the problem of Download speed degradation on Vwire mode

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the problem of Download speed degradation on Vwire mode

L3 Networker

Hello all.

I had a chance to demo for prospective customer and PA was installed at customer’s real networks with V-wire mode.

After installed I tried to speed test using speed test sites.

Upload was ok, but download speed was degradation. (I tested at firmware 3.1.9 and 4.0.1, but both results were same.)

All of VWire interfaces speed/duplex were in Auto-negotiation, and interfaces were established with 1000M/full duplex.

Please let me know that resolve way, if someone who has similar experience.



L4 Transporter


Can you test with 4.0.3? Also without the PAN, what speeds are you getting?


Not applicable

I had the same problem with threat profiles active (20Mbit/s max on a 2020) that gone with 4.0.3.



I tested at PA 3.1.9, 4.0.1 and 4.0.3 with Anti-virus and anti-spyware profiles, but results were same.

if put into PAN in customer's networks, speed was degradation at PAN3.1.9, 4.0.1 and 4.0.3.

i think it is not a problem of PAN-OS version.



Have you checked the switches for speed and duplex mismatch errors?

What speeds does the report give if done in front of the  Palo Alto?



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