[j-nsp] Mixed vcf question

[William Johansson]

Hi

Yes as Alexander pointed out the problem is the pfe of the linecards/switches acting as leaves.
The pro of this architecture is that the leaves support local traffic forwarding. The drawback is that the local traffic handling requires local resources in the leaf, ie the pfe which is downloaded from the re.
If you compare it to Cisco Nexus 2000 series acting as access switches in a fex configuration, they don't require their cam/tcam on the switches but with the drawback of no local traffic forwarding.

Br William

> 23 jan. 2016 kl. 07:57 skrev Alexander Marhold <alexander.marhold at gmx.at>:
> 
> Hi James !
> 
> You wrote :
> "For example for the layer3 (max routes supported, etc) why not the one of the QFX5100 acting as routing engine (and spine)?"
> 
> It would not help you at all if the routing engine can hold for example 300k routes and then only 100k can be downloaded to the forwarding engine.
> Which one ? the first 100k ? so this obviously will not work, therefore the LCD ( least common denominator ) 
> It is the forwarding engine or PFE which is in a mixed VCF the limiting factor.
> 
> Regards
> 
> alexander
> 
> -----Ursprüngliche Nachricht-----
> Von: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] Im Auftrag von james list
> Gesendet: Samstag, 23. Januar 2016 07:25
> An: William Johansson
> Cc: Juniper List
> Betreff: Re: [j-nsp] Mixed vcf question
> 
> Hi William
> For example for the layer3 (max routes supported, etc) why not the one of the QFX5100 acting as routing engine (and spine)?
> 
> Is there something stated on the juniper.net site?
> 
> Cheers
> James
> Il 23/Gen/2016 00:32, "William Johansson" <william.johansson83 at gmail.com> ha scritto:
> 
>> Hello
>> 
>> The scalability levels and features in a mixed mode vcf (for all 
>> switches that are part of the vcf) will be lowered to the levels of 
>> the lowest switch model. This means that the numbers of ae's, mac 
>> address table size, routing tables size, cos features etc for the 
>> whole vcf will (in your case) be same as the ex4300.
>> 
>> Br William
>> 
>> 
>> Skickat från min iPad
>>> 21 jan. 2016 kl. 16:22 skrev james list <jameslist72 at gmail.com>:
>>> 
>>> Hello experts,
>>> 
>>> a question regarding a mixed VCF environment with QFX5100 as spine 
>>> and
>>> QFX5100/EX4300 as leaf.
>>> 
>>> 
>>> 
>>> My customer question is: what are the Layer2/Layer3 maximum 
>>> performance expected to be reached in a mixed environment ?
>>> 
>>> 
>>> 
>>> The one reached by QFX5100 or the one reached by EX4300 or something
>> else ?
>>> 
>>> 
>>> 
>>> I imagine that if traffic enter on QFX and exit on QFX the 
>>> performance
>> are
>>> the one from QFX, if enter on QFX and exit on EX the performance are 
>>> the one from EX.
>>> 
>>> 
>>> 
>>> For performance I mean max throughput, max switching capacity, 
>>> maximum supported routes, etc..
>>> 
>>> 
>>> 
>>> Am I correct ?
>>> 
>>> Any reference url or experience ?
>>> 
>>> 
>>> 
>>> Thank you in advance
>>> 
>>> 
>>> 
>>> Cheers
>>> 
>>> James
>>> _______________________________________________
>>> juniper-nsp mailing list juniper-nsp at puck.nether.net 
>>> https://puck.nether.net/mailman/listinfo/juniper-nsp
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