Description

This article provides information on how to convert a SPU (Services Processing Unit) from CP-flow to a dedicated CP on the SRX3400 and SRX3600.

Symptoms

How to convert a SPU from CP-flow to a dedicated CP on the SRX3000 platform.

Solution

 

By default, SRX3400 and SRX3600 devices are in the combo mode, as per the perspective of the SPC (Services Processing Card), which means that the SPC acts as both the CP SPU and FLOW SPU . With this approach, only half the resources of the SPC are given to the Central Point (CP). This may decrease the performance, when the traffic is high. To overcome this, there is a way to make an SPC a dedicated CP, which provides it full resources for flow processing.

To achieve this, you need to install the Extreme license:  Expanded Performance and Capacity License (SRX3K-EXTREME-LTU). This license also increases the session limit on the CP. This license has to be added on the cluster (both nodes). Make sure that there are at least two SPCs on both the nodes to achieve this. Both the nodes have to be rebooted for this license to take effect.


To add license on the SRX device, refer to request system license add . For more information on Extreme license and outputs, refer to KB24134 - How to check if Extreme license (SRX3K-EXTREME-LTU) is successfully installed on SRX3000 Series devices [juniper.net] .


After the reboot, a dedicated CP looks like this: 
{primary:node0}
root@jws-edcf5> show chassis hardware | no-more 
node0:
--------------------------------------------------------------------------
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                AA1809AA0153      SRX 3400
Midplane         REV 07   710-015748   VR2444            SRX 3400 Midplane
PEM 0            rev 05   740-027644   G087E7001405P     AC Power Supply
CB 0             REV 11   750-021914   AAAB5062          SRX3k RE-12-10
  Routing Engine          BUILTIN      BUILTIN           Routing Engine
  CPP                     BUILTIN      BUILTIN           Central PFE Processor
  Mezz           REV 08   710-021035   AAAB6723          SRX HD Mezzanine Card
CB 1             REV 10   750-032474   AADT5498          SRX3k CRM
FPC 0            REV 11   750-021882   AAAD9767          SRX3k SFB 12GE
  PIC 0                   BUILTIN      BUILTIN           8x 1GE-TX 4x 1GE-SFP
FPC 1            REV 12   750-020324   TV3687            SRX3k 16xGE TX
  PIC 0                   BUILTIN      BUILTIN           16x 1GE-TX
FPC 5            REV 12   750-016077   AABB6809          SRX3k SPC
  PIC 0                   BUILTIN      BUILTIN           SPU Cp
FPC 6            REV 12   750-017866   AAAD1568          SRX3k NPC
  PIC 0                   BUILTIN      BUILTIN           NPC PIC
FPC 7            REV 10   750-016077   AAAC3549          SRX3k SPC
  PIC 0                   BUILTIN      BUILTIN           SPU Flow
Fan Tray 0       REV 06   750-021896   AAAD9108          SRX 3400 Fan Tray

node1:
--------------------------------------------------------------------------
Hardware inventory:
Item             Version  Part number  Serial number     Description
Chassis                                AA1809AA0155      SRX 3400
Midplane         REV 07   710-015748   AAAD9612          SRX 3400 Midplane
PEM 0            rev 05   740-027644   G087E600CA05P     AC Power Supply
CB 0             REV 11   750-021914   TV3717            SRX3k RE-12-10
  Routing Engine          BUILTIN      BUILTIN           Routing Engine
  CPP                     BUILTIN      BUILTIN           Central PFE Processor
  Mezz           REV 08   710-021035   TV3620            SRX HD Mezzanine Card
CB 1             REV 07   750-032474   AABR2672          SRX3k CRM
FPC 0            REV 11   750-021882   AAAD9806          SRX3k SFB 12GE
  PIC 0                   BUILTIN      BUILTIN           8x 1GE-TX 4x 1GE-SFP
FPC 5            REV 10   750-016077   AAAC3511          SRX3k SPC
  PIC 0                   BUILTIN      BUILTIN           SPU Cp
FPC 6            REV 12   750-017866   AAAD1559          SRX3k NPC
  PIC 0                   BUILTIN      BUILTIN           NPC PIC
FPC 7            REV 10   750-016077   AAAD6623          SRX3k SPC
  PIC 0                   BUILTIN      BUILTIN           SPU Flow
Fan Tray 0       REV 06   750-021896   AAAD9137          SRX 3400 Fan Tray