ARC ATM Testbed and GTE SCAN Project

ATOMIC-2 is implementing a production-quality IP LAN at 640 Mbps for the 65 workstations in the HPCC division at ISI. ATOMIC-2 is specifically researching the issues in augmenting this LAN to provide an integrated high-speed network, including ATM interconnectivity to the WAN, file services, etc.

We are members of an ATM Research Consortium (ARC) ATM testbed in the Los Angeles area, composed of two groups of participants:

ISI’s ATOMIC-2 project has the role of managing the network administration and configuration as follows:

Project status and milestones

Milestones

  • 4-6/95 – ISI ATM fiber installed
  • 10/95 – “scan.net” DNS installed
  • 12/95 – Web pages with IP, ATM link numbers and DNS forms released
  • 12/95 – single LIS chosen for IP configuration
  • 1/96 – Web pages with integrated DNS queries released
  • 2/96 – default IP router and ATM pvc configuration specified
  • 2/96 – ISI ATM line is up
  • 3/96 – ISI pings TAC, UCLA
  • 4/96 – TAC pings HMC
  • 4/96 – ISI installs default IP / ATM configuration
  • 4/96 – Web status pages installed
  • 5/96 – ISI pings HMC
  • 5/96 – DNS available over scan.net itself
  • 7/96 – PVC 3 used for ISI-UCLA link
  • 3/97 – Network redesigned to use a backbone PVC ring

Status – by site

  • ISI
    • ATM – done
      • 2/95 switch
      • 4-6/95 fiber
      • 12/95 single-mode line card
      • 2/96 line
      • 7/96 PVC 3 setup to UCLA for tests
      • 3/97 Redesign backbone PVC ring as full mesh
    • IP – full default IP table
      • 10/95 “scan.net” DNS installed
      • 3/96 pings TAC, UCLA, CIT
      • 4/96 full default IP router table configured
      • 5/96 pings HMC
      • 5/96 “scan.net” DNS moved onto scan.net
      • 5/96 added CSUN

Status – by topic

  • ATM
    • 12/95 TAC vcc table created
    • 7/96 PVC setup ISI-UCLA for tests
    • 2/97 TAC/UCLA Backbone redesigned based on PVC ring
    • 3/97 ISI full mesh based on PVC mask designed
  • IP
    • 10/95 ISI “scan.net” DNS installed
    • 12/95 ISI/TAC single LIS chosen, partitioned
    • 1/96 ISI Web pages with integrated DNS
    • 4/96 ISI default configuration specified
    • 5/96 ISI “scan.net” DNS moved onto scan.net
    • 5/96 ISI updated allocations to add CSUN
  • Web
    • ARC pages
    • SCAN pages
    • 12/95 ISI Network management
    • 1/96 ISI DNS query
    • 4/96 ISI project status

IP address tables

Abbrev.	Full name					Location
-----------------------------------------------------------------------
ISI	USC/Information Sciences Institute		Marina del Rey
UCI	Univ. Calif. at Irvine				Irvine
HMC	Harvey Mudd College				Claremont
UCLA	Univ. Calif. at Los Angeles			West LA
VAWLA	Veteran's Admin., West LA			West LA
TAC	The Aerospace Corp.				El Segundo
CIT	Calif. Institute of Tech.			Pasedena
SWRL	Calif. State Univ. / Soutwest Regional Lab	San Diego
USC	Univ. of Southern Calif. / ATRIUM		Los Angeles
JPL	Jet Propulsion Lab				Pasedena
CSUN	Calif. State Univ. / Northridge			Northridge
GTE	GTE / Marina del Rey lab			Marina del Rey

NB: Some sites have multiple internal connections.

