Catalyst 6500/5000 l cc dng sn phm ph bin ca Cisco s dng rng ri trong Enterprise Network v Service ProviderChng ta s tm hiu v Supervisor Architecture ca chng . C nhiu option architecture thit k nn Catalyst 6500/5000 . Trong chng ta ch ch yu n option to nn tnh nng layer 3 ca chng . Tnh nng Layer 3 c a vo Catalyst 6500 vi 2 thnh phn chnh sau : - Policy Feature Card ( PFC ) : PFC cung cp bng mch ASICs to nn kh nng layer 3 switching bng hardware , phn loi QoS , ACL filtering .PFC cn c mt b Route processor nhm cung cp thng tin routing v route cache cho c ch layer 3 switching hot ng . Nu khng c b phn Route processor th PFC ch c kh nng thc hin layer 3 / 4 QoS classification v ACL filtering m khng th thc hin c chc nng layer 3 switching . - Mulitilayer switching Feature Card ( MSFC ) : y l b route processor cung cp cho PFC nhm thc hin tnh nng layer 3 switching .Khi ta quyt nh mua Catalyst 6500 th phi ch n Supervisor ca n v kim tra xem c h tr tnh nng layer 3 switching hay khng ? C cc loi supervisor sau y :- Supervisor 1 A - Supervisor 2 - Supervisor 720 Supervisor 1 A with no PFC : y l cu hnh phn cng n gin nht ca mt con Catalyst 6500 , n khng c PFC hoc MSFC . Do i vi supervisor loi ny th khng h tr cc tnh nng layer 3 . Tuy nhin , n cung cp kh nng layer 2 switching ln n 15 triu packet / 1 s ( Mpps ) .Supervisor 1 A with PFC 1 : Supervisor loi ny cung cp thm PFC 1 . PFC 1 ny cung cp thm tnh nng QoS v ACL cho switch . Tuy nhin do khng co MSFC nn khng th thc hin c tnh nng layer 3 switching

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Supervisor 1 A with PFC 1 and MSFC 1 / MSFC 2 : Loi supervisor ny cung cp thm MSFC 1 / MSFC 2 nn c h tr tnh nng layer 3 switching . MSFC 1 chy CPU R5000 tc 200 Mhz , Ram 128 MB , c kh nng route packet vi tc 170Kpps bng Software . MSFC 2 chy CPU R7000 c tc 300Mhz , Ram 512 MB , c kh nng route packet vi tc ln ti 650Kpps bng Software . ( 650,000 packet / s ) .

Supervisor 2 with PFC 2 : So snh vi loi Supervisor 1 A with PFC , Superviosor 2 c tch hp sn PFC 2 vo lun , PFC khng nm tch ri ra . Ngoi kh nng cung cp QoS v ACL , n cn cung cp kh nng layer 2 switching ln n 30Mpps

Do khng c tnh hp thm MSFC nn supervisor 2 loi ny vn cha c tnh nng Layer 3 switching . Mun s dng c tnh nng ny , n phi gn thm MSFC .

i vi Supervisor 2 with PFC 2 , nu mun c thm tnh nng layer 3 switching th phi gn thm MFSC 2 . ( khng xi c loi MFSC 1 ) . Switch Fabric Module : l mt module c gn km vi loi Supervisor 2 tng thm Backplane cho Switch , c th tng t 32Gbps ln 256 Gbps . Distribution Feature Card : DFC cho php kh nng layer 3 swiching local , tc l khng phi gi ln cho supervisor 2 PFC . DFC gm c cc thnh phn tng t nh PFC trn Supervisor 2 Module . Tuy nhin n khng c thnh phn MSFC .( Xi chung vi Supervisor 2 )

Bng local CEF ca DFC s c download t bng Master CEF ca Supervisor 2 module . Supervisor 720 : bao gm cc thnh phn sau - PFC 3- MFSC 3 - Crossbar Switching Fabric cung cp 720 Gbps cho backplane .Ngoi ra n cn cung cp thm cc tnh nng cao cp khc nh : - Hardware based MPLS switching - Hardware based IPv6 layer 3 switching . - Cung cp Hardware h tr NAT v GRE ( generic routing encapsulation )- Backplane bandwidth tng thm .- Maximum throughput l 400Mpps .

