Support Support Downloads Knowledge Base Case Manager My Juniper Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

[SRX/J-series] How to configure channelized T1 links (ct1) in MLPPP bundle (lsq)

0

0

Article ID: KB23962 KB Last Updated: 05 Mar 2017Version: 3.0
Summary:

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

Symptoms:

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 
Cause:

Solution:

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


Related Links

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search