# Perform Ethernet operations The mezzanine board adds support for additional Ethernet interfaces, each accessible through standard RJ45 connectors. These interfaces enable robust, high-bandwidth connectivity suited to complex data transfer needs and multi-device environments. The additional Ethernet ports facilitate use cases such as server networking, IoT aggregation, and high-speed local communication. Consider the following points about Ethernet interfaces: - Alongside the mainboard’s Ethernet connection, three supplemental ports are available on the mezzanine board. - Standard RJ45 connectors activate each interface. - All Ethernet interfaces are enabled by default from device bootup. ## Dragonwing IQ-8275 mainboard The following table lists the mainboard Ethernet component. Mainboard Ethernet | Board/card | Component | Supported speeds | Validated on | Connector | | --- | --- | --- | --- | --- | | IQ-8275 | QEP8121 PHY | 10M/100M/1G/2.5G | Dragonwing IQ-8275 EVK | RJ45 | For more information on mainboard Ethernet enablement, see the [Qualcomm Linux Ethernet Guide](https://docs.qualcomm.com/doc/80-80021-26/topic/perform-ethernet-operations.html). ## Mezzanine board or card for Ethernet The following table lists the mezzanine board or card components for Ethernet. Mezzanine board or card: Ethernet | Board/card | Component | Supported speeds | Validated on | Enabled by | | --- | --- | --- | --- | --- | | Mezzanine card | QEP8121 PHY | 10M/100M/1G/2.5G | Dragonwing IQ-8275 EVK with mezzanine kit | RJ45 connector | | QPS615 PCIe switch | AQR113 PHY | 10M/100M/1G/2.5G/5G/10G | Dragonwing IQ-8275 EVK with mezzanine kit | RJ45 connector | | QPS615 PCIe switch | QEP8121 PHY | 10M/100M/1G/2.5G | Dragonwing IQ-8275 EVK with mezzanine kit | RJ45 connector | ## Manage network interfaces Perform basic operations such as configuring addresses, viewing the status of links, monitoring connections, and debugging connection failures using various tools. ### Verify data connectivity To verify connectivity between the device interface and the interface that’s connected remotely, run the following command: ping Copy to clipboard Note The client IP address must be in the same subnet as that of the device IP address. **Sample output** The following sample output shows the network connectivity of the Dragonwing IQ-8275 EVK with mezzanine kit to the host PC: > > > sh-5.2# ping 169.254.198.80 > PING 169.254.198.80 (169.254.198.80) 56(84) bytes of data. > 64 bytes from 169.254.198.80: icmp_seq=1 ttl=64 time=0.561 ms > 64 bytes from 169.254.198.80: icmp_seq=2 ttl=64 time=1.58 ms > 64 bytes from 169.254.198.80: icmp_seq=3 ttl=64 time=1.88 ms > 64 bytes from 169.254.198.80: icmp_seq=4 ttl=64 time=1.75 ms > 64 bytes from 169.254.198.80: icmp_seq=5 ttl=64 time=1.84 ms > 64 bytes from 169.254.198.80: icmp_seq=6 ttl=64 time=1.09 ms > ^C > --- 169.254.198.80 ping statistics --- > 6 packets transmitted, 6 received, 0% packet loss, time 5011ms > rtt min/avg/max/mdev = 0.561/1.450/1.883/0.476 ms > Copy to clipboard ### Configure the NIC settings To view the network interface controller (NIC) parameters and configure the NIC settings such as speed, port, and auto-negotiation, run the following command: ethtool Copy to clipboard **Sample output** The following sample output shows the status of a link: > > > ethtool eth0 > Settings for eth0: > Supported ports: [ ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > 2500baseT/Full > Supported pause frame use: Symmetric Receive-only > Supports auto-negotiation: Yes > Supported FEC modes: Not reported > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > 2500baseT/Full > Advertised pause frame use: Symmetric Receive-only > Advertised auto-negotiation: Yes > Advertised FEC modes: Not reported > Link partner advertised link modes: 100baseT/Full > 1000baseT/Full > 2500baseT/Full > Link partner advertised pause frame use: Symmetric Receive-only > Link partner advertised auto-negotiation: Yes > Link partner advertised FEC modes: Not reported > Speed: 2500Mb/s > Duplex: Full > Auto-negotiation: on > master-slave cfg: preferred slave > master-slave status: slave > Port: Twisted Pair > PHYAD: 24 > Transceiver: external > MDI-X: on (auto) > Supports Wake-on: g > Wake-on: d > Current message level: 0x0000003f (63) > drv probe link timer ifdown ifup > Link detected: yes > Copy to clipboard ### Configure the network interface To assign an address to a network interface and configure the interface with additional parameters like MTU, run the following command: ip Copy to clipboard For more information about the `ip` command, see [ip(8) - Linux manual page](https://man7.org/linux/man-pages/man8/ip.8.html). For more information about configuring the network interface, see [Bring up Ethernet](https://docs.qualcomm.com/doc/80-80021-26/topic/bring_up-ethernet.html#bringup-qcs9075). **Sample output** The following sample output shows the network interface information: > > > ip a > lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 > link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 > inet 127.0.0.1/8 scope host lo > valid_lft forever preferred_lft forever > inet6 ::1/128 scope host noprefixroute > valid_lft forever preferred_lft forever > > end0: mtu 1500 qdisc mq state UP group default qlen 1000 > link/ether 8c:fd:f0:ae:cb:44 brd ff:ff:ff:ff:ff:ff > altname enx8cfdf0aecb44 > inet 192.168.245.11/24 brd 192.168.245.255 scope global dynamic end0 > valid_lft 68211sec preferred_lft 68211sec > inet6 fe80::f3e9:48b1:6bf6:8f82/64 scope link noprefixroute > valid_lft forever preferred_lft forever > > eth0: mtu 1500 qdisc mq state DOWN group default qlen 1000 > link/ether 8c:fd:f0:ae:cb:46 brd ff:ff:ff:ff:ff:ff > altname enx8cfdf0aecb46 > > enp5s0f0: mtu 1500 qdisc mq state DOWN group default qlen 1000 > link/ether 10:22:33:44:55:66 brd ff:ff:ff:ff:ff:ff > altname enx102233445566 > > enp5s0f1: mtu 1500 qdisc mq state DOWN group default qlen 1000 > link/ether 10:22:33:44:55:66 brd ff:ff:ff:ff:ff:ff > > docker0: mtu 1500 qdisc noqueue state DOWN group default > link/ether 5e:70:16:a1:cd:07 brd ff:ff:ff:ff:ff:ff > inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 > valid_lft forever preferred_lft forever > Copy to clipboard ### Analyze the network traffic To analyze the network traffic by intercepting and displaying packets that are created or received by a network interface, run the following command: tcpdump Copy to clipboard **Example** To analyze the network traffic, run the following command: tcpdump -i any -s 0 -w /data/tcpdump.pcap Copy to clipboard ### Identify and read the network route A routing table has the parameters necessary to identify and read the network route. To retrieve information on a routing table, run the following command: ip r s Copy to clipboard For more information about the `ip` command, see [ip(8) - Linux manual page](https://man7.org/linux/man-pages/man8/ip.8.html). **Sample output** The following sample output shows the retrieval of the IP routing table: > > > ip r s > default via 192.168.245.1 dev eth0 proto dhcp src 192.168.245.31 metric 10 > default via 192.168.245.1 dev eth0 proto dhcp src 192.168.245.31 metric 101 > 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown > 192.168.245.0/24 dev end0 proto kernel scope link src 192.168.245.11 > 192.168.245.0/24 dev end0 proto kernel scope link src 192.168.245.11 metric 100 > 192.168.245.0/24 dev eth0 proto kernel scope link src 192.168.245.31 metric 101 > 192.168.245.1 dev eth0 proto dhcp scope link src 192.168.245.31 metric 10 > Copy to clipboard ## Next steps - [Perform Bluetooth GAP functions.](https://docs.qualcomm.com/doc/80-80022-44/topic/iq8-ifp-ug-bt-gap.html#perform-bluetooth-gap-functions) - [Configure Wi-Fi.](https://docs.qualcomm.com/doc/80-80022-44/topic/iq8-ifp-ug-config-wifi.html#configure-wifi) - [Set up the LVDS display panel.](https://docs.qualcomm.com/doc/80-80022-44/topic/iq8-ifp-ug-set-up-display.html#set-up-lvds-display-panel) Last Published: May 12, 2026 [Previous Topic Validate USB and PCIe](https://docs.qualcomm.com/bundle/publicresource/80-80022-44/topics/iq8-ifp-ug-validate-usb-and-pcie.md) [Next Topic Perform Bluetooth GAP functions](https://docs.qualcomm.com/bundle/publicresource/80-80022-44/topics/iq8-ifp-ug-bt-gap.md)