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

G.993.5 Vectoring support for VDSL modules on SRX Series devices



Article ID: KB31818 KB Last Updated: 15 Jun 2017Version: 1.0

Starting with Junos 12.1X46-D55, firmware v2.16.0 is available for SRX-MP-1VDSL-A to support VDSL vectoring. Vectoring on VDSL reduces crosstalk and increases network bandwidth.


A new version of SRX was installed, but not seeing updated firmware version for VDSL card:

root> show version
Model: srx110h2-vb
JUNOS Software Release [12.3X48-D40.5]
JUNOS Firmware Software Suite [12.1X46-D65.4] <<< Newer version that should have the v2.16.0 

root> show system firmware
Part             Type           Tag Current   Available Status
                                    version   version
FPC 1          
  PIC 0          VDSLBCM        10  2.15.0              OK   <-- Wrong firmware version
Routing Engine 0 RE BIOS        0   2.8       2.8       OK               
Routing Engine 0 RE BIOS Backup 1   2.5       2.8       OK               
Routing Engine 0 RE FPGA        14  1.0.0               OK       

Firmware v2.16.0 is needed in order to support G.993.5 VDSL Vectoring.


Even when running â€‹Junos versions with the firmware v2.16.0 installed, the SRX is not activating it because the ISDN VDSL (Annex B) card doesn’t support VDSL vectoring.

root> show chassis hardware
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                                                SRX110H2-VB
FPC 1                                                                  FPC
  PIC 0                                                                Internal VDSL2/ADSL-ISDN <-- Not supported hardware for this feature.

Only POTS module has this feature support (VDSL2 Annex A). For ISDN (Annex-B), this was not implemented.

If VDSL vectoring is really needed to establish the connection with the service provider, then the SRX must be running Annex-A card. 

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