Packet drop in the Firewall

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L3 Networker

Packet drop in the Firewall

Recently, we did a Migration activity, From the Juniper SRX to Palo Alto.

 

After successful Migration, we can notice that one drop over the PA firewall.

We did troubleshooting from our end and in the global counter can see below error with drops

 

flow_fpga_ingress_exception_err  1865  19 drop      flow      offload   Packets dropped: receive ingress exception error from offload processor

 

Tried to packet capture but don’t see any packet capture for this traffic.

 what is this error and why Paloalto is dropping this flow?


Accepted Solutions
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L2 Linker

Hi,

 

when packets are being offloaded they never do reach the dataplane. Because of this you won't be able to capture any packets. Offloading basically happens when all findings on AppID and ContentID have been made. Please make yourself familiar with offloading. When done you can try to disable it globally on the firewall. Be aware that depending on your traffic the CPU utilization might raise. Packets will then show up in captures. A good start would be this article.

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClWFCA0

Kind regards,
René
// If you like my answer force commit it.

View solution in original post


All Replies
Highlighted
L2 Linker

Hi,

 

when packets are being offloaded they never do reach the dataplane. Because of this you won't be able to capture any packets. Offloading basically happens when all findings on AppID and ContentID have been made. Please make yourself familiar with offloading. When done you can try to disable it globally on the firewall. Be aware that depending on your traffic the CPU utilization might raise. Packets will then show up in captures. A good start would be this article.

 

https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClWFCA0

Kind regards,
René
// If you like my answer force commit it.

View solution in original post

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