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Memory Leaks on MX/EX-Series platform with Trio MPCs for VPLS & Bridge-Domains with integrated routing and bridging (IRB) interface participating as L3 interface



Article ID: TSB17860 TECHNICAL_BULLETINS Last Updated: 10 Mar 2021Version: 5.0
Alert Type:
PSN - Product Support Notification
Product Affected:
MX and EX with TRIO ASIC
Alert Description:
Warning: With VPLS/Bridge-Domain environment, an MX/EX9200 Series router with Trio-based MPCs running affected software. The MPCs may experience NH memory leak in the PFEs when using integrated routing and bridging (IRB) interface participating in the VPLS/Bridge-domain instance. This causes the MPCs to ran out of memory and restart unexpectedly. There is no workaround.


Affected Hardware:

  • Trio-Based MPCs - all parts start with the "MPC" prefix for MX240, MX480, MX960, MX2000s
  • MX80, MX105, MX204, MX10003/8/16
  • EX9200s

Affected Software Releases :

  • 17.3R3-S8 and -S9
  • 17.4R3-S2
  • 18.2R3-S4, -S5, and -S6
  • 18.3R3-S2, and -S3
  • 18.4R3-S1, -S2, -S3, -S4, and -S5
  • 19.2R2 or later
  • 19.3R3 or later
  • 19.4R2 or later
  • 20.1R2 or later
  • 20.2R1 or later

Software fixes and unaffected Software

The complete fix for the above two issues has been provided on later releases. The following is the list of software releases where the issue is resolved : (we will update this list as fixes are available)
  • 17.3R3-S10 or later
  • 17.4R3-S3 or later
  • 18.2R3-S7 or later
  • 18.3R3-S4 or later
  • 18.4R3-S6 or later
  • 19.1Rx (not affected)
  • 19.2Rx (fix not yet available)
  • 19.3R3-S1 or later
  • 19.4R2-S3 or later, 19.4R3 or later
  •  20.1R2 or later
  •  20.2R1-S3, 20.2R2 or later
  •  20.3Rx (not affected)


Modification History:
Update software release with complete fixes 2020-10-30
Update affected software release 2020-10-20
First publication 2020-09-21

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