North American Network Operators Group|
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
- From: Bulent Yener
- Date: Thu Oct 14 11:44:23 1999
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.
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
Information Sciences Research Center
Bell Laboratories, Lucent Technologies
600 Mountain Avenue, Room 2T-314
Murray Hill, NJ 07974
phone: (908) 582 7087
fax: (908) 582 1239