nanog mailing list archives

Re: too many routes


From: jvanick () megsinet net (Jason Vanick)
Date: Wed, 10 Sep 1997 10:03:07 -0500 (CDT)

On Wed, 10 Sep 1997, Joseph T. Klein wrote:

The routes issue historically comes down to the fact that Sprint did not
want to convert from Cisco 4000 to Ciscos that had larger memory capacity.
Memory is cheap these days ... the big boys just don't wish to have a
free market.

I do not think sprint had 4000s in their backbone, they had AGS+ routers.
The problem is not the lack of memory, but that the CPU can not process
all the date in the memory when it needs to. The cisco 7500 have that
same prob, sure you can put 256 megs of RAM in them, but can the CPU
recalculate the next hop if most of that date in that RAM changes?
The new RSP4 card may have solved that, we may be at a point now where the
router has enough processor to be able to process all the data it has
stored in memory and do it quickly. 

AGS+'s only could handle 16meg, the cpu in a AGS+ is the same as in a 7000
series, (motorola 68040)  As of a year ago, I believe I heard that sprint 
still had AGS+'s in their backbone and were upgrading them to 7000 series
equipment.

-- Jason
Jason Vanick ------------------------------------------ jvanick () megsinet net
Network Operations Manager                                   V: 312-245-9015
MegsInet, Inc.        225 West Ohio St. Suite #400         Chicago, Il 60610 


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