[25462] in North American Network Operators' Group
IP-Internets
daemon@ATHENA.MIT.EDU (Bulent Yener)
Thu Oct 14 11:43:39 1999
Date: Thu, 14 Oct 1999 11:02:04 -0400 (EDT)
From: Bulent Yener <yener@research.bell-labs.com>
To: nanog@merit.edu
Message-ID: <Pine.SOL.4.10.9910141036400.25287-100000@aura.research.bell-labs.com>
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Coming from an academic research background, I need a reality check.
I would appreciate your answers/thoughts etc. to the questions
I have below on WANs.
1- are there any all-IP backbones? what is the layer 2 in IP
backbones (PPP, ATM, Frame relay...)?
2- how commonly is IP over ATM used? Do network operators really care
about the cell-tax?
3- what is the approximate number of connections to a
router (i.e., fan-in, fan-out of a router (i) at the edge, (ii) at the
core, and (iii) at the backbone?
4- what is the maximum distance between any two points in a autonm.
system?
5- what is the approximate ratio of copper/fiber
at the edge, core, backbone links?
6- how tight is the physical space in the router rooms
(i.e., is it almost a must to take out an old box in order to add one)?
7- in case of a node/link failure what is the average/approx period of
time for (i) detection and (ii) recovery
I thank you in advance
Bulent
_____________________________________________________
Bulent Yener
Information Sciences Research Center
Bell Laboratories, Lucent Technologies
600 Mountain Avenue, Room 2T-314
Murray Hill, NJ 07974
email: yener@research.bell-labs.com
phone: (908) 582 7087
fax: (908) 582 1239
_____________________________________________________