IP Allocations

Loc.	IP Subnet/28	DNS Info
	
ISI	198.32.6.0	DNS Summary
UCI	198.32.6.16	DNS Summary
HMC	198.32.6.32	DNS Summary
UCLA	198.32.6.48	DNS Summary
VAWLA	198.32.6.64	DNS Summary
TAC	198.32.6.80	DNS Summary
CIT	198.32.6.96	DNS Summary
SWRL	198.32.6.112	DNS Summary
USC	198.32.6.128	DNS Summary
JPL	198.32.6.144	DNS Summary
CSUN	198.32.6.160	DNS Summary

(resv)	198.32.6.176	DNS Summary
(resv)	198.32.6.192	DNS Summary
(resv)	198.32.6.208	DNS Summary
(resv)	198.32.6.224	DNS Summary

GTE	198.32.6.240	DNS Summary

IP Address Conventions

For each subnet, the following addresses are predefined:

	198.32.6.subnet | 0.0.0.0	= network
				named
					(sitename)-net.scan.net
	198.32.6.subnet | 0.0.0.1	= primary router
				named
					(sitename).scan.net,
				i.e., for ISI:
					isi.scan.net
	198.32.6.subnet | 0.0.0.15 = subnet broadcast

IP address information and policy

ISI’s ATOMIC-2 project has the role of managing the network administrationand configuration.

To request an IP address within a preallocated set, use our handy form. (Exchange is SCAN)

To request an IP set to be allocated to your project, or for questions, send mail to Joe Touch at ISI.

The SCAN IP address is a Class C of 198.32.6.0 / 24, and is a single LIS (logical IP subnet). The mask is 198.32.6.255. The SCAN.NET IP network DNS is maintained at IDN.ISI.EDU (128.9.160.72), also available via SCAN.NET itself at ISI.SCAN.NET (198.32.6.1).

You can use dig at your site, or click on the handy web-accessible versions below:

	Get DNS Summary Info

	list of forward zone transfer:	dig @idn.isi.edu scan.net axfr

	list of nameservers (NS):	dig @idn.isi.edu scan.net ns

	list of reverse (PTR) resolutions:	dig @idn.isi.edu -x 198.32.6 axfr | grep " A "

To permit each site to allocate within this range autonomously, the IP address has been grouped into 16 “subnets”.

NOTE: subnetting is used for address assignment only, and does not imply that there are subnet routers or that subnet network addresses or broadcast addresses are valid.

A clickable table with current DNS information is available.

Note – you may allocate only 14 hosts in your virtual subnet (addresses whose last 4 bits represent 0 and 15 are reserved for possible future subnet and broadcast use, IF SUBNETTING via multiple LIS’s is supported).

A dummy host has been setup in the reserved
space to test DNS requests ONLY:
	foo.scan.net 198.32.6.1

ATM ring and VCI address tables

new table:

THIS ALLOCATION HAS BEEN CONFIRMED as of 5/97

The current table is as follows.

ATM PVP:PVC virtual routes

from:to Do not use locally
allocated
ISI HMC UCLA TAC
ISI  0-127 128-255 3:384-447 (UCLA)
6:384-447 (TAC)
3:256-381* 6:256-383
HMC  0-127 128-255 4:384-447 (UCLA)
5:384-447 (TAC)
4:256-383 5:256-383
UCLA  0-127 128-255 3:256-381* 4:256-383 3:448-511 (ISI)
4:448-511 (HMC)
TAC  0-127 128-255 6:256-383 5:256-383 6:448-511 (ISI)
5:448-511 (HMC)

(X) means the path is indirect, and X is the direct next-hop.

* indicates that some PVCs of this set are allocated to CAIRN, specifically the pair
ISI/3:382 <-> UCLA/3:382 and ISI/3:383 <-> UCLA/3:383

This table relies on the following allocations:


ATM PVP:PVC THRU maps

MUST BE IMPLEMENTED AT THE SITE LISTED BELOW

ISI-  3:448-511 <-> 6:448-511
HMC-  4:384-447 <-> 5:384-447
UCLA-  3:448-511 <-> 4:448-511
TAC-  5:384-447 <-> 6:384-447

NOTE: – = not implemented yet


ATM PVP Allocations

from:to ISI HMC UCLA TAC
ISI  * 3 6
HMC  * 4 5
UCLA  3 4 *
TAC  6 5 *

Notes: * = not connected

              3
         ISI-----UCLA
          |       |
        6 ++++    | 4
          |  +    |
         TAC-+---HMC
              5

(TAC is in Pacbell, others are in GTE)

ATM PVC Allocations

Although PVCs are intended to be link-based, not path-based, we use them for paths from source to destination. The reason is to reduce the number of PVCs allocated at the telco interfaces. It results in extending the ‘SCAN PVPs’ in the top part of the PVC space, and masking out the telco PVPs.

