GS2210 Series User’s Guide
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H A P T E R
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Link Aggregation
17.1 Link Aggregation Overview
This chapt er show s you how t o logically aggr egat e physical links t o for m one logical, higher-
bandw idt h link.
Link aggr egat ion ( t r unking) is t he gr ouping of physical por t s int o one logical higher- capacit y link.
You m ay want t o t r unk por t s if for exam ple, it is cheaper t o use m ult iple low er- speed links t han t o
under- ut ilize a high- speed, but m or e cost ly, single- por t link. How ever, t he m or e por t s you
aggr egat e t hen t he few er available por t s you have. A t r unk gr oup is one logical link cont aining
m ult iple por t s.
The beginning por t of each t r unk gr oup m ust be physically connect ed t o for m a t r unk gr oup.
17.1.1 What You Can Do
•
Use t he Lin k Aggr e ga t ion St a t u s scr een (
) t o view por t s you have
configur ed t o be in t he t r unk gr oup, por t s t hat ar e cur r ent ly t ransm it t ing dat a as one logical link
in t he t r unk gr oup and so on.
•
Use t he Lin k Aggr e ga t ion Se t t in g scr een (
) t o configur e t o enable
st at ic link aggr egat ion.
•
Use t he Lin k Aggr e ga t ion Con t r ol Pr ot ocol scr een (
) t o enable
Link Aggr egat ion Cont r ol Pr ot ocol ( LACP) .
17.1.2 What You Need to Know
The Swit ch suppor t s bot h st at ic and dynam ic link aggr egat ion.
Not e: I n a pr oper ly planned net w or k , it is r ecom m ended t o im plem ent st at ic link
aggr egat ion only. This ensur es incr eased net w or k st abilit y and cont r ol over t he
t r unk gr oups on your Sw it ch.
See
for a st at ic por t t r unking exam ple.
Dynamic Link Aggregation
The Swit ch adheres t o t he I EEE 802.3ad st andar d for st at ic and dynam ic ( LACP) por t t r unking.
The I EEE 802.3ad st andard describes t he Link Aggr egat ion Cont r ol Pr ot ocol ( LACP) for dynam ically
cr eat ing and m anaging t r unk gr oups.
When you enable LACP link aggr egat ion on a por t , t he por t can aut om at ically negot iat e w it h t he
por t s at t he r em ot e end of a link t o est ablish t r unk gr oups. LACP also allow s por t r edundancy, t hat
