On Tue, Apr 09, 2013 at 11:48:36AM -0700, joel jaeggli wrote: > On 4/9/13 11:15 AM, Tom Storey wrote: > >Hey all. > > > >A colleague of mine tells me that, if you have a single stackable switch > >(not in a stack obviously) and do not loop the two stacking ports on the > >back using the stacking cable that comes in the box, then you reduce the > >effective throughput of the switch. > > The ex4200's asic has a capacity of 136Gb/s from the front panel > ports which is 100% of line rate across all ports. I don't imagine > connecting the asic back to itself is that useful or usable > topology.
It does make a positive difference to loop back the stack cable on a standalone unit. See this diagram: http://blog.cochard.me/2010/08/juniper-ex-4200-internal-pfe-routing-in.html Connecting from ports 0-23 to 24-47 has to normally cross 3 internal PFEs. If you connect VCP-0 to VCP-1, then it only has to cross 2 PFEs. _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp