[103371] in North American Network Operators' Group
Re: 10GE router resource
daemon@ATHENA.MIT.EDU (William Herrin)
Wed Mar 26 19:12:18 2008
Date: Wed, 26 Mar 2008 19:00:10 -0400
From: "William Herrin" <herrin-nanog@dirtside.com>
To: "Sargun Dhillon" <sdhillon@decarta.com>
Cc: nanog@merit.edu
In-Reply-To: <47EAD42C.6060508@decarta.com>
Errors-To: owner-nanog@merit.edu
On Wed, Mar 26, 2008 at 6:54 PM, Sargun Dhillon <sdhillon@decarta.com> wrote:
> I wonder how difficult it would be to integrate such a device on to
> an x86 board cheaply. Something like NetFPGA (http://netfpga.org/) would
> be an interesting place to start. The board has on board SRAM, a bit of
> DRAM, an FPGA, and 2 GigE interfaces.
Hi Sargun,
SRAM != TCAM. With SRAM you can only access one word per cycle. The
coolness of the TCAM is that the entire memory is queried in one
cycle, spitting out the best match.
Nevertheless, there is some interesting hardware out there. The Endace
DAG card with the coprocessor has a TCAM on it, but it's not big
enough to handle a full BGP table.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
