On 4-Jan-08, at 12:00 PM, Peter E. Fry wrote:
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?
Oh jeeze - I skimmed right past the part that said the 2350 had 4 on-
board 10/100/1000 RJ45 ports. Thanks for mentioning that.
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.
Would two of the onboard ports each do wirespeed 100Mb, full duplex?
Are the onboards equivalent to PCI or are they equivalent to PCI-E?
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).
I think I'd just go with JunOS, but that's another ball of wax. I may
do JunOS on one and ScreenOS on the other, but I have to look at the
difference between the two in order to figure that out.
Is there a matrix somewhere that lists the differences between Screen
and Jun? As I understand it, Screen revolves more around security,
while Jun revolves more around Layer 3, but please - correct me if I'm
wrong.
Peter E. Fry
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