[c-nsp] activating MLP on ATM ADSL

[Adam Greene]

Hi,

I've been tasked with bonding some ATM ADSL links together into a multilink 
bundle. The objective is to enable customers to double their throughput by 
obtaining (2) DSL lines from us.

The head end is a 7206 (NPE200) running C7200-IS-M 12.3(15b). The CPE end is 
a Cisco 1841 running (C1841-IPBASE-M) 12.4(1c).

Is it as simple as putting "ppp multilink" under Virtual-Template1 of the 
head-end and "ppp multilink" under the (2) Dialer interfaces of the CPE end? 
Will there be any problem allowing multiple customers to bond links with 
these configs? Maybe I need to specify a Multilink interface on the 7206 and 
create unique multilink groups for each customer?

In the archives, someone also suggested putting "lcp renegotiation always" 
under vpdn-group 1 on the 7206 to allow the cpe and lns to re-negotiate for 
ppp multilink, if the cpe asks for it. I'm not sure if that's really needed 
in this case.

I'm short on lab equipment so any experimentation I do has to be on the 
production equipment. Obviously I'm reticent to try anything out which will 
disrupt the many active links on the 7206.

Thanks for any advice (or better yet, working configs!!) you can share.

Adam


Current configurations:

=============
7206 HEAD END
=============

!
vpdn enable
vpdn ip udp ignore checksum
!
vpdn-group 1
 accept-dialin
  protocol pppoe
  virtual-template 1
 ip mtu adjust
!
interface ATM1/0
 bandwidth 44793
 no ip address
 no ip redirects
 no ip mroute-cache
 logging event subif-link-status
 atm scrambling cell-payload
 no atm ilmi-keepalive
!
interface ATM1/0.304 point-to-point
 ip unnumbered Loopback0
 ip access-group VerizonDSLIn in
 ip access-group VerizonDSLOut out
 pvc 1/304
  encapsulation aal5snap
  protocol pppoe
!
interface ATM1/0.305 point-to-point
 ip unnumbered Loopback0
 ip access-group VerizonDSLIn in
 ip access-group VerizonDSLOut out
 pvc 1/305
  encapsulation aal5snap
  protocol pppoe
!
interface Virtual-Template1
 mtu 1492
 ip unnumbered Loopback0
 ip access-group VerizonDSLIn in
 ip access-group VerizonDSLOut out
 peer default ip address pool pppoe-pool
 ppp authentication pap
!


========
1841 CPE
========

!
interface ATM0/0/0
 no ip address
 no ip mroute-cache
 no atm ilmi-keepalive
 dsl operating-mode auto
 hold-queue 224 in
 pvc 0/35
  encapsulation aal5snap
  pppoe-client dial-pool-number 1
 !
!
interface ATM0/1/0
 no ip address
 no ip mroute-cache
 no atm ilmi-keepalive
 dsl operating-mode auto
 hold-queue 224 in
 pvc 0/35
  encapsulation aal5snap
  pppoe-client dial-pool-number 2
 !
!
interface Dialer1
 ip address negotiated
 ip mtu 1492
 encapsulation ppp
 no ip mroute-cache
 dialer pool 1
 dialer idle-timeout 0
 dialer-group 1
 ppp authentication pap callin
 ppp pap sent-username ***** password 7 *****
!
interface Dialer2
 ip address negotiated
 ip mtu 1492
 encapsulation ppp
 no ip mroute-cache
 dialer pool 2
 dialer-group 2
 ppp authentication pap callin
 ppp pap sent-username ***** password 7 *****
!