Additions to the NSFNET policy-based routing database

Thu Apr 9 07:22:15 UTC 1992

  >Jessica, 
  >	Confusion reigns again :-) This is exactly what had me puzzled.
  >Thanks for the info! On a different note, do you keep track of T1 only
  >sites? I.e. Sites that are only reachable via the T1 backbone?
  >
  >Erik

Folks (if I may butt in),

Greetings. Yes, in fact, if you subtract the number of T3 configured
networks from the number of T1 configured networks, you will have
the number of nets configured on the T1 only. Essentially, the list
of T3 networks is a subset of the T1 networks, since even the "T3
only" nets must have at least an interconnect configuration on the 
T1 side. 

-B. Sue Blair
 Merit Network Operations

-------------------------
  >To: Jessica Yu <jyy at merit.edu>
  >Cc: dennis at MrBill.CAnet.CA, sherk at sura.net, bsb at merit.edu, noc at sura.net,
  >        nwg at merit.edu, sherk at sura.net
  >Subject: Re: Additions to the NSFNET policy-based routing database 
  >In-Reply-To: Your message of "Tue, 07 Apr 92 17:50:26 EDT."
  >             <9204072150.AA17003 at kiddo.merit.edu> 
  >Date: Tue, 07 Apr 92 18:23:16 -0400
  >From: Erik Sherk <sherk at sura.net>
  >
  >
  >
  >> Erik,
  >> 
  >> My response is based on the mail you exchanged with Dennis which I thought 
  >> you had a question of why it is announced 5000 some nets on T1 but actually
  >> you do not get that much.  Apparently you were asking something else,
  >> looking at your original message.  Here is the answer of your original
  >> question:
  >> 
  >> >> T1 Network:
  >> >> ----------
  >> >>
  >> >> Total  T1 announced networks:  5012
  >> >>
  >> >>
  >> >> T3 Network:
  >> >> ----------
  >> >>
  >> >>       Total configured T3 networks:  5012
  >> 
  >> >Is this right? Are there really 5012 T3 routes?
  >> 
  >> I think it is a typo.  The number of nets CONFIGURED on T3 as of today is 2731.
  >> 
  >>                                                         --Jessica
  >
  >Jessica, 
  >	Confusion reigns again :-) This is exactly what had me puzzled.
  >Thanks for the info! On a different note, do you keep track of T1 only
  >sites? I.e. Sites that are only reachable via the T1 backbone?
  >
  >Erik