Need help to configure my NIC in Redhat

Question

I am trying to set a larger buffer size in my NIC card. I am following the instruction provide by Intel link, but i think it didn't made any changes.

[root@redhat-enterprise-test01 admin]# rmmod e1000;modprobe e1000
[root@redhat-enterprise-test01 admin]# modprobe e1000 TxDescriptors=4096
[root@redhat-enterprise-test01 admin]# ethtool -g p1p1
Ring parameters for p1p1:
Pre-set maximums:
RX:     4096
RX Mini:    0
RX Jumbo:   0
TX:     4096
Current hardware settings:
RX:     256
RX Mini:    0
RX Jumbo:   0
TX:     256
[root@redhat-enterprise-test01 admin]# ethtool -i p1p1
driver: igb
version: 3.2.10-k
firmware-version: 1.5-1
bus-info: 0000:01:00.0

Answer 1

Create a file i.e e1000.conf in /etc/modprobe.d, put some lines like this,

e1000e RxDescriptors=4096

the unload and reload the e1000e module with, i.e rmmod e1000e; modprobe e1000e

Later verify the parameter with cat /sys/module/e1000e/parameters/RxDescriptors.

This is not tested, my e1000e module is builtin.

EDIT

You could also add the following to /etc/modprobe.conf

options e1000 RxDescriptors=4096 <other options>

This is not the preferred way for newer systems but it is backward compatible depending on the version of RHEL you're running.