As a networking neophyte, I'm having a bit of trouble understanding some (probably) basic concepts on switching backplanes... I was hoping someone could enlighten me on a couple topics...
1: What's the difference between "forwarding rate" and "backplane bandwidth"? Are they connected?
2: What exactly do "fabric enabled" line cards get you in a 6500 series switch? I noticed that the fabric enabled line cards are twice the price of non-fabric enabled line cards... Does this mean that the line card shares the aggregate backplane bandwidth available on the SUP, thus enabling, say, a 48 port card (with GigE ports) to forward packets at "line speed" (i.e. all 48 ports spewing a gigabit of traffic simultaneously?
3: I notice that other switches out there say they have a higher forwarding rate than similar Cisco switches. For example, the HP Procurve 2810-48G claims to forward packets at 71.4 Mpps at 64 bytes while the 3750 with 48 10/100/1000 ports only forwards at 38.7 Mpps. The 3750 is like $15,000 or something, the HP is like $3,000. I know the 3750 has a few more features, but how can HP claim to forward faster than such an expensive Cisco equivalent (while sort-of equivalent)?
Thanks for any insight!
Its a SUP 720, not 750..
And the 48 port linecards ARE the dCEF 720 cards. dCEF 720 refers to one of the 4 families of linecards. It refers to capability.
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