# Configure Ethernet features Note Ethernet supports a wide range of generic features that don’t require specific configuration. However, a few features that must be configured explicitly are described here. Tab QCS6490 Tab IQ-9075 Tab IQ-8275 Tab IQ-615 - *class* tabincludedirective - ## Configure link speed You can configure link speed from the supported link modes in the `ethtool` command output. ethtool -s [device_name] autoneg [on/off] speed [10/100/1000/2500] duplex [full] Copy to clipboard For example: ethtool -s enP1p5s0f0 autoneg on speed 2500 duplex full Copy to clipboard ## Configure energy efficient Ethernet Note EEE feature is supported only on QEP8121 PHY. You can control EEE by performing certain functions such as verify the status of EEE and enabling or disabling EEE. To configure EEE, do the following: 1. Verify the status of EEE. ethtool --show-eee [interface] Copy to clipboard For example: ethtool --show-eee enP1p5s0f1 Copy to clipboard Sample output: EEE settings for enP1p5s0f1: EEE status: disabled Tx LPI: disabled Supported EEE link modes: 1000baseT/Full 10000baseT/Full 1000baseKX/Full 10000baseKX4/Full 10000baseKR/Full Advertised EEE link modes: Not reported Link partner advertised EEE link modes: Not reported Copy to clipboard 2. Enable EEE. ethtool --set-eee [interface] eee on Copy to clipboard For example: ethtool --set-eee enP1p5s0f1 eee on Copy to clipboard Sample output: EEE settings for enP1p5s0f1: EEE status: enabled - inactive Tx LPI: 17 (us) Supported EEE link modes: 100baseT/Full 1000baseT/Full Advertised EEE link modes: 100baseT/Full 1000baseT/Full Link partner advertised EEE link modes: Not reported Copy to clipboard 3. Disable EEE. ethtool --set-eee [interface] eee off Copy to clipboard For example: ethtool --set-eee enP1p5s0f1 eee off Copy to clipboard Sample output: EEE settings for enP1p5s0f1: EEE status: disabled Tx LPI: 17 (us) Supported EEE link modes: 100baseT/Full 1000baseT/Full Advertised EEE link modes: 100baseT/Full 1000baseT/Full Link partner advertised EEE link modes: Not reported Copy to clipboard ## Verify preconfigured MAC address QPS615 is a PCIe switch on RB3 Gen 2 Development Kit. It doesn’t have an electrically erasable programmable read only memory (EEPROM) to store the MAC address permanently. However, the MAC address is programmed and stored at a persistent path on the device. To verify the preconfigured MAC address, do the following: 1. Verify the configuration of the interface. ifconfig Copy to clipboard Sample output: enP1p5s0f0 Link encap:Ethernet HWaddr XX:XX:XX:YY:YY:YY inet addr:169.254.227.235 Bcast:169.254.255.255 Mask:255.255.0.0 inet6 addr: fe80::533c:8ed6:557:3860/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:19 errors:0 dropped:0 overruns:0 frame:0 TX packets:36 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3416 (3.3 KiB) TX bytes:5559 (5.4 KiB) Interrupt:249 Copy to clipboard The MAC address is stored in the `config.ini` file and is available at `/var/persist` of the device. 2. Verify whether the `config.ini` file is available on the device. ls /var/persist/ Copy to clipboard 3. Verify the content of the `config.ini` file. cat /var/persist/config.ini Copy to clipboard Sample output: #MAC ID configuration, For Test purpose only MDIOBUSID1: 1: MAC_ID01: XX:XX:XX:YY:YY:YY Copy to clipboard ## Retain and store MAC address Whenever the device reboots, the MAC address configuration `config.ini` file in the persistent path `/var/persist` is retained. However, while upgrading the software build, if the **Erase all before download** option is selected, then the configuration file is removed from the device. In such cases, the software assigns a random MAC address. To retain the `config.ini` file and store the MAC address in a location other than `/var/persist`, do the following: 1. Back up the file to a local path. scp root@:/var/persist/config.ini . Copy to clipboard 2. Restore the backed-up file after upgrading the software build. scp config.ini root@:/var/persit/ Copy to clipboard Note When prompted for a password, enter `oelinux123` to authenticate the file transfer via the secure copy protocol (SCP). 