Packet Tracer fails with “ERROR: TRACER: NP failed tracing packet”
If you are getting this error message when trying to do packet tracer you hit a bug CSCvi37889.
asa/pri/act# packet-tracer input inside tcp 10.1.0.10 1235 8.8.8.8 443 detailed
ERROR: TRACER: NP failed tracing packet
You can get this fixed by removing existing captures on your firewall.
First check if any captures exist:
asa/pri/act# sh cap
capture capout type raw-data interface outside [Buffer Full – 524138 bytes]
match ip host 208.172.16.78 host 208.183.87.46
capture asp type asp-drop all circular-buffer [Capturing – 523926 bytes]
Remove them:
no cap capout
no cap asp
Run your tracer again:
asa/pri/act# packet-tracer input inside tcp 10.1.0.10 1235 8.8.8.8 443 detailed
Phase: 1
Type: ACCESS-LIST
Subtype:
Result: ALLOW
Config:
Implicit Rule
Additional Information:
Forward Flow based lookup yields rule:
If it runs you are good. Otherwise you need to reload your box.
Additionally, good rule of thumb is to ALWAYS remove your captures once you are done. No reason to hug the buffer.
Regards,
Bart
Reference:
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvi37889/?rfs=iqvred
Thanks that did it!
I’m glad it worked out for you!