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Re: Film at 11:00
From: alex () relcom EU net
Date: Wed, 1 Jan 97 18:42:01 +0300

First, Happy New Year.

2'th, sorry for my mistake - I just meant 45K as Cisco 4500... Through
it have not changed issue seriously -:)

3'nd.. Do you mean VIP2 idea is worst then SSE idea?


     Hmm, it's not news for us. 45K can hold core routing only as
     inter-back-bone router, not more.

     But why, why this crasy CISCO could not predict future when
     they designed 45K routers? It was not difficult  for them
     develop this box to cary 64 or 128MB RAM.

     >      Looks like the 45k mark was reached:
     >
     >   Folks with 7000's and SSE's should start monitoring their memory
     >   utilization via "show sse summary".

  There's a couple of comments here:

  First, 45k is not the limit.  More like 60k.  You'll pardon me for being
  cautious.

  The limitation is not DRAM.  It's the 64k words of SRAM that the SSE uses
  for its high speed forwarding table.  You don't want to pay for 64Mbytes of
  SRAM.  ;-)

  When cisco's engineers designed the SSE, we knew very well what was
  happening.  We expected to be given the opportunity to produce subsequent
  hardware which implemented the SSE in an ASIC.  If, by that time, CIDR
  hadn't killed off the exponential growth, we would have expanded the
  address space.  Unfortunately, cisco management decided that the SSE ASIC
  should not be implemented (a mistake which, to my knowledge, cisco has not
  corrected).  Thus, the 7500 exists without an SSE.

  Tony


--- 
Aleksei Roudnev, Network Operations Center, Relcom, Moscow
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