Multilink frame relay

[rlangley]

I have an existing frame relay T3 on a serial interface with multiple existing PVCs on sub-interfaces. Is it possible to configure 2 PVCs as additional sub-interfaces on this frame relay T3 and configure them as a multilink frame relay bundle without affecting the existing sub-interfaces (mostly T1 PVCs)? The router is a 7606 with IOS 12.2(18)SXD. The remote router is expected to be an Adtran 3305 router with multilink frame relay on two T1 circuits.

Thanks,

Robert Langley

Oso Grande Technologies, Inc.

langley@osogrande.com

505-345-6555

[attrgautam]

Not sure if you can do that. To make a link a part of MFR, you would need to specify encapsulation which wou will not be able to do on a FR subinterface.

[Georg Pauwen]

Hello Robert,

not sure if this is an option for you, but you could try Multilink PPP over Frame Relay, the configuration would look something like this:

interface Multilink1

ip address 192.168.1.1 255.255.255.252

ppp multilink

multilink-group 1

!

interface Serial0/0

encapsulation frame-relay

no frame-relay inverse-arp

!

interface Serial0/0.101 point-to-point

frame-relay interface-dlci 101 ppp virtual-template1

!

interface Serial0/0.102 point-to-point

frame-relay interface-dlci 102 ppp virtual-template1

!

interface Virtual-Template1

ppp multilink

multilink-group 1

You could even configure ppp authentication:

interface Virtual-Template1

ppp multilink

multilink-group 1

--> ppp authenticatio chap

!

--> username Multilink password CISCO

HTH,

GP

[crivera]

I don't think you will have issues with the other pvcs already configured. Be careful with special configurations you have to make for routing protocols like ospf when in runs over a point to multipoint network.