How to Use Linux Server Network Bonding for Redundancy and Performance

Episode 79 of Linux Server Admin with Fexingo digs into network bonding — combining multiple physical NICs into a single logical interface for failover and increased throughput. Lucas and Luna walk through the main bonding modes: active-backup for simple redundancy, balance-xor and 802.3ad for load balancing, and balance-alb for adaptive load balancing without switch support. They explain how to configure bonding using the /etc/network/interfaces file and the ifenslave package, verify the bond status via /proc/net/bonding/bond0, and test failover by unplugging cables. The episode covers real-world use cases including critical server uplinks, virtualization hosts, and storage networks. Specific commands and config examples are given throughout. By the end, listeners will know how to set up a bonded interface that survives a NIC or cable failure without dropping connections.

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