[j-nsp] My first juniper... kinda...

[Peter E. Fry]

> Looking at Juniper again after about 5 years, and I'd like
> some   feedback.  I have a client who has a requirement to
> drive a 100MB link   (so receive 100MB on one interface
> and transmit 100MB on another) on a   1U device that is
> cheap.  I've heard great things about the J series.   
> Based on the specs, a J2320 fits, however it doesn't
> support FE PIMs,   FE EPIMs or GE EPIMS.  It does, however
> , appear to support a GE UPIM.    What is the difference
> between a PIM/EPIM and a UPIM?  Throughput?  Is   the
> latter a layer 2 module only, and you can't route over
> them?

  You need more than the four built-in Ethernet ports?
  I believe the uPIMs are dual PCI/PCI-E, and use a switch
chip to provide additional Ethernet ports with flexible
mapping.  If you don't have a need for hardware (wire speed)
L3 on your LAN, they're a tempting way to cram Ethernet
switching functionality into the router box.  The J2320 has
only PCI for PIM connectivity, but 100Mb/s should be no
problem.
  Now you also have the choice of JUNOS, ScreenOS, and
"JUNOS Software with Enhanced Services" (JUNOS with ScreenOS
features but [from a quick review of the docs] minus the
licensed extras).

Peter E. Fry