Re: NPE-G2 vs. Sup720-3BXL

[David Storandt <dstorandt () teljet com>]

I would love to use the RSP720-3CXL, but cost and the PA OC3 are the
difficulties.

If the RSP720s will run in a 6500 chassis, great! We wouldn't have to
purchase new chassis and the increased downtime for the swap-out.

RSP720 don't support the older bus-only FlexWAN either with the OC3 PA
we're using, so we'd have to figure out a solution for that - SIPs,
Enhanced FlexWAN, or external routers. Bah.

...the RSP720s + chassis + OC3 solution more than double our $20k/node
budget, so that's a much tougher sell internally.

-Dave


2009/5/15 Alex H. Ryu <r.hyunseog () ieee org>:
> Cisco 7304 may not adequate for service provider.
> It's CPU/IO-controller is tied together, and doesn't provide much of
> benefit.
>
> Cisco 7200/7300 is enterprise solution pretty much, and doesn't support
> distributed CEF.
>
> If you are considering SUP720-3BXL, why not considering RSP720-3CXL ?
>
> Alex
>
>
> Aaron Millisor wrote:
> > We ran into a similar quandary and have about the same amount of
> > traffic as your network. When purchasing gear a year ago we decided
> > against 7200's with an NPE-G2 as insufficient for the load. Have you
> > looked at the 7304?
> >
> > The Cisco 7304 with an NSE-150 processing engine on it offloads a lot
> > of the packet processing to dedicated hardware, and doesn't have TCAM
> > limitations for routes. You can hold several full feeds and do the
> > amount of traffic you're talking about without breaking a sweat.
> >
> > http://www.cisco.com/en/US/prod/collateral/routers/ps352/prod_bulletin0900aecd8060aac5.html
> >
> >
> > It is capable of supporting both legacy port adapters (from your
> > Flexwan or 7200 routers) and SPA cards with the right add-in modules,
> > which IIRC is only a few hundred dollars.
> >
> > I'd be glad to answer any questions you have about our implementation.
> >
> > --am
> >
> > David Storandt wrote:
> > > We're stuck in an engineering pickle, so some experience from this
> > > crew would be useful in tie-breaking...
> > >
> > > We operate a business-grade FTTx ISP with ~75 customers and 800Mbps of
> > > Internet traffic, currently using 6509/Sup2s for core routing and port
> > > aggregation. The MSFC2s are under stress from 3x full route feeds,
> > > pared down to 85% to fit the TCAM tables. One system has a FlexWAN
> > > with an OC3 card and it's crushing the CPU on the MSFC2. System tuning
> > > (stable IOS and esp. disabling SPD) helped a lot but still doesn't
> > > have the power to pull through. Hardware upgrades are needed...
> > >
> > > We need true full routes and more CPU horsepower for crunching BGP
> > > (+12 smaller peers + ISIS). OC3 interfaces are going to be mandatory,
> > > one each at two locations. Oh yeah, we're still a larger startup
> > > without endless pockets. Power, rack space, and SmartNet are not
> > > concerns at any location (on-site cold spares). We may need an
> > > upstream OC12 in the future but that's a ways out and not a concern
> > > here.
> > >
> > > Our engineering team has settled on three $20k/node options:
> > > - Sup720-3BXLs with PS and fan upgrades
> > > - Sup2s as switches + ISIS + statics and no BGP, push BGP edge routing
> > > off to NPE-G2s across a 2-3Gbps port-channel
> > > - Sup2s as switches + ISIS + statics and no BGP, push BGP edge routing
> > > off to a 12008 with E3 engines across a 2-3Gbps port-channel.
> > >
> > > Ideas and constructive opinions welcome, especially software and
> > > stability-related.
> > >
> > > Many thanks,
> > > -Dave