Catalyst 6500/5000 c th hot ng 2 ch :

- Hybrid mode : dng hybrid mode tn ti 2 loi operating system khc nhau l CatOS v Cisco IOS . Mi OS s qun l Supervisor v MSFC . CatOS cn c gi tn l Supervisor module Operating System , Cisco IOS cn c gi tn l MSFC operating system . CatOS lm nhim v qun l chc nng Dataplane , Cisco IOS lm nhim v qun l Controlplane . Hybrid mode l mode hot ng mc nh ca Catalyst 6500/5000 . - Native mode : dng native mode , ch c mt h iu hnh duy nht dng qun l Supervisor v MSFC . Native mode lm nhim v qun l tt c cc hot ng ca layer 2 v layer 3 . chy c native mode phi mua thm MSFC gn km vo Supervisor .

i vi Catalyst 6500/5000 , chy ch hybrid mode l ph bin v trong tng lai s vn cn c dng v c mt vi yu cu v hn ch khi s dng native mode . Cu hnh yu cu khi s dng native mode : Nu Catalyst 6500/5000 c Supervisor 1 , cn c thm cc thit b phn cng sau : Policy feature card (PFC-1) Multilayer switching feature card (MSFC-1 or MSFC-2) Supervisor 1 vi 16 MB Flash (default) v 64 MB DRAM (default) . MSFC-1 hoc MSFC-2 phi c t nht 16 MB Flash (default) v 128 MB DRAM (default for MSFC-2) .i vi cc mng ln hn , phc tp hn th nn tng ln 256 MB hoc 512 MB DRAM . A 32 MB PCMCIA flash card.Nu Catalyst 6500/5000 c Supervisor 2 , cn c thm cc thit b phn cng sau : Policy Feature Card (PFC-2) Multilayer Switching Feature Card (MSFC-2) ( Supervisor 2 khng h tr MSFC-1). Supervisor 2 phi c t nht 32 MB Flash v 128 MB DRAM (default) . MSFC-2 phi c t nht 16 MB Flash (default) v 256 MB DRAM (default) . A 32 MB PCMCIA Flash card .Nu Catalyst 6500/5000 c Supervisor 720 th khng cn thm thit b phn cng no gn thm c . iu cn thit nht upgrade ln native mode l cn phi c thm MSFC . Tuy nhin MSFC li khng r v khng cn thit trong a s mi trng LAN ch cn Layer 2 switching v phn loi packet layer 3 , layer 4 . C mt iu quan trng rng nu ta s dng native mode th s phi chu mt s gii hn v mt hardware ln software . Hybrid mode hin ti vn c nhiu tnh nng hn Native mode , tuy nhin Cisco Inc. ang c gng thay th hybrid mode . V th trong tng lai , native mode s l OS chnh cho Catalyst 6500/5000 .Hybride Mode Boot Process :Nhng file quan trng sau y s c MSFC v Supervisor dng boot - Supervisor Imange : y l CatOS c lu trong bootflash ca Supervisor . N lun c k hiu vi prefix l cat6000-sup . V d : cat6000-sup2k8.7-2-2.bin- MSFC boot Loader : Boot loader file ny dng khi ng MSFC , c lu trong bootflash ca MSFC v c prefix l : c6msfc-boot (for MSFC-1) hoc c6MSFC-2-boot (for MSFC-2) . V d : c6MSFC-2-boot-mz.121-8a.E4 . - MSFC image : y l Cisco IOS c lu trong bootflash ca MSFC . N c prefix l c6msfc (for MSFC-1) hoc c6MSFC-2 (for MSFC-2) . V d : c6MSFC-2-jsv-mz.121-8a.E4 .Khi hybrid mode Switch boot ln , switch processor trn Supervisor s c cc thng tin bin mi trng khi ng , ch ra ng dn ti OS dng khi ng . Supervisor module s khi ng cc module phn cng khc , chy system diagnostic , v load CatOS vo Supervisor memory . Tip sau Cisco IOS cng s c load di s iu khin ca MSFC , n s c extract vo memory ca MSFC . Sau khi Supervisor v MSFC boot thnh cng , s tn ti 2 OS , mi OS s qun l cc Module m n kim sot . Native Mode Boot Process : Nhng file quan trng sau s c dng boot : - MSFC boot loader : MSFC 1 vn yu cu phi c boot loader file trong native mode ( MSFC 2 khng cn file ny ) . File ny ging vi file boot loader dng trong hybrid mode . Nu ta xi MSFC 2 th khng cn file ny , tuy nhin file ny li rt cn thit trong trng hp chng mun quay tr li dng ch d Hybrid mode . - Combined Supervisor v MSFC image : Imange ny c cha trong bootflash ca Supervisor . File ny lun c prefix l c6sup . i sau n l 2 k t s ch ra rng loi Supervisor v MSFC no c th tng thch vi nhau . Vd: file c6sup22-jsv-mz.121-11b.E4 l native mode image ca Supervisor 2 v MSFC 2 . Khi native mode switch khi ng , switch processor trn Supervisor s c cc thng tin v bin mi trng khi ng , cho bit ng dn boot OS l u . Supervisor module s load cc module phn cng khc ln , chy system diagnostic v load IOS vo Supervisor memory . Tip sau , MSFC module s hot ng v load IOS vo trong MSFC memory . Lc ny s c 2 Cisco IOS c load ln v hot ng c lp vi nhau