Depends what you are trying to do... Do you need full routing tables? If 100k routes are enough you may want to try and look at some trident 2 based kit like the qfx5100 from juniper.
--Andrew Sent from a mobile device > On 17 Jan 2015, at 19:53, Chris Knipe <[email protected]> wrote: > >> On Sat, Jan 17, 2015 at 10:21 AM, Michael Loftis <[email protected]> wrote: >> >> Basically, yes, you need DFC to get your target rates. And it's more about >> pps than bps. CFC in non classic mode is 30Mpps for the whole chassis. If >> you have any classic cards you'll be stuck at half that (because the packet >> headers are larger in this mode), 15Mpps. ... I don't think you can get a >> SUP720 entirely without the PFC...as that's basically the bit that's doing >> all the CFC decision making. The system will be limited in scale and >> features to the lowest common denominator between your DFC(s) and PFC. This >> is all in the FAQ below > > I'm still confused :-( Sorry. The only other line card in the chassis > would be one WS-X6748-GE-TX which is a 48 Port 10/100/1000 card. > > Yes, the SUP720 comes with MSFC3/PFC3 standard (we will be upgrading > memory on the SUP as well as the MFC to 1G, the max supported), and it > states it can deliver up to 40Gbps per slot. But from what you've > mentioned, we will thus now be limited to 15Mpps which is clearly not > going to be enough. > > The SUP720-3B is perhaps also an option, but if I have to start > looking at the 720-3BXL then it's becoming very expensive, yet again. > Do I then also understand correctly that in the case of a SUP720-3B I > need to purchase a WS-X6708-10G-3C and in the case of a SUP720-3BXL we > are talking about a WS-X6708-10G-3CXL (there are no 4-port line card > available with a DFC daughter card), or are these special versions > with the daughter cards only required to lower the impact of the > contention on the 8-port cards? > > Would the same also hold true then on a SUP720-3B or SUP720-3BXL in > the case of a WS-X6704-10GE, or would the bigger (better) SUP have no > problem with smashing the 15/30Mpps to pieces and deliver true 10Gbps > per port? I'm not after 100% guaranteed 10Gbps per port on the line > card, but I most certainly don't want to spend all this money and only > get like ~3Gbps per port either. > > What other options (except Nexus) would there be that can deliver ~8 x > 10GE (fiber) and 48 x 1GE at an affordable rate? Nexus is WAY over my > budget (and the reason why we're looking at the 6500 instead), and it > would seem (to me at least) I am stuck between a rock and a hard place > in terms of acquiring a low port density 10G switch at an affordable > price. > > Sorry for all the questions, in my 15 odd years of networking, this is > the first time that I will be entering the 10GE arena, so I really > want to just make sure that I get the correct kit from the start. > These toys aren't cheap :-( > > -- > Chris. > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
