b/w limit M320 FPC2

Folks,

FPC2 nominally do 10G, and then nominally 2.5G per PIC.
Think about the 4xGE PIC and 4 of them on a FPC2. How
'dynamic' is that setup going to be, and what is the hard
limit for one of these PICs under these circumstances?

Thanks,
Alexander

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DEAR ALL 
Is there is any one preparing this exam so we can share the
LAB and
resources plus material !!



Best regards,

Adnan habib





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On Thu, Apr 06, 2006 at 04:11:11PM +0200, Alexander Koch
wrote:
> Folks,
> 
> FPC2 nominally do 10G, and then nominally 2.5G per PIC.
> Think about the 4xGE PIC and 4 of them on a FPC2. How
> 'dynamic' is that setup going to be, and what is the
hard
> limit for one of these PICs under these circumstances?

I could tell you what I've seen from M160 FPC2's, but I
assume on M320 it 
is going to be completely different.

The story I've heard is that outside of the new FPC4s for
OC768/etc (which 
have true 40G asics), the M320/T series architecture only
has 20G 
forwarding ASICs. Thus a T640 FPC3 is 2x20G, a T320/M320
FPC3 is 1x20G, 
but FPC2 and FPC1s are also 1x20G (also each FPC has its own
Internet 
Processor type asics, and does distributed IP lookups). This
is completely 
different from the M160 architecture, which is just a dumb
FPC talking to 
4 individual SFMs, each of which provide 3.2Gbps of capacity
into the FPC 
(so that when all 4 SFMs are operating you get 12.8Gbps of
capacity into 
an FPC2).

Can anyone confirm if the M320 FPC2's actually make a full
20G of 
bandwidth (or close to it minus overhead) available, so that
filling it 
with PB-4GE PICs is not oversubscribing it?

-- 
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as
GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41
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Hello,

what is it I have to do to get the answer on this one? I can
open a case for that, but that path I did not want to go for
potentially obvious reasons. I am surely willing to go that
way, if it is the only one.

Regards,
Alexander

On Thu, 6 April 2006 16:11:11 +0200, Alexander Koch wrote:
> Folks,
> 
> FPC2 nominally do 10G, and then nominally 2.5G per PIC.
> Think about the 4xGE PIC and 4 of them on a FPC2. How
> 'dynamic' is that setup going to be, and what is the
hard
> limit for one of these PICs under these circumstances?
> 
> Thanks,
> Alexander

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Hi,

According to the documentation you can  use  PB-4GE-SFP in
FPC2 but my 
be bandwith will be oversubscribed. I think it is like
M5/M7i, you can 
put 4 1GE PICs but can't use full 4Gbps, because 
throughput rate is 
3.2Gbps full duplex.

Regards,
George



Alexander Koch wrote:

>Hello,
>
>what is it I have to do to get the answer on this one? I
can
>open a case for that, but that path I did not want to go
for
>potentially obvious reasons. I am surely willing to go
that
>way, if it is the only one.
>
>Regards,
>Alexander
>
>On Thu, 6 April 2006 16:11:11 +0200, Alexander Koch
wrote:
>  
>
>>Folks,
>>
>>FPC2 nominally do 10G, and then nominally 2.5G per
PIC.
>>Think about the 4xGE PIC and 4 of them on a FPC2.
How
>>'dynamic' is that setup going to be, and what is
the hard
>>limit for one of these PICs under these
circumstances?
>>
>>Thanks,
>>Alexander
>>    
>>
>
>_______________________________________________
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>h
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>
>  
>

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Alexander,

          there  is  no such restriction on M320 and T-Serie
platforms
          for  4xGE PIC since the IO ASIC is different. We
have two on
          one  FPC  Type 2 and each of them serves 2 PIC
Slots. The IO
          asic  is  designed  to  deliver  10G  further 
into  the PFE
          complex.  So  you can fill up all 4 pic slots and
should get
          full b/w throughput.

          Josef



Wednesday, April 12, 2006, 1:21:24 PM, you wrote:

AK>    
AK>    
AK> Hello,
AK>  
AK>  what is it I have to do to get the answer on this
one? I can
AK>  open a case for that, but that path I did not want
to go for
AK>  potentially obvious reasons. I am surely willing to
go that
AK>  way, if it is the only one.
AK>  
AK>  Regards,
AK>  Alexander
AK>  
AK>  On Thu, 6 April 2006 16:11:11 +0200, Alexander Koch
wrote:
 >> Folks,
 >>
 >> FPC2 nominally do 10G, and then nominally 2.5G per
PIC.
 >> Think about the 4xGE PIC and 4 of them on a FPC2.
How
 >> 'dynamic' is that setup going to be, and what is
the hard
 >> limit for one of these PICs under these
circumstances?
 >>
 >> Thanks,
 >> Alexander
AK>  
AK>  _______________________________________________
AK>  juniper-nsp mailing list juniper-nsppuck.nether.net
AK>  h
ttp://puck.nether.net/mailman/listinfo/juniper-nsp
AK>   
AK>   
AK>    
 
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