This article describes how to configure channelized T1 links (ct1) in an MLPPP Bundle (lsq).

A user has two channelized T1 links (ct1) and want to configure them in the MLPPP Bundle (lsq):

root@PFME> show interfaces terse 
Interface               Admin Link Proto    Local                 Remote
lsq-0/0/0               up    up  
ct1-1/0/0               up    down
ct1-1/0/1               up    down 

Ensure correctly specified T1 cables are being used, so that the interfaces are physically up:

root@PFME> show interfaces terse 
Interface               Admin Link Proto    Local                 Remote
lsq-0/0/0               up    up  
ct1-1/0/0               up    up
ct1-1/0/1               up    up

Change the channelized T1 links into T1 links using the following command:

root# set interfaces ct1-1/0/0 no-partition interface-type t1
root# set interfaces ct1-1/0/1 no-partition interface-type t1
root# commit

root> show interfaces terse 
Interface               Admin Link Proto    Local                 Remote
lsq-0/0/0               up    up  
ct1-1/0/0               up    up
t1-1/0/0                up    up
ct1-1/0/1               up    up
t1-1/0/1                up    up

Bring the above configured T1 links in the MLPPP bundle:

root# set interfaces t1-1/0/0 clocking external
root# set interfaces t1-1/0/0 unit 0 family mlppp bundle lsq-0/0/0.0
root# set interfaces t1-1/0/1 clocking external
root# set interfaces t1-1/0/1 unit 0 family mlppp bundle lsq-0/0/0.0
root# commit


If the above configuration does not bring the T1 physical link up, then change the clocking to internal:

root# set interfaces t1-1/0/0 clocking internal
root# set interfaces t1-1/0/0 clocking internal
root# commit

One side of the interface should have clocking as internal and other side should have clocking as external. When the correct clocking is configured, T1 will be up:

root> show interfaces terse 
Interface               Admin Link Proto    Local                 Remote
lsq-0/0/0               up    up  
ct1-1/0/0               up    up  
t1-1/0/0                up    up  
t1-1/0/0.0              up    down mlppp    lsq-0/0/0.0
ct1-1/0/1               up    up  
t1-1/0/1                up    up  
t1-1/0/1.0              up    down mlppp    lsq-0/0/0.0

Configure the lsq-0/0/0 interface to bring the channelized T1 interfaces in a LSQ MLPPP bundle:

root# set interfaces lsq-0/0/0 unit 0 encapsulation multilink-ppp
root# set interfaces lsq-0/0/0 unit 0 family inet address 1.1.1.1/24
root# commit

root> show interfaces terse 
Interface               Admin Link Proto    Local                 Remote
lsq-0/0/0               up    up  
lsq-0/0/0.0             up    up   inet     1.1.1.1/24      
ct1-1/0/0               up    up  
t1-1/0/0                up    up  
t1-1/0/0.0              up    up   mlppp    lsq-0/0/0.0
ct1-1/0/1               up    up  
t1-1/0/1                up    up  
t1-1/0/1.0              up    up   mlppp    lsq-0/0/0.0

For more information about MLPP T1 Bundle refer to [KB13286]How to configure a MLPPP T1 bundle