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@router> 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@router> 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
2022-03-23: removed invalid links