3. To store the MAC address in a location other than `/var/persist`, update the EMAC driver software with the new path in the following source code. sources/data-eth/drivers/qps615/src/tc956xmac_main.c ret = kernel_read_file_from_path("/var/persist/config.ini", &data, &size, 1000, READING_POLICY); Copy to clipboard - *class* tabincludedirective - ## Configure link speed You can configure link speed from the supported link modes in the `ethtool` command output. ethtool -s [device_name] autoneg [on/off] speed [10/100/1000] duplex [full] Copy to clipboard For example: ethtool -s eth0 autoneg on speed 1000 duplex full Copy to clipboard - *class* tabincludedirective - ## Configure link speed You can configure link speed from the supported link modes in the `ethtool` command output. ethtool -s [device_name] autoneg [on/off] speed [10/100/1000] duplex [full] Copy to clipboard For example: ethtool -s eth0 autoneg on speed 1000 duplex full Copy to clipboard - *class* tabincludedirective - ## Configure link speed You can configure link speed from the supported link modes in the `ethtool` command output. ethtool -s [device_name] autoneg [on/off] speed [10/100/1000] duplex [full] Copy to clipboard For example: ethtool -s eth0 autoneg on speed 1000 duplex full Copy to clipboard ## Configure PTP You can configure PTP feature on IQ-615 EVK to synchronize clocks throughout a device. To configure PTP, do the following: 1. Download the latest [linux PTP](https://www.linuxptp.org/) source code. 2. Compile the source code to generate ptp4l binary. 3. Download the ptp4l binary and `default.cfg` file to the `/data` directory in IQ-615 EVK. The `default.cfg` file is available in the `configs` directory of the linux PTP source code. ### PTP test setup 1. Connect two IQ-615 EVKs using a LAN cable, where one EVK works as a master and the other as a slave. 2. Run the PTP daemon as master on one IQ-615 EVK. /data/ptp4l -i eth0 -A -m -l 7 Copy to clipboard 3. Run the PTP daemon as slave on another IQ-615 EVK. /data/ptp4l -i eth0 -A -m -l 7 -s Copy to clipboard Note For information about ptp4l arguments, see ptp4l linux man page. ## Configure TSO You can enable TSO feature on IQ-615 EVK to reduce CPU overload, enhance system performance, and improve overall throughput. To enable and verify TSO, do the following: 1. Disable TSO. > > > ethtool -K [device_name] tso off > Copy to clipboard > > > For example: > > > ethtool -K eth0 tso off > Copy to clipboard 2. Enable TSO. > > > ethtool -K [device_name] tso on > Copy to clipboard > > > For example: > > > ethtool -K eth0 tso on > Actual changes: > tx-tcp-segmentation: on > tx-tcp-ecn-segmentation: off [requested on] > tx-tcp-mangleid-segmentation: on > tx-tcp6-segmentation: on > Copy to clipboard 3. Verify TSO status. > > > ethtool -k [device_name] > Copy to clipboard > > > For example: > > > ethtool -k eth0 > Features for eth0: > tcp-segmentation-offload: on > tx-tcp-segmentation: on > tx-tcp-ecn-segmentation: off [fixed] > tx-tcp-mangleid-segmentation: on > tx-tcp6-segmentation: on > Copy to clipboard Last Published: Nov 10, 2025 [Previous Topic Perform Ethernet operations](https://docs.qualcomm.com/bundle/publicresource/80-70022-26/topics/perform-ethernet-operations.md) [Next Topic Troubleshoot Ethernet issues](https://docs.qualcomm.com/bundle/publicresource/80-70022-26/topics/troubleshoot-ethernet-issues.md)