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 > > >
