional) Add a description to the major interface.

host1(config-if)#frame-relay description 
bostonBundleDescription

1. (Optional) Configure Frame Relay parameters.

host1(config-if)#frame-relay intf-type dce

host1(config-if)#frame-relay lmi-type cisco

3. Configure the Frame Relay subinterface.

1. Define the subinterface for the MLFR bundle.

host1(config)#interface mlframe-relay boston.1

1. Assign a DLCI for the subinterface.

host1(config-subif)#frame-relay interface-dlci 16 ietf

1. (Optional) Add a description to the subinterface.

host1(config-subif)#frame-relay description 
bostonBundleSubOneDescription

1. Assign an IP address to the subinterface.

host1(config-subif)#ip address 10.10.100.1 255.255.255.0

Example

The following example configures three T1 lines and aggregates them into a multilink bundle called boston.

host1(config)#interface serial 2/0:1

host1(config-if)#encapsulation mlframe-relay ietf

host1(config-if)#exit

host1(config)#interface serial 2/0:2

host1(config-if)#encapsulation mlframe-relay ietf

host1(config-if)#exit

host1(config)#interface serial 2/0:3

host1(config-if)#encapsulation mlframe-relay ietf

host1(config-if)#exit

host1(config)#interface mlframe-relay boston

host1(config-if)#member-interface serial 2/0:1

host1(config-if)#frame-relay description 
bostonBundleDescription

host1(config-if)#frame-relay intf-type dce

host1(config-if)#frame-relay lmi-type cisco

host1(config-if)#member-interface serial 2/0:2

host1(config-if)#member-interface serial 2/0:3

host1(config-if)#exit

host1(config)#interface mlframe-relay boston.1

host1(config-subif)frame-relay description 
bostonBundleSubOneDescription

host1(config-subif)#frame-relay interface-dlci 16 ietf

host1(config-subif)#ip address 10.10.100.1 255.255.255.0

Configuring Frame Relay Versus MLFR

All the configuration commands that apply to Frame Relay also apply to MLFR. The following listing describes commands specific to configuring MLFR; for other Frame Relay commands, see Chapter 2, Configuring Frame Relay.

    encapsulation ietf

• Use to configure MLFR as the encapsulation method on an individual interface.
• Use this command only within the context of an individual interface. Issuing this command creates an MLFR link, also referred to as an MLFR bundle member.
• Example

host1(config)#interface serial 2/0:1

host1(config-if)#encapsulation mlframe-relay ietf

• Use the no version to disable MLFR on an interface.

    frame-relay description

• Use to assign a text description or an alias to a MLFR major interface or subinterface.
• Description name can be up to 64 characters.
• Use the no version to remove the text description or alias from the MLFR major interface or subinterface.

    interface mlframe-relay

• Use to create a Frame Relay major interface, also known as the MLFR bundle.
• Example

host1(config-if)#interface mlframe-relay group2

• Use the no version to delete the MLFR bundle.

    member-interface

• Use to add an MLFR interface—also known as an MLFR bundle member—to an MLFR bundle.
• Example

host1(config-if)#member-interface serial 2/0:1

• Use the no version to remove the specified interface from the MLFR bundle.