Author Topic: Very low upload rate for server  (Read 434 times)


  • Zen Apprentice
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Very low upload rate for server
« on: April 16, 2019, 04:58:52 pm »
Hello everyone ! I installed Zentyal on a Dell Powerdge 860 server which has one external (eth0) and one internal network (eth1) interfaces and I am using DHCP on (eth1) is the internet server, domain controller and file sharing, but I am having a very low upload rate for the server something between 6MB and 9MB, I use a Cisco Giga switch and Cat6 cable.
« Last Edit: April 16, 2019, 05:01:00 pm by onlitec »


  • Zen Apprentice
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Re: Very low upload rate for server
« Reply #1 on: April 26, 2019, 07:23:48 am »
Hi, I had a similar problem that was produced by my network card, this network card had problems with the checksum offloading.

Try the following commands:

Check the current configuration:
# ethtool --show-offload eth0

Temporarily disable the offloading:
# ethtool -K eth0 tx off tso off gso off

check the changes:
# ethtool --show-offload eth0

Repeat all steps for each network interface

Check the upload rate

If the problem is solved you must make this configuration permanent by modifying the network module script in the hooks folder, a more detailed description can be found in: