D-Link DWC-1000 User Manual - Page 74

Wireless Controller User Manual rat e limit s e t t in g is 50 p acket s p er s eco n d . Th is field is d is ab led if Rat e Limit in g is d is ab led . Recei ve Li feti me: Sh o ws t h e n u mb er o f millis eco n d s t o wait b efo re t ermin at in g at t emp t s t o reas s emb le t h e M M PDU o r M SDU aft er t h e in it ial recep t io n o f a frag men t ed M M PDU o r M SDU. Rate Li mi t B urs t: Set t in g a rat e limit b u rs t d et ermin es h o w mu ch t raffic b u rs t s can b e b efo re all t raffic exceed s t h e rat e limit . Th is b u rs t limit allo ws in t ermit t en t b u rs t s o f t raffic o n a n et wo rk ab o v e t h e s et rat e limit . Th e d efau lt an d maximu m rat e limit b u rs t s et tin g is 75 p acket s p er s eco n d . Th is field is d is ab led if Rat e Limit in g is d is ab led . S tati on Is ol ati on: W h en t h is o p t io n is s elect ed , t h e A P b lo cks co mmu n icat io n b et ween wireles s clien ts. It s t ill allo ws d at a t raffic b et ween it s wireles s clien t s an d wired d ev ices o n t h e n et wo rk, b u t n o t amo n g wireles s clients . This feature is dis abled by default. • To en ab le M u lt icas t an d Bro ad cas t Rat e Limit in g , click Enabl ed. • To d is ab le M u lt icast an d Bro ad cast Rat e Dis abled, click Di s abl ed. Channel B andwi dth: Th e 802.11n s p ecificat io n allo ws t h e u s e o f a 40 MHz-wide channel in addition to the legacy 20-MHz channel available with o t h er mo d es . Th e 40-M Hz ch an n el en ab les h ig h er d at a rat es b u t leav es fewer ch an n els av ailab le fo r u s e b y o t h er 2.4 GHz an d 5 GHz d ev ices . Th e 40-M Hz o p t io n is en ab led b y d efau lt fo r 802.11a/ n mo d es an d 20 M Hz fo r 802.11b / g / n mo d es . Yo u can u s e t h is s et t in g t o res t rict t h e u s e o f t h e channel bandwidth to a 20-MHz channel. Primary Channel : Th is s etting is ed itab le o n ly wh en a ch an n el is s elected and the channel bandwidth is s et to 40 MHz. A 40 -MHz channel can be cons idered to cons is t of two 20-MHz channels that are contiguous in the freq u en cy d o main . Th ese t wo 20-M Hz ch an n els are o ft en referred t o as t h e Primary an d Seco n dary ch an n els . Th e Primary Ch an n el is u s ed fo r 802.11n clients that s upport only a 20-MHz channel bandwidth and for legacy clien t s . Us e t h is s ettin g t o s et t h e Primary Ch an n el as t h e u pp er o r lo wer 20 MHz channel in the 40-MHz band. 72