ML-PPP over FR question

From: Roger RPF (rpf@bluemail.ch)
Date: Thu Sep 25 2008 - 13:03:18 ART

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Hi group,

I have a question regarding MLPPP over Frame Relay. What is the difference
between the following two configs? I don't understand why we have in the
second example an additional step over the interface Multilink1.
In which case do we need the interface Multilink?

!
interface Serial0/1/0
 no ip address
 encapsulation frame-relay
 frame-relay traffic-shaping
 frame-relay interface-dlci 504 ppp Virtual-Template1
 frame-relay interface-dlci 514 ppp Virtual-Template1
 frame-relay interface-dlci 524 ppp Virtual-Template1
 no frame-relay inverse-arp
!
interface Virtual-Template1
 ip address 1.1.1.0 255.255.255.0
 ppp multilink
!

and

interface Multilink 1
 ip address 1.1.1.0 255.255.255.0
!
interface virtual-template1
 ppp multilink group 1
!
!
interface Serial0/1/0
 no ip address
 encapsulation frame-relay
 frame-relay traffic-shaping
 frame-relay interface-dlci 504 ppp Virtual-Template1
 frame-relay interface-dlci 514 ppp Virtual-Template1
 frame-relay interface-dlci 524 ppp Virtual-Template1
 no frame-relay inverse-arp
!

Many thanks in advance

Roger

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