Description

The "DDRIF WO Checksum Error" message reports that there is a checksum error in the DDRIF memory.
This KB describes one of the possible symptoms caused by DDRIF Memory error. Please see KB31687 [juniper.net] for recommendations.

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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Symptoms

When a "DDRIF WO Checksum Error" event occurs, a message similar to the following is reported:

Aug 14 08:57:49.560 router0 fpc9 MQCHIP(0) DDRIF WO Checksum Error
Aug 14 08:57:49.560 router0 fpc9 MQCHIP(0) DDRIF WO Checksum Error Information Quantum 0 bank num 63, ddrio[3].dmcN[1].bank[7] Error bcount 32, error addr 0x20013d => cell addr 0x20013 => row:col 0800:13

The following logs could also be seen with this message:

MQCHIP(3) DDRIF WO Checksum Error Information Quantum 0 bank num 12, ddrio[0].dmcN[1]. bank[4] Error bcount 32, error addr 0xb0 = cell addr 0xb = row:col 0000:0b
MQCHIP(3) DDRIF Chksum Cnts  Current 2, Total 2
MQCHIP(3) WO Packet error ​

Indications:

  • Traffic impact or permanent impact on packet forwarding may happen if errors are seen repeatedly.
  • Traffic loss

 

Solution

This error indicates that there is a checksum error in the DDRIF packet memory. The cause may be due to a transient software or hardware issue.

This KB describes one of the possible symptoms caused by DDRIF Memory error. Please see  KB31687 [juniper.net]  for recommendations.

 


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

Tip: When looking at an event in the logs, it is important to focus on the first error message in a collection of syslog messages. The first error message is usually the cause of all the follow-on error messages. The follow-on collateral damage error messages can be ignored.

 

Modification History

2022-01-03: Article modified to point to the main DDRIF article - KB31687 [juniper.net]
2019-10-14: Article reviewed for accuracy; no changes required.