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Systems & Data Center · Intermediate

Network Bonding

Combining multiple Linux network interfaces into one logical interface for redundancy or increased throughput.

Definition

Linux bonding modes include 0 balance-rr, 1 active-backup, 4 802.3ad (LACP) and 6 balance-alb. Mode 4 requires matching switch configuration. Bonds are typically created with nmcli.

Example

nmcli con add type bond ifname bond0 bond.options mode=active-backup creates a failover bond.

Exam tip

802.3ad (mode 4) requires LACP on the switch; active-backup (mode 1) needs no switch support.

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