I have a poweredge R260 server that i updated the firmware on from iDRAC. However this update failed and now the ethernet ports on the back of the machine seem to be inoperable. The link lights on the ethernet port work fine and show green but then when i check in the OS the interface never appears. Checking the tg3 output from modprobe i get the following:

[    0.155534] pci 0000:06:00.0: [14e4:165f] type 00 class 0x020000 PCIe Endpoint
[    0.155597] pci 0000:06:00.0: BAR 0 [mem 0x4000250000-0x400025ffff 64bit pref]
[    0.155602] pci 0000:06:00.0: BAR 2 [mem 0x4000240000-0x400024ffff 64bit pref]
[    0.155606] pci 0000:06:00.0: BAR 4 [mem 0x4000230000-0x400023ffff 64bit pref]
[    0.155735] pci 0000:06:00.0: PME# supported from D0 D3hot D3cold
[    0.155832] pci 0000:06:00.0: 4.000 Gb/s available PCIe bandwidth, limited by 5.0 GT/s PCIe x1 link at 0000:00:1c.6 (capable of 8.000 Gb/s with 5.0 GT/s PCIe x2 link)
[    0.156333] pci 0000:06:00.1: [14e4:165f] type 00 class 0x020000 PCIe Endpoint
[    0.156396] pci 0000:06:00.1: BAR 0 [mem 0x4000220000-0x400022ffff 64bit pref]
[    0.156401] pci 0000:06:00.1: BAR 2 [mem 0x4000210000-0x400021ffff 64bit pref]
[    0.156406] pci 0000:06:00.1: BAR 4 [mem 0x4000200000-0x400020ffff 64bit pref]
[    0.156534] pci 0000:06:00.1: PME# supported from D0 D3hot D3cold
[    0.200623] pci 0000:06:00.0: Adding to iommu group 12
[    0.200630] pci 0000:06:00.1: Adding to iommu group 12
[    0.832257] tg3 0000:06:00.0: Could not obtain valid ethernet address, aborting
[    0.832655] tg3 0000:06:00.0: probe with driver tg3 failed with error -22
[    0.865201] tg3 0000:06:00.1: Could not obtain valid ethernet address, aborting
[    0.865480] tg3 0000:06:00.1: probe with driver tg3 failed with error -2

I cant seem to update the firmware again as the network interface has disappeared from iDRAC and any of the dell update packages i try give me the following error:

Collecting inventory...
..
Running validation...

This Update Package is not compatible with your system configuration.

The PCI bus can see the NIC but the dell system refuses to acknowledge that it exists and, therefore, refuses any update i try to apply.

Does anyone know how i can rectify this issue?