# Network Reliability With iwlwifi

My network keep dropping out using the iwlwifi driver, adding the following kernel parameters fixed the problem.

To get rid of "*iwlwifi 0000:03:00.0: DMA: Out of SW-IOMMU space for 4096 bytes*" errors I increased the buffer size.

```shell
swiotlb=32768
```

I was getting the following PCI error.

```shell
kernel: pcieport 0000:00:1b.0: PCIe Bus Error: severity=Corrected, type=Physical Layer, id=00d8(Receiver ID)
kernel: pcieport 0000:00:1b.0:   device [8086:a167] error status/mask=00000001/00002000
kernel: pcieport 0000:00:1b.0:    [ 0] Receiver Error         (First)
```

Turning off active power management got rid of the error.

```shell
pcie_aspm=off
```


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