# Network Bonding Going from a one interface setup, to two bonded: Before: ```shell nano /etc/systemd/network/25-wired.network ``` ```shell [Match] Name=eno1 [Network] Address=172.20.20.2/24 Gateway=172.20.20.1 ``` Create the [netdev](https://www.freedesktop.org/software/systemd/man/systemd.netdev.html) bond file `/etc/systemd/network/25-bond1.netdev`. ```shell nano /etc/systemd/network/25-bond1.netdev ``` ```shell [NetDev] Name=bond1 Kind=bond #default is "balance-rr" (round robin) [Bond] #Mode="balance-rr ``` Create network for bond. ```shell nano /etc/systemd/network/25-bond1.network ``` ```shell [Match] Name=bond1 [Network] Address=172.20.20.2/24 Gateway=172.20.20.1 ``` Select interfaces. ```shell nano /etc/systemd/network/20-eno1.network ``` ```shell [Match] Name=eno1 [Network] Bond=bond1 ``` ```shell nano /etc/systemd/network/25-enp5s0.network ``` ```shell [Match] Name=enp5s0 [Network] Bond=bond1 ``` Restart network: ```shell systemctl restart systemd-resolved systemd-networkd ``` Check if functional: ```shell networkctl ``` Before: ```shell IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier unmanaged 2 eno1 ether routable configured 3 enp5s0 ether off unmanaged 4 virbr0 ether no-carrier unmanaged 5 virbr0-nic ether off unmanaged 5 links listed. ``` After: ```shell IDX LINK TYPE OPERATIONAL SETUP 1 lo loopback carrier unmanaged 2 bond0 ether off unmanaged 3 bond1 ether routable configured 4 eno1 ether carrier configuring 5 enp5s0 ether no-carrier configuring 6 virbr0 ether no-carrier unmanaged 7 virbr0-nic ether off unmanaged 7 links listed. ``` **Note**: `systemd` automatically creates bond0, it can be ignored. Status: ```shell cat /proc/net/bonding/bond1 ``` ```shell cat /proc/net/bonding/bond1 john@chin Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: load balancing (round-robin) MII Status: up MII Polling Interval (ms): 0 Up Delay (ms): 0 Down Delay (ms): 0 Slave Interface: eno1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 74:d0:2b:7d:2b:eb Slave queue ID: 0 Slave Interface: enp5s0 MII Status: up Speed: Unknown Duplex: Unknown Link Failure Count: 0 Permanent HW addr: 00:1b:21:63:1f:4d Slave queue ID: 0 ``` **Note**: DNS using `systemd-resolved` config in `/etc/systemd/resolved.conf` ### References --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ramsdenj.com/johns-notes-and-documentation/introduction/introduction-1/network_bonding.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.