Multilink Frame Relay

The maximum speed of traditional frame relay is 2M, and due to the new feature of Cisco IOS, FRF.16.1, you can bindle multiple frame relay links together to increase the bandwidth.

Restrictions of MFR:
1. Frame Relay fragmentation (FRF.12) is not supported.
2. Cisco Express Forwarding (CEF) is not supported.

Configuration Example for Multilink Frame Relay:

R6 ====(2 FR links)====R9
Configuration of R6:

interface MFR1
no ip address
!
interface MFR1.1 point-to-point
ip address 150.50.69.1 255.255.255.252
frame-relay interface-dlci 96
!
interface Serial1/1
no ip address
encapsulation frame-relay MFR1
serial restart-delay 0
no arp frame-relay
!
interface Serial1/2
no ip address
encapsulation frame-relay MFR1
serial restart-delay 0
no arp frame-relay
!

Configuration of R9:

frame-relay switching
!
interface MFR1
no ip address
frame-relay intf-type dce
!
interface MFR1.1 point-to-point
ip address 150.50.69.2 255.255.255.252
frame-relay interface-dlci 96
!
interface Serial1/1
no ip address
encapsulation frame-relay MFR1
serial restart-delay 0
no arp frame-relay
!
interface Serial1/2
no ip address
encapsulation frame-relay MFR1
serial restart-delay 0
no arp frame-relay
!
interface Serial1/3
no ip address

TIPS:
One side needs to configure as intf-type dce, and to configure intf-type dce, frame-relay switching must be enabled.