[c-nsp] Cisco 10G gear

Andrew Miehs andrew at 2sheds.de
Sat Jan 17 04:18:39 EST 2015

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.


Sent from a mobile device

> On 17 Jan 2015, at 19:53, Chris Knipe <savage at savage.za.org> wrote:
>> On Sat, Jan 17, 2015 at 10:21 AM, Michael Loftis <mloftis at wgops.com> 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.
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