[j-nsp] new gigabit ethernet IQ2 pics

[Sean Clarke]

Hi Jonas,

  Considering the IQ2 PIC is oversubscribed 4 to 1 ... there isn't
  much problem I'd say ... you'd be lucky to get much more the 1G
  through it ..

  Of course if you have 4 of them, then you also oversubscribe the
  FPC - but that issue's been known for ages (i.e. 4 x gig PIC's in an
  FPC)
  
Cheers
Sean
--

Not so long ago you wrote : 
JF> Hi,

JF> i just saw that juniper now offers ge iq2 pics with 4 SFP ports on the
JF> M20. 
JF> (http://www.juniper.net/techpubs/hardware/m20/m20-pic/gigabit-ethernet-iq2-qpp.html#gigabit-ethernet-iq2-qpp)
JF> As the M20 has only 3.2 Gbps bandwidth per fpc this means a heavy (i.e.
JF> 4 times) oversubscription thus I really wonder whats the use of that
JF> pic.
JF> Interessting side-note is that Juniper now officially supports 1000baseT
JF> SFP's.

JF> Btw,

JF> there is a docbug at:
JF> http://www.juniper.net/techpubs/hardware/m20/m20-pic/adaptive-two-layer-two.html#adaptive-two-layer-two
JF> This picture is of a M40e/M160 pic.

JF> Regards,
JF> Jonas

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