showstack / glossary / link-aggregation
Link aggregation (LAG / LACP) 鏈路聚合
Making several physical cables behave as one logical link, for redundancy and for total throughput. The switch picks a physical link per flow by hashing addresses or ports, so every packet of one conversation follows one cable and arrives in order.
中文
讓多條實體線路表現成一條邏輯鏈路，用於備援與提升總頻寬。交換器以位址或連接埠雜湊為每個流量選定一條實體線路，因此同一段對話的封包都走同一條線，順序得以維持。
Regional usage
| Where | Term | Note |
|---|---|---|
| UK / US | LAG / LACP / port channel / bonding | |
| HK / TW | 鏈路聚合 / 埠聚合 |
Easy to get wrong
Aggregation is resilience always and bandwidth only sometimes. A single 1.4 Gbit/s stream across two 1 Gbit/s links does not work; it picks one link and drops the excess.
Next to this
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Sources
- IEEE 802.1AX Link Aggregation — IEEE primary
Understand the mechanism
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