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Questions tagged [tcp-offload-engine]

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2
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0answers
131 views

What problems can the use of TOE cause?

What problems can the use of TOE cause? As known, TOE (TCP offload engine) offloads the processing of TCP/IP stack from CPU to the NIC: https://wiki.linuxfoundation.org/networking/toe CPU has more ...
2
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2answers
2k views

Slow upload speed for VMWare virtual machines working via pfSense

We have ProLiant DL360 Gen8 and Gen9 servers running VMWare ESXi 6.0 with virtual machines under various versions of Windows that are routed via pfSense 2.3.4-RELEASE (64-bit) with Open-VM-Tools ...
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2answers
4k views

How does TCP offload NIC cause the TCP checksum to be invalid?

A tcpdump pcap exported and being investigated on another machine with wireshark is showing a lot of invalid TCP checksum messages. This is a known and documented phenomenon when using TCP offload ...
0
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2answers
281 views

How can I see whether tcp-offloading is enabled on a ubuntu server?

I would like to find out if my Ubuntu VM uses tcp-offloading to increase the performance of VXLAN encapsulation. Where can I find this information on my machine?
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0answers
182 views

How to check a given connection has been offloaded to network card

From what I read, some part of the tcp protocol operation can be offloaded from kernel to network card driver thanks to TOE (or GSO, LSO, LRO..). My objective is too find if a given socket has some ...
-1
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1answer
226 views

gro on with ethtool - Ubuntu 10.04 Server LTS

On Ubuntu 10.04 server LTS, I can't enable generic receive offload with ethool (v. 6git) # sudo ethtool -K eth0 gro on Cannot set device GRO settings: Invalid argument If I try instead to set the ...
2
votes
1answer
810 views

What are the imlications of having different TCP Chimey Offload settings?

I have a SQL Server (2008 R2) WSFC on Windows Server 2008 R2 on which I am experiencing some storage latency between the OS and SAN. The SAN admin has noted that the SAN is experiencing very little ...
2
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1answer
485 views

Does the FreeNAS target make use of iSCSI offload cards?

When using a FreeNAS as iSCSI target, would it use the iSCSI offload engine on cards that have it, or is it an initiator-only feature? For clarification, I want to know if a supported iSCSI offload ...
13
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3answers
40k views

Disable TCP-Offloading {completely, generically and easily}

I want to disable tcp-offloading ("TOE") on my debian servers. ethtool -K ..... I have some wishes, though: Integrate it cleanly into debian This reads: no rc.local, I would also like to avoid ...
7
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2answers
6k views

tcpdump: snaplen set to 0 but still get “Packet size limited during capture”?

Due to this problem, I'm going to sniff some packets on the MySQL server backend to see what happens: # tcpdump -vv -s0 -c 100 -i bond0 tcp port 3306 and host 192.168.3.87 -w /home/quanta/3....
1
vote
1answer
351 views

Gigabit NIC with TCP offload and open driver

I'm looking for a gigabit Ethernet adapter with a TCP offload engine that will work nicely with a modern Linux kernel. Due to the way patches and updates are handled, I really need one that has an ...
2
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1answer
1k views

Does DisableTaskOffload disable all related LAN Adapter settings?

I have been getting problems disabling Checksum Offload in a lot of LAN adapters manually. Does setting the DisableTaskOffload value in the registry disable all of the related parameters regardless of ...
4
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6answers
1k views

What causes a delay of 100 ms in initiating an HTTP connection?

Settings: this is a quad CPU machine, plenty strong, not loaded at all (neither CPU nor network), the client is a Windows Server 2008 64bit, the server is a linux box. I have four threads that are ...