<![CDATA[As soon as start copying file pfsense port goes down with "no buffer available"]]>We have pfsense 2.2-release on hyper-v with two Realtek PCIe GBE Family adapters.

We have two internal lan interfaces and one wan

as soon as I start copying file from windows desktop connected to lan1 to a windows server connected to lan2 the lan1 interface cannot reach any hosts on lan2, (even though the packets in firewall log are let through). When i login to pfsense and try to ping anything on lan2 i get "no buffer available". Bringing the interface down and then up resolves until next user tries to copy file.
Regular browsing and downloading via WAN works fine.

What can be wrong?

]]>https://forum.netgate.com/topic/80746/as-soon-as-start-copying-file-pfsense-port-goes-down-with-no-buffer-availableRSS for NodeTue, 16 Jun 2026 18:36:46 GMTThu, 05 Mar 2015 15:33:32 GMT60<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 05 Jun 2015 03:05:57 GMT]]>Intel gigabit cards probably your best bet. Easy to find, inexpensive (especially if you want to go the ebay route for used), and reliable.

We sell two different options that'll work great with Windows too.
https://store.pfsense.org/accessories/

]]>https://forum.netgate.com/post/549098https://forum.netgate.com/post/549098Fri, 05 Jun 2015 03:05:57 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 05 Jun 2015 02:17:04 GMT]]>Any decent (tried in Hyper-V) recommendations?

]]>https://forum.netgate.com/post/549095https://forum.netgate.com/post/549095Fri, 05 Jun 2015 02:17:04 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Thu, 04 Jun 2015 19:30:43 GMT]]>Put some real NICs in there. Running a server OS on something with NICs that are low quality for desktop purposes much less more than that isn't likely to end well, especially where doing things like that with Hyper-V.

]]>https://forum.netgate.com/post/549017https://forum.netgate.com/post/549017Thu, 04 Jun 2015 19:30:43 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Thu, 04 Jun 2015 17:38:51 GMT]]>Have you tried another guest OS to performance test the network with?

If I spent more than a few hours trying to debug a hardware issue, I'd just purchase better hardware. I've had too many headaches with RealTek, Broadcom, and any other popular trash network hardware. I only use Intel now, cheap enough and well supported. i210 in my desktop and i350 in my pfsense. Wife has an integrated Intel nic, but if her next motherboard does not, then I'm purchasing an i210 for her also.

]]>https://forum.netgate.com/post/548992https://forum.netgate.com/post/548992Thu, 04 Jun 2015 17:38:51 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Thu, 04 Jun 2015 13:22:58 GMT]]>I am still struggling with this. Anyone else with Realtek PCIe cards and Hyper-V on 2012 R2 experiencing this?

]]>https://forum.netgate.com/post/548921https://forum.netgate.com/post/548921Thu, 04 Jun 2015 13:22:58 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 15:18:22 GMT]]>I agree its junk but it should still work. Does it mean anyone who purchased Realtek cards and tried using them for pfSense is not able to copy large files? The cards work flawlessly with the base OS. How do I troubleshoot this? When in pfSense log can I see what is the error when the interface stops routing. THere must be some clue.

]]>https://forum.netgate.com/post/542825https://forum.netgate.com/post/542825Fri, 08 May 2015 15:18:22 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 15:16:14 GMT]]>SR-IOV is not exactly PCI pass-through. Plus, passing crappy HW through does not make it any less crappy. Realtek -> junk.

]]>https://forum.netgate.com/post/542822https://forum.netgate.com/post/542822Fri, 08 May 2015 15:16:14 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 15:15:07 GMT]]>No, didnt make a difference. As soon as I copy large file the pfSense stops routing

]]>https://forum.netgate.com/post/542821https://forum.netgate.com/post/542821Fri, 08 May 2015 15:15:07 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 15:00:41 GMT]]>After posting the screen shot my last reply I noticed SR-IOV was NOT enabled on the virtual switch the pfSense was using (!!) I will try to re-created the switches and enable it and will re-test. I will advise of the results

]]>https://forum.netgate.com/post/542813https://forum.netgate.com/post/542813Fri, 08 May 2015 15:00:41 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 14:38:09 GMT]]>@doktornotor:

Hmmm, really? Was not aware they've added PCI pass-through to Hyper-V. I frankly don't see that option anywhere. (And SR-IOV needs to by supported by the NIC.)

Yes it is supported in Hyper-V on Windows Server 2012 R2 (see below) and it works quite well, except the problem we are experiencing as described in this thread.

sr-iov.png_thumb
sr-iov.png

]]>https://forum.netgate.com/post/542808https://forum.netgate.com/post/542808Fri, 08 May 2015 14:38:09 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 08:17:34 GMT]]>@zambhoni:

We have pfsense 2.2-release on hyper-v with two Realtek PCIe GBE Family adapters.

Hmmm, really? Was not aware they've added PCI pass-through to Hyper-V. I frankly don't see that option anywhere. (And SR-IOV needs to by supported by the NIC.)

]]>https://forum.netgate.com/post/542712https://forum.netgate.com/post/542712Fri, 08 May 2015 08:17:34 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Fri, 08 May 2015 03:13:56 GMT]]>Thank you for your suggestion, but I increased the MBUF size as suggested and still as soon as I copy file from a network on one interface to a server on another interface the firewall stops allowing packets (I can still connect to the gateway IP to access pfSense admin console) and I need to restart the pfSense server.

here is what the MBUF usage looks like when this happens (see attachment)

To resolve this problem I have to reboot pfSense.

I will add that this does not happen always. Sometimes I can copy files fine and sometimes it happens every time.

Help!

pfSense_stats.png
pfSense_stats.png_thumb

]]>https://forum.netgate.com/post/542676https://forum.netgate.com/post/542676Fri, 08 May 2015 03:13:56 GMT<![CDATA[Reply to As soon as start copying file pfsense port goes down with "no buffer available" on Thu, 05 Mar 2015 23:37:50 GMT]]>Try to increase nmbclusters / MBUF:
https://doc.pfsense.org/index.php/Tuning_and_Troubleshooting_Network_Cards

]]>https://forum.netgate.com/post/525352https://forum.netgate.com/post/525352Thu, 05 Mar 2015 23:37:50 GMT