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Cisco Bug: CSCvs45231 - Memory exhaustion in sessmgrd process due to EAPoL announcement

Last Modified

Oct 16, 2020

Products (8)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco Catalyst 9500 Series Switches
  • Cisco Catalyst 3650 Series Switches
  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 9200 Series Switches
  • Cisco Catalyst 9600 Series Switches
  • Cisco Catalyst 9300 Series Switches
  • Cisco Catalyst 9400 Series Switches

Known Affected Releases


Description (partial)

Device running IOS-XE 16.X version might report a memory leak problem  under the sessmgrd process.
Commands to isolate this issue:

show processes memory platform sorted.
Output of the show platform software memory smd rp active command might show module "OBJ_SMUTILS_PAK_ALLOC" and "UNKNOWN ID" with  high overhead value.

Engage TAC to isolate this further

The leak is triggered by Eapol (Extensible Authentication Protocol) announcement packet coming to switch, and the size will be equal to size of the packet.

There needs to be 802.1x authentication, and until a client is authenticated, 802.1x access control allows only Extensible Authentication Protocol over LAN (EAPOL) traffic through the port to which the client is connected.

Related Community Discussions

16.12.3 Beta Release for Catalyst Switches
  Enterprise Switching Business Unit is glad to announce Beta release 16.12.3 for all Catalyst 9200/9300/9400/9500/9600. This release is made available to allow users to test, evaluate and share feedback before General Availability (GA). We encourage you to test the Beta code and share your feedback as soon as possible.  Obtaining Pre-Release Software  Please fill-up a simple request access form, you will receive an email with links to download the software.   What’s New in 16.12.3?  16.12.3 is a ...
Latest activity: Mar 18, 2020
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Bug Details Include

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