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network issues with Dell Broadcom interfaces?

Experiencing “Copper Link Down” messages with increased network load on Dell R and M Series servers?

Then you might want to look into this thread.

There is a known issue with the bnx2 driver used on the Linux platform that might cause the network card to become inactive. The problem is caused by the drivers MSI (Message Signaled Interface) option.

The two suggested solutions to this problem are;

1. Disable the msi option in the modprobe.conf file by adding the following rule;
options bnx2 disable_msi=1 (Recommended)

2. Load the latest dell driver that disables the msi-x option in the driver itself.

Please read these threads carefully before you decide this problem is the one you might be experiencing.

How to detect the problem on OracleVM / OEL.

1. Make sure the Link-led is lid on the back op the physical machine.
2. Run the ethtool eth# -t to view its current state
3. Make sure the ethtool reports a Link-Down

Applying the fix use the following steps;

1. Logon to the OracleVM Dom0 / OEL / Other Linux box.
2. vi /etc/modprobe.conf
3. Add the following line below alias eth0 bnx2
options bnx2 disable_msi=1
4. Save and quit vi :sq
5. Reinit the module using the following command.
modprobe bnx2
6. Verify the setting using the following command.
modinfo bnx2
The following rule should be listed.
parm: disable_msi:Disable Message Signaled Interrupt (MSI) (int)

Hope this fix resolves the problem for you!