Difference between revisions of "Jetson/Network Adapters"

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(Troubleshooting: Added iwlwifi link)
(Troubleshooting)
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A "broadband wireless modem" can be added to [[Jetson TK1]], either as a mini-PCIe card (eg: [http://www.telit.com/telit/Pulsar/en_US.Store.display.735./mini-pcie 3G Modem + GPS combo] (untested)) or as a USB Broadband Wireless dongle.
 
A "broadband wireless modem" can be added to [[Jetson TK1]], either as a mini-PCIe card (eg: [http://www.telit.com/telit/Pulsar/en_US.Store.display.735./mini-pcie 3G Modem + GPS combo] (untested)) or as a USB Broadband Wireless dongle.
  
== Troubleshooting ==
+
== Troubleshooting & Tuning ==
 
If your network adapter is not detected, even when you search through the "dmesg" log, try installing the linux-firmware package then rebooting:
 
If your network adapter is not detected, even when you search through the "dmesg" log, try installing the linux-firmware package then rebooting:
 
  sudo apt-get install linux-firmware
 
  sudo apt-get install linux-firmware
 
  sudo reboot
 
  sudo reboot
 
Also try searching the web for the Linux source code of the driver for your card. For example, many Intel-based Wifi cards can follow the [http://wireless.kernel.org/en/users/Drivers/iwlwifi iwlwifi] page to install appropriate firmware binaries into "/lib/firmware".
 
Also try searching the web for the Linux source code of the driver for your card. For example, many Intel-based Wifi cards can follow the [http://wireless.kernel.org/en/users/Drivers/iwlwifi iwlwifi] page to install appropriate firmware binaries into "/lib/firmware".
 +
 +
=== Dropped Packets ===
 +
To increase TCP/UDP networking performance, increaase the socket buffer sizes (in this case to 32MB, performed at boot):
 +
  sudo sysctl -w net.core.rmem_max=33554432
 +
  sudo sysctl -w net.core.wmem_max=33554432
 +
  sudo sysctl -w net.core.rmem_default=33554432
 +
  sudo sysctl -w net.core.wmem_default=33554432
 +
 +
=== Jumbo Frames ===
 +
Many networking applications are more efficient if they take advantage of packets with large MTU (>1500 bytes).  Jumbo frames are supported on the Jetson's onboard Realtek RTL8111GS NIC.
 +
  sudo ifconfig eth0 mtu 9000

Revision as of 13:14, 19 June 2014

Ethernet

Jetson TK1 comes with a 1Gbps Ethernet adapter (RTL8111GS Realtek 10/100/1000Base-T "Gigabit Ethernet" LAN port) that works right out-of-the-box for local networking. It listens for an IP address from a DHCP server, thus you can plug it directly into your router and it should start working and use internet through your router.

It is also possible to install extra Ethernet ports either as a mini-PCIe card (eg: Dual Gigabit LAN (untested) or as a USB Ethernet dongle.

Wifi / Wireless 802.11

Wifi can be added to Jetson TK1 either as a mini-PCIe card (eg: 802.11ac 5GHz Gigabit Wifi + Bluetooth BLE combo (untested), or 802.11n Wifi + Bluetooth combo (untested)) or as a USB Wifi dongle. Some Wifi adapters have worked fine while others haven't. See the Troubleshooting section if your Wifi card is not being detected.

Wifi adapters known to be working for Jetson TK1

Wifi adapters known not to be working for Jetson TK1

(Probably just requires the correct firmware or kernel module installed)

2G / 3G / 4G Cellular modem

A "broadband wireless modem" can be added to Jetson TK1, either as a mini-PCIe card (eg: 3G Modem + GPS combo (untested)) or as a USB Broadband Wireless dongle.

Troubleshooting & Tuning

If your network adapter is not detected, even when you search through the "dmesg" log, try installing the linux-firmware package then rebooting:

sudo apt-get install linux-firmware
sudo reboot

Also try searching the web for the Linux source code of the driver for your card. For example, many Intel-based Wifi cards can follow the iwlwifi page to install appropriate firmware binaries into "/lib/firmware".

Dropped Packets

To increase TCP/UDP networking performance, increaase the socket buffer sizes (in this case to 32MB, performed at boot):

 sudo sysctl -w net.core.rmem_max=33554432
 sudo sysctl -w net.core.wmem_max=33554432
 sudo sysctl -w net.core.rmem_default=33554432
 sudo sysctl -w net.core.wmem_default=33554432

Jumbo Frames

Many networking applications are more efficient if they take advantage of packets with large MTU (>1500 bytes). Jumbo frames are supported on the Jetson's onboard Realtek RTL8111GS NIC.

 sudo ifconfig eth0 mtu 9000