nanog mailing list archives
Re: Vyatta as a BRAS
From: Valdis.Kletnieks () vt edu
Date: Wed, 14 Jul 2010 08:01:56 -0400
On Wed, 14 Jul 2010 02:18:18 -0000, "Dobbins, Roland" said:
Right. And to date, such routers make use of ASICs - i.e., 'hardware-based' routers, in the vernacular. Routers which use only centralized, general-purpose processors can't handle even a fraction of 'line-rate' without tanking
But as others have stated, the 7206 has at least some hardware acceleration, so it's *not* a router that uses *only* centralized general-purpose CPUs. So at least some hardware-assisted routers tank under loads too. And even the most heavily hardware-assisted systems have to do call outs from the FPGA's for *some* stuff, and can be tanked by suitably creative abuse of their weaknesses. Of course, in general the more hardware assist, the harder it is to tank (but it's never impossible). So basically, your definition of "hardware based" router is "one that has enough FPGAs to not tank under some arbitrary workload". Not very useful,that. Let's face it Roland - it's a continuum from hardware to software, and in many places it's downright murky which it is. Is the CRS-1 hardware or software? Lots of custom hardware in there - but lots of processing cores that look suspiciously like software engines too.
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Current thread:
- Re: Vyatta as a BRAS, (continued)
- Re: Vyatta as a BRAS Valdis . Kletnieks (Jul 13)
- Re: Vyatta as a BRAS Lamar Owen (Jul 13)
- Re: Vyatta as a BRAS Mikael Abrahamsson (Jul 13)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 14)
- Re: Vyatta as a BRAS Curtis Maurand (Jul 13)
- Re: Vyatta as a BRAS Nick Hilliard (Jul 13)
- Re: Vyatta as a BRAS Tony Li (Jul 13)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 13)
- Re: Vyatta as a BRAS Dan White (Jul 13)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 13)
- Re: Vyatta as a BRAS Valdis . Kletnieks (Jul 14)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 14)
- Re: Vyatta as a BRAS Lamar Owen (Jul 14)
- Re: Vyatta as a BRAS sthaug (Jul 14)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 14)
- Re: Vyatta as a BRAS Per Carlson (Jul 14)
- Re: Vyatta as a BRAS Lamar Owen (Jul 13)
- Re: Vyatta as a BRAS Curtis Maurand (Jul 13)
- Re: Vyatta as a BRAS Joe Greco (Jul 13)
- Re: Vyatta as a BRAS Dobbins, Roland (Jul 13)
- Re: Vyatta as a BRAS khatfield (Jul 13)