The space is allocated out of PVCs 128-511. 0-127 is avoided due to partial use as reserved space. Above 512 is avoided due to host interface limitations, and the desire to use end-to-end PVCs. There are 6 blocks of 64 PVCs remaining, which are used to create the full backbone interconnect:

PVCs:
        0-127   reserved (in-use)

        128-255 reserved for site-specific use

        256-383 use for direct-connected PVPs
                ISI-UCLA
                ISI-TAC
                UCLA-HMC
                TAC-HMC

                             3:256-381
                        (382,383 for CAIRN)
                         ISI<---------->UCLA
                          ^               ^
                          |               |
                6:256-383 +++++           | 4:256-383
                          |   +           |
                          v   +           v
                         TAC<-+---------->HMC
                              5:256-383

        384-511 used for 2-hop PVPs

        THRU SITE CONFIGURATION:

                ISI     3:448-511 <-> 6:448-511 THRU
                UCLA    3:384-447 <-> 4:384-447 THRU
                HMC     4:448-511 <-> 5:448-511 THRU
                TAC     5:384-447 <-> 6:384-447 THRU

        2-hop TO-SITE addresses:

                ISI-HMC         3:384-447 <-> 4:384-447 via UCLA
                ISI-HMC         6:384-447 <-> 5:384-447 via TAC
                
                UCLA-TAC        3:448-511 <-> 6:448-511 via ISI
                UCLA-TAC        4:448-511 <-> 5:448-511 via HMC


        384-447 use for 2-hop PVPs 
                ISI-(UCLA)-HMC
                ISI-(TAC)-HMC


                             3:384-447
                         ISI<----------(UCLA)
                          ^               |
                          |               |
                6:384-447 +++++           | 4:384-447
                          |   +           |
                          |   +           v
                        (TAC)-+---------->HMC
                              5:384-447

        448-511 use for 2-hop PVPs
                UCLA-(HMC)-TAC
                UCLA-(ISI)-TAC

                             3:448-511
                        (ISI)---------->UCLA
                          |               ^
                          |               |
                6:448-511 +++++           | 4:448-511
                          |   +           |
                          v   +           |
                         TAC<-+----------(HMC)
                              5:448-511

NOTE: PVC “0” (the lowest number in each group above) is pre-allocated for IP pings. Sites are expected to support 3 IP ping addresses, one for each remote site. The final ping address (for alternate path for the indirect site) is not strictly required.

archived old table:

This table invalid as of 3/97

		  	                 PVC TABLE
=============================================================================================
	ISI   	UCI   	HMC   	UCLA  	VAWLA 	TAC   	CIT   	SWRL  	USC   	JPL   	CSUN

ISI   	---	1112	1007++	1022*	497	1067++	92++	1037	1142	1097	?
UCI   	1112	---	1247	1367	617	1637	212	1472	1802	1742	?
HMC   	1007++	1247	---	1157++	512	1202++	107+*	1172	1277	1232	?
UCLA  	1022*	1367	1157++	---	527	1337*	122*	1292	1397	1352	?
VAWLA 	497	617	512	527	---	572	47	542	647	602	?
TAC   	1067++	1637	1202++	1337*	572	---	167*	1427	1667	1622	?
CIT   	92++	212	107+*	122*	47	167*	---	137	242	197	?
SWRL  	1037	1472	1172	1292	542	1427	137	---	1502	1457	?
USC   	1142	1802	1277	1397	647	1667	242	1502	---	1772	?
JPL   	1097	1742	1232	1352	602	1622	197	1457   	1772	---	?
CSUN	?	?	?	?	?	?	?	?	?	?	---
=============================================================================================
Notes:

All VCIs are in VPI 0.
Each pair of sites is allocated 15 VCIs.  

+  - 1 PVC established
++ - 8 PVCs established
+* - 12 PVCs established
*  - 15 PVCs established

ATM PVC Conventions


For each PVC pair, there is a block of 15 PVCs allocated. The
lowest-numbered PVC will be maintained by the backbone (Steve Schwab
at Aero), and is presumed to connect the primary IP router.