This article explains what must be done when transient ICHIP stream conditions are observed, along with the "PFE:.*ICHIP:.*IWO Stream Wedge Detected." syslog message.

The following logs are reported:

%PFE-3: fpc3 ICHIP(3): New timeout errors in WO HDRF, iwo_hdrf_poll_stats 
%PFE-3: fpc3 CMALARM: Error (code: 1214, type:Minor) encountered, cmalarm_passive_alarm_signal 
%PFE-3: fpc3 ICHIP(3) IWO Stream Wedge Detected 
alarmd[1873]: %DAEMON-4: Alarm set: FPC color=RED, class=CHASSIS, reason=FPC 3 Major Errors
craftd[1722]: %DAEMON-4:  Major alarm set, FPC 3 Major Errors
%PFE-3: fpc3 I Chip:ICHIP(3) IWO Stream Wedge Detected  

The Ichip Wan Output Header_FIFO block is dropping packets when building the L2/L3 Header of the packets. Under certain conditions, such as redirect messages or MTU errors, these drops are normal. However, if any corresponding syslog error messages and/or stream wedge messages are reported, contact JTAC for further assistance.

• Examine the output of the following commands to help determine the cause of this message:
  • show log messages
  • show log chassisd
  • show chassis environment
  • show chassis alarms

• Look for any related events that occurred at or just before the messages.

• Use the following shell commands to check for other problems that may be causing the ICHIP errors. 

start shell pfe network fpc(#) / cfeb(#)
> show syslog messages
> show nvram
> show ichip (#) wo statistics 
> show ichip (#) wo statistics hdrf 
> show ichip (#) spi(#) errors
> show ichip (#) spi(#) status
> exit

• Perform either of the following steps during a maintenance window:

  • Soft restart the FPC
    > request chassis fpc (offline | online | restart) slot  slot-number

  • Re-seat the FPC

If the failure messages continue, contact JTAC to further investigate the issue.

2021-3-17: Added valid command line to soft restart the FPC slot. Other content is valid and correct.