NPE-G2 vs. Sup720-3BXL

Steve Dalberg steve+nanog at
Mon May 18 09:45:33 CDT 2009

2009/5/18 Adam Armstrong <lists at>:
> 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.
> Have a look at the ASR1002 + ESP5/10G
> Stable for BGP+ISIS as far as our experience goes.
> adam.

ASR1002 + ESP5 was great for OSPF + BGP.  450M+ of traffic for me at
peek (proc at1-2%)


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