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control problems in communication networks
by RIPE NCC Staff 19 Aug '93

19 Aug '93

Can anyone assist Mario with his query below? ------- Forwarded Message Date: Thu, 19 Aug 93 16:29:40 +0200 From: bleich(a)epo.iitb.fhg.de To: ncc(a)ripe.net Subject: control problems in communication networks Dear Anne, let me explain what I want. In our lab we deal with machine learning algorithms , i.e. decision tree algorithms. The generic problem to machine learning is as follows. From samples of data (exapmles) described by a vector of attributes and a class, derive a function which predicts the class of the samples from the same population. The general scheme is to present the algorithm with "training data", from which it "learns" a classification function, then apply this function to some unseen "test data" to predict their class. One example for this is the recognition of handwritten digits. The handwritten digits were digitised onto images with 16*16 pixels and 256 grey levels. So each example consists of 16*16=256 attributes and 1 class (the digit). The resulting decision tree does not need all attributes to predict the class, only those which are relevant for the classification. Other application problems are in medicine, banking, etc. The question is now, is such an algorithm applicable on problems in communication engineering? One of the problems for example is the routing and flow control in networks. Perhaps it is possible to simulate such control algorithms. Mr. Kaehler told me, that you have made some experiments with the IBORN. It would be nice, to hear more about that. May be, you have data to another classification problem (like error recognition), too. Regards Mario Bleich ------- End of Forwarded Message

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Re: RARE Call for Tender for MS-Windows X.500 DUA using LDAP
by Mike Newell 12 Aug '93

12 Aug '93

> RARE solicits tenders for the provision of a Directory User Agent > employing the Lightweight Directory Access Protocol (LDAP/RFC1487) for > the MS-Windows operating system. Please direct all enquiries to the > RARE Secretariat (raresec(a)rare.nl, mail address below). > > Analysis of products available for personal/desktop computer systems has > indicated that no LDAP solution is available for the MS-Windows > platform. RARE has therefore decided to encourage the provision of such > a solution by offering to assist with the development costs. A full > specification of the requirements is attached to this solicitation. > This has really surprised me. I wrote one for NASA Headquarters this weekend; it was designed to be REALLY simple and return the basic information we need at Headquarters. All told it took me about 60 hours to learn Visual C++, LDAP, and WINSOCK enough to generate a simple interface. Surely there are others out there willing to share their projects???? Mike Newell NASA Advanced Network Applications

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RARE Call for Tender for MS-Windows X.500 DUA using LDAP
by dixon＠rare.nl 11 Aug '93

11 Aug '93

RARE solicits tenders for the provision of a Directory User Agent employing the Lightweight Directory Access Protocol (LDAP/RFC1487) for the MS-Windows operating system. Please direct all enquiries to the RARE Secretariat (raresec(a)rare.nl, mail address below). Analysis of products available for personal/desktop computer systems has indicated that no LDAP solution is available for the MS-Windows platform. RARE has therefore decided to encourage the provision of such a solution by offering to assist with the development costs. A full specification of the requirements is attached to this solicitation. Basic requirements, however, can be summarised as follows: o Support for MS-Windows 3.0 and higher and a commonly-available lower-layers protocol stack, preferably the WinSocket library. o A "user-friendly point-and-click" interface conformant to the "look and feel" of MS-windows, customisable for different language environments o The ability at least to search and browsethe directory and display entries. The ability to update and create new entries is to be preferred, but not essential. o Customisable schemas including basic provision of at least the "PilotPerson" Object Class defined in RFC1274. Within the schema, it should be possible to customise the default DUA display to show only a chosen subset of objects and/or attributes. o Available funding is limited, therefore a successful proposal is likely to be based on porting an existing DUA or on an offer for collaborative funding o The application should be freely distributable to the academic and research community represented by RARE for non-commercial use. Tenders should sent to the RARE Secretariat at the address below by 17th September 1993. Further information can be obtained from the same address. In addition to the information requested in the Requirements section of this call for tender, tenders should include: o The cost to RARE of the development work o The estimated start and end dates of the development phase of the project o The length of time for which support will be provided following the development phase, and the extent of that support o The name of an administrative contact for contract negotiation o The name of a technical contact o Telephone numbers, addresses and e-mail addresses of the named contacts Where the proposals are based on modifications to existing products, tenderers are encouraged to offer access to demonstration versions of the existing products so that there features may be compared. Specification ============= Hardware, Operating System and Communications Software ------------------------------------------------------ The DUA application should be supplied in binary form for execution under MS-Windows 3.0 + MS-DOS v5.0 or appropriate later releases of this software. The software should support a TCP/IP communication stack commonly available within the European academic community, preferably the WinSocket library. Tenders should indicate specific hardware and software requirements. Proposals should not rely on the availability of colour displays, but may require the provision of at least VGA-resolution monitors. Human Interface --------------- The application should provide an intuitive human interface which provides access to the major functions using the WIMP paradigm in a fashion compatible with the "look and feel" of other Windows applications. The application should be delivered with textual information provided in the English language, but should be developed in such a way that translation to other language environments is straightforward. Protocol Elements ----------------- The DUA should implement the protocol specified in RFC1487, although BIND requests may be restricted to "simple" authentication. Encoding rules for attribute values are as defined in RFC1488. Functionality ------------- The DUA is required to provide at least search, browse and display operations (i.e. it should be possible to look for an entry without knowing the exact RDN or position within the DIT and to display its contents in a meaningful way). It should be possible to navigate the directory structure without the need to enter either attribute names or values, although the entry of attribute values may be used to direct attention to a chosen part of the tree. The sorting scheme which determines the order in which entries are returned for selection should be customisable by the user (i.e. the attributes used to determine the order should be selectable). It should be possible by means of configuration (possibly by a system manager) to restrict the default DUA display to a subset of object classes, or attribute types meaningful in a particular application. The DUA may additionally provide for the updating of existing directory entries and for the creation of new entries. This provision will be balanced against the proposal cost: tenderers who wish to offer this functionality may benefit from quoting separate prices for the basic (search/display) and extended implementations. DