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FCoE vs iSCSI

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Transition to 10 Gigabit Ethernet is Now

Multi-Core CPU architectures allowing bigger

and multiple workloads on the same machine

Server virtualization driving the need for more

I/ bandwidth per server 

!rowing need for network storage driving the

demand for higher network bandwidth to the

server 

"#!$ %&' on server Motherboards (%oM) in*"C+#,

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Cisco Data Center Ethernet:What and Why

Cisco®

 Data Center EthernetDCE!" is a Cisco #too$bo%& o'

Ethernet enhance(ents)

Cisco DCE enhance(ents are

standards*based)

Cisco DCE enhance(ents ares+,,orted by ecosyste(

,artners)

-ene'its o' Cisco DCE:

•Enab$es the .ni'ied Fabric to

acco((odate /N storage andc$+stering a,,$ications

• 2igh s,eed /oss$ess trans,ort

• Congestion (anage(ent

• 3ossibi$ity o' $arger /ayer 4

do(ains

U   n  i   f   i   e  d    -   a  b  r  i   c   a  n  d    I    /     

Storage

'etwork

Mgmt

'etwork

Cluster 

.

Cluster" ackup

'etwork

Unified

abric

Unified

abric

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Data Center Ethernet

Feat+re 5 Standard -ene'it

3riority F$ow Contro$ 3FC"I$$$ 0#.1"*bb

Enab$e (+$ti,$e tra''ic ty,es to share a co((onEthernet $in6 witho+t inter'ering with each other 

-andwidth 7anage(entI$$$ 0#.1"*az

Enab$e consistent (anage(ent o' 8oS at thenetwor6 $eve$ by ,roviding consistent sched+$ing

Congestion 7anage(entI$$$ 0#.1"*au

End*to*end congestion (anage(ent 'or/4 networ6

Data Center -ridgingE%change 3rotoco$ 2C3"

7anage(ent ,rotoco$ 'or enhanced Ethernetca,abi$ities

/4 7+$ti,ath 'or .nicast and 7+$ticast

Increase bandwidth (+$ti,$e active ,aths)No s,anning tree $arger /4 do(ain 'or (odern

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Co$ enefits

FC over Ethernet FCoE"

7a,,ing o' FC 'ra(es

over Ethernet

Enab$es FC to r+n

on a $oss$ess Data CenterEthernet networ6

Wire Server 9nce

Fewer cab$es and ada,ters

So'tware 3rovisioning o' I59

Intero,erates withe%isting SNs

No gatewaystate$ess

Fibre

Channe$

Ethernet

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iSCSI Co$

iSCSI and FCoE ; an aside

Enet Header

FCS

IP

TCP

iSCSI Header

iSCSI DATA

(variable)

Enet Header

FCS

FCoE Header

EOF

FC Frame

(variable)

Up to 2112

iSCSI ,ac6et <

SCSI c(ds =

data in TC35I3

,ac6et

., to >1?0 -

FCoE Fra(e

., to 41?0 -

Enca,s+$ated

FC Fra(e

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Networ6 Stac6 Co(,arison

$thernet

IP

4CP

iSCSI

CIP

Co$

C

CP

SCSI

Ph5sical 6ire

SCSI iSCSI CIP Co$ C

Less Overhead 

than

FCIP or iSCSI 

Less Overhead 

than

FCIP or iSCSI 

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iSCSI

Standard

Ethernet NIC

So'tware Initiator 

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FCoE

Ethernet NIC

2ost -+s da,ter 

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iSCSI Co$

iSCSI and FCoE

@ -$oc6 $eve$ storage ,rotoco$@ Ao+tab$e ; .ses TC35I3@ So'tware Driver5Initiator avai$ab$e@ C3. Intensive ; C3. B so'tware@ 3ri(ari$y 1GE

@ 3ri(ari$y +sed 'or $ower*s,eed I59@ .s+a$$y chea,er than FC3 or FCoE@ 9'' the she$' NICs@ TC35I3 9''$oad Engine T9E" cards

'or higher ,er'or(ance@ Wor6s with DCE

@ Sca$ing iss+e at 10G and beyond

N9T2ING WA9NG with iSCSI

@ -$oc6 $eve$ storage ,rotoco$@ Not ro+tab$e@ Ae+ires a CN today"@ /4 on$y ,rotoco$@ Ae+ires 10G DCE

@ DCE a$$ows 'or di''erentiated c$asso' service

@  do,tion ra,id$y increasing@ -+i$t 'or 2ardware integration@ 7ore E''icient ,rotoco$@ 2igh*,er'or(ance invest(ent

,rotection o,tion 'or e%isting FCenviron(ents

Where $arger hardware vendors are

concentrating e''orts

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FCoE enab$er: 7DSCritica$ E$e(ent o' Aea$ Wor$d 7 De,$oy(ent

abric Scalabilit5 and PerformanceAesi$ient high ,er'or(ance 'abric to s+,,ort$arge dense 7 environ(ents

Performance Monitoring and4rending7*gran+$ar (anage(ent and tro+b$eshooting

*ualit5 of Service (*oS)7*gran+$ar ,o$icy ,rovisioning

7S&'s Isolate ault 2omainsIncrease avai$abi$ity si(,$i'y tro+b$eshootingi(,rove sec+rity B co(,$iance

S&'abric

4ier "

4ier .

4ier 8

VSAN – Tier 1

VSAN – Tier 2

VSAN – Tier 3

Mobilit5 with Securit5Wire*s,eed encry,tion ,rotects data intransit and 7s d+ring (igration

    7    7    7     7

    7    7    7    7

    7    7    7     7

    7    7    7    7

    7    7    7    7

    7    7    7    7

'PI7

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