The "no chunk index" message reports that the packet size used in the forwarding path at certain stage is greater than the original packet size.

This is a Troubleshooting Article for a PFE ASIC Syslog Event.
To view other documented syslog events related to XMCHIP, XLCHIP, MQCHIP, LUCHIP, EACHIP, and PECHIP, see KB31893 - Master Index of Articles for Troubleshooting PFE ASIC Syslog Events [juniper.net] .

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When a "no chunk index" event occurs, a message similar to the following is reported:

Jul 23 18:52:38.743 router0: %PFE-3: fpc8 Cmerror Op Set: EA[0:0]: EA[0:0]: HMCIF Rx: HMCIF has no chunk index available for incoming WO read

Indications:

• Traffic impact or permanent impact on packet forwarding will be seen if errors are seen repeatedly

• Alarm will be raised​

This is due to a transient hardware issue.

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Perform these steps to determine the cause and resolve the problem (if any).  Continue through each step until the problem is resolved.

1. Collect the show command output.

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   Capture the output to a file (in case you have to open a technical support case). To do this, configure each SSH client/terminal emulator to log your session.

   show log messages
show log chassisd
start shell network pfe <fpc#>
show nvram
show syslog messages
exit

2. Analyze the show command output.

   In the 'show log messages', review the events that occurred at or just before the appearance of the "no chunk index" message. Frequently these events help identify the cause.

   • No RMA is required

   • FPC restart  during a maintenance window

   • Collect additional debug information with the script in KB31922 - shell script collecting data if packet forwarding at Packet Forwarding Engine is compromised  [juniper.net]

   • Contact your technical support representative if this issue is seen after the FPC restart.

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This article is indexed in  KB31893 - Primary Index of Articles for Troubleshooting PFE ASIC Syslog Events [juniper.net] ; tag EACHIPTSG

2019-10-01: Article reviewed for accuracy; no changes required