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C613-50100-01 REV C Command Reference for x930 Series 635
AlliedWare Plus™ Operating System - Version 5.4.6-1.x
Link Aggregation
Commands
Introduction
Overview This chapter provides an alphabetical reference of commands used to configure a
static channel group (static aggregator) and dynamic channel group (LACP
channel group, etherchannel or LACP aggregator). Link aggregation is also
sometimes referred to as channeling.
NOTE: AlliedWare Plus™ supports IEEE 802.3ad link aggregation and uses the Link
Aggregation Control Protocol (LACP). LACP does not interoperate with devices that use
Port Aggregation Protocol (PAgP).
Link aggregation does not necessarily achieve exact load balancing across the links.
The load sharing algorithm is designed to ensure that any given data flow always goes
down the same link. It also aims to spread data flows across the links as evenly as
possible.
Link aggregation hashes one or more of the source and destination MAC address, IP
address and UDP/TCP ports to select a link on which to send a packet. So packet flow
between a pair of hosts always takes the same link inside the Link Aggregation Group
(LAG). The net effect is that the bandwidth for a given packet stream is restricted to the
speed of one link in the LAG.
For example, for a 2 Gbps LAG that is a combination of two 1 Gbps ports, any one flow
of traffic can only ever reach a maximum throughput of 1 Gbps. However, the hashing
algorithm should spread the flows across the links so that when many flows are
operating, the full 2 Gbps can be utilized.
For a description of static and dynamic link aggregation (LACP), and configuration
examples, see the Link Aggregation Feature Overview and Configuration Guide.
Command List •“channel-group” on page 637
•“clear lacp counters” on page 639
•“debug lacp” on page 640
•“lacp global-passive-mode enable” on page 641
•“lacp port-priority” on page 642
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