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

[Alexandre Snarskii]

On Fri, Jan 04, 2008 at 02:07:14PM -0500, Jason Lixfeld wrote:
> > 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?   

I think so. Our first J-series is 6350, and it was able to deliver 
about ~600Mbit out/~100 Mbit in, with CPU Idle at ~50%, 
so, as always, Juniper does what declared in datasheets :) 

The same datasheet (http://www.juniper.net/products/jseries/dsheet/100206.pdf)
quotes 2320 as able to do 400Mbps at IMIX, and that well over your
requirement of 100mbit/full duplex: 

Specification                      J6350     J4350     J2350     J2320
Maximum Performance and Capacity
JUNOS version support            JUNOS 8.0 JUNOS 8.0 JUNOS 8.4 JUNOS 8.4
Forwarding performance             2 Gbps+   1 Gbps+  750 Mbps+ 600 Mbps+
(large packets)
Forwarding performance (IMIX)      1 Gbps  600 Mbps  500 Mbps   400 Mbps

> Are the onboards equivalent to PCI or are they equivalent to PCI-E?

Again, not sure about 2320, but on 6350 onboard ports are PCI-X: 

pcib2: <Intel PXH6700 PCI Express to PCI-X bridge> at device 0.0 on pci1
pci2: <PCI bus> on pcib2
pci2: <MARVELL PCI-X Dual GBE Controller> at 2.0 irq 11
pci2: <MARVELL PCI-X Dual GBE Controller> at 3.0 irq 10