Support Support Downloads Knowledge Base Juniper Support Portal 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

Sheaf messages on the EX series Switch

0

0

Article ID: KB19594 KB Last Updated: 04 Mar 2017Version: 3.0
Summary:

This article provides insight on sheaf memory and the related log message it populates on the EX series Switch.

Symptoms:
The occurrence of log messages related to sheaf memory need not always indicate the presence of a memory leak.  This is validated through the example in this article
Cause:
 
Solution:
Sheaf memory deals with the transfer of control and data packets between theRrouting Engine (RE) and the Packet Forwarding Engine (PFE). The sheaf background thread checks periodically for leaks to make sure the allocation of memory is not going beyond six times the maximum entries. On the EX Switch we will come across following logs :

fpc0 SHEAF: %PFE-3: possible leak, ID 5 (packet(100)) (405/10/40)
fpc0 SHEAF: %PFE-3: possible leak, ID 5 (packet(100)) (405/10/40)
fpc0 SHEAF: %PFE-3: possible leak, ID 5 (packet(100)) (405/10/40)
fpc0 SHEAF: %PFE-3: possible leak, ID 5 (packet(100)) (405/10/40)
The occurrence of this message doesn't necessarily indicate the presence of a memory leak. The message is a representation of a spike due to excess traffic. We see the above leak message reoccurs after 60 seconds where we see the Sheaf ID, the name, (total allocated, minimum, maximum). Here the total allocated is 10 times higher than the max value. Here a function will syslog an alert once we go 6 times higher than the maximum value set. if the error stops over sometime then certainly we have no leak.

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