Re: Cisco Nexus vs Juniper QFabric

Excellent email but i want to point out that ofcourse u will get minimum
50% discount on pricelist and if cisco is competing u can get easily upto
80% ;-)

Thanks
On Jul 13, 2012 12:23 PM, "Guillermo Ruiz" <gruizesteban_at_gmail.com> wrote:

> I do not have any experience in Arista...but when compared with Cisco and
> Juniper it needs to be considered a serious candidate. Here is a small
> comparision between Juniper and Cisco based in 3 basic elements,
> scalability, power consumption and physical deployment. Sorry for the long
> post...
>
>
> o;?Juniper is intended to be a One Network, flat and any to any
> connectivity. It has 5us or less latency (new Cisco F2 modules are running
> 6us - and are still being validated), a single point of management and runs
> a single version of JunOS (far away from all those different versions of
> IOS n Cisco). Looks really nice...
>
>
>
> The architecture is divided into 3 blocks:
>
>
>
> - QFabric Director: QFX3100 (Requires minimum 2 x Directors)
>
> - QFabric Nodes: QFX3500 (Max. 128 nodes)
>
> - QFabric Interconnect: QFX 3008 (Max. 4 QF Interconnects)
>
>
>
> Let's consider three basic parameters: Physical deployment, scalability
> and power consumption.
>
>
>
> *1) One flat Network: *No, not really
>
>
>
> If you physically deploy the Q-Fabric you will find that it is pretty
> similar to build a Nexus 7K to N5K architecture (spine-leaf topology). You
> will require the same topology...
>
>
<https://c3.csc.com/servlet/JiveServlet/showImage/55117/Spine-Lead+QFabric+vs
+Nexus.jpg>
>
>
>
> A funny tip is that QFabric uses Broadcom BCM56840 Series, known as
> Trident....and it's the same ASIC used in NEXUS 3000!!! At least these is
> used for HPC ;-)
>
>
>
> *2) Scalability*
>
>
>
> Some numbers on this topic. Bear in mind that the Broadcom ASIC consumes
> one switch ID:
>
>
>
> - QFabric Nodes: Maximum of 128 x QFX3500, that makes a total of 128
> switch IDs (there is one ASIC per QFX3500)
> - QFabric Interconnect consumes 24 switch IDs per chassis. Supporting
> a maximum of 4x QF/Interconnects, it gives: 96 switch IDs
>
> - Each Front card consumes 2 switch IDs (2xASICs per front
> linecard): 8 slots x 2= 16
>
> - Each Rear card consumes 1 switch ID (1xASIC per rear
> linecard): 8 x 1= 8
>
>
>
> The maximum number of switch IDs is determined by the Broadcom header of
> the ethernet frame, which is an 8 bit address space: 2^8= 256 switch IDs,
> thus we will have 256 - 128- 96 = 32 IDs left
>
>
>
> B?B?B?32 ??? Oh dear, this does not look scalable enough for some large
data
> centres.
>
>
>
>
>
> *3) Power / Heat dissipation*
>
>
>
> Let's take the official datasheets as Juniper does not have an online
> power calculator as Cisco (which provides a real power consumption). Note
> that real power consumption and heat dissipation will depend on number of
> linecards and ports being used. So this is a theoretical calculation based
> in vendor's datasheet.
>
>
> *Device* *Power* *Heat Dissipation*
>
> QFX3008 (Fabric Interconnect)
> 5.2KW 17.750 BTU/hr
>
> QFX3100 (Fabric Director)
> 476W 1.624 BTU/hr
>
> QFX3500 (Fabric Node)
> 365W 1.250 BTU/hr Nexus 7010 4.7KW 17.200 BTU/hr Nexus 5548UP 390W 1.998
> BTU/hr
>
>
>
> Minimum* Juniper *Configuration: 2 x Fabric Interconnect, 2 x QFabric
> Directors, 4 x QFabric Nodes
>
>
>
> *Power: 12.82 KW*
>
> *Heat: 43.748 BTU/hr*
>
>
>
> Minimum *Cisco *Nexus Configuration: 2 x Nexus 7010, 4 x Nexus 5548UP
>
>
>
> *Power: 10.96 KW*
>
> *Heat dissipation: 42.392 BTU/hr*
>
>
>
> As shown above, Cisco has lower power and heat dissipation than a QFabric
> deployment.
>
>
>
> *And what about the cost of the QFabric? Is it as expensive as a Nexus
> solution?*
>
>
>
> Here is a kit list. As you will see there is no discount applied as this
> is a brand new technology. Maybe I get wrong, but do not expect a 48-60%
> discount as you can find with Cisco.
>
>
> o;?
>
>
> *Item* *Part Code* *Description* *Qty* *Unit List* *Total List* *%
> Discount* *Reseller Buy* *Kitlist* 1
> QFX3008-FAB-2INTC-BNDL QFabric QF/Interconnect Bundle with 2
> QF/Interconnects, 2 16-port 40G I/O modules and 16 QFX-SFP-1GE-T optics
> (Note: AC power cords are sold separately) 1 $470.000 $ 470.000,00 0% $
> 470.000,00 2 QFX3500-48S4Q-ACR QFX3500, 48 SFP+/SFP and 4 QSFP ports,
> redundant dual AC power supply, front to back air flow. 6 $34.000 $
> 204.000,00 0% $ 204.000,00 3 QFX-QSFP-40G-SR4 QSFP+ 40GBase-SR4 40
> Gigabit Optics, 850nm for up to 150m transmission on MMF 48 $5.000 $
> 240.000,00 0% $ 240.000,00 4 QFX3008-FAB-CPE-BNDL QFabric control plane
> ethernet bundle with 8 EX4200-48T, 8 uplink modules and 16 EX-SFP-10GE-USR
> optics (Note: AC power cords are sold separately) 1 $102.400 $ 102.400,00
> 0% $ 102.400,00 5 QFX3008-FAB-DRCTR-BNDL QFabric QF/Director bundle with
> 2 QF/Directors (Note: AC power cords are sold separately) 1 $45.000 $
> 45.000,00 0% $ 45.000,00 6 QFXC08-CABMAN Cable management module for
> QFXC08 chassis 2 $500 $ 1.000,00 0% $ 1.000,00 7 QFXC08-ACTRAY-D A/C
> Power Wiring Tray (Three phase Delta) for QFXC08 Chassis
> ...

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Received on Fri Jul 13 2012 - 13:42:10 ART