1. SCD Computer Room Networking Basil Irwin (et. al
SCD Computer Room Networking Basil Irwin (et. al.) Senior Network Engineer Network Engineering and Technology Section (NETS) April 6, 1999

2. Introduction

3. SCD Computer Room is Focus of Three Major Networking Functions
Focus of SCD Networking
Focus of UCAR Networking
Focus of Wide Area Networking

5. SCD Computer Room Contains Two Types of Networks
The NCAR MSS’s SAN HIPPI Network
So-called “backend” network
Not an IP-based network
Virtual-channel-switching
MSS Group maintains the MSS HIPPI network
Packet-based LANs/MANs/WANs
So-called “frontend” networks
Mostly IP
Plus a tad of AppleTalk, DECnet, NetBIOS, etc.
NETS maintains these networks

7. Conceptual User Access To SCD Resources

8. Conceptual User Access to SCD’s Supercomputers and the NCAR MSS
Local NCAR/UCAR user access
Dialup NCAR/UCAR user access
Remote university user access

10. Actual SCD Computer Room Networks

11. SCD Computer Room Networking
Supercomputer networks
Connects supercomputers to each other and to external services
Use to be exclusively FDDI
Now lots of Fast Ethernet (100-Mbps) too
Soon to include 1000-Mbps
Computer Room Host LANs
Connect to SCD/UCAR Servers: DNS, , NFS, SAMBA, login, authentication, web, etc.
Ethernet, Fast Ethernet, FDDI, and ATM
To include 1000-Mbps in the future

12. SCD Computer Room Networking (cont.)
Backbone LANs for UCAR networking
Mainly ATM
Some Fast Ethernet (100-Mbps)
Focal point for wide area networking
UCAR dialup access: the RAS
46 total dialups (soon to be 69)
Includes ports (soon to be 6)
Includes 1 test line

13. Types of Networking Equipment
Cisco 1010 ATM switches (5)
Cisco 5500 Ethernet Packet Switches (20)
Cisco 7507 Routers (5)
Cisco 4700 Router (1)

15. ML Cabling Hub

16. Hub For ML Site Cabling Cabling hub for the Mesa Lab site
Cabling hub for the computer room itself

18. SCD Computer Room Futures

19. Going to 1000-Mbps For hosts: For networks:
OC-12 ATM (622-Mbps)
Gigabit Ethernet (1000-Mbps)
For networks:
Host & network decisions can be different
Can have mixed environment if needed
Mixed 1000-Mbps networking types
Mixed 1000-Mbps host-connection types
Planning documents for 1000-Mbps upgrades

20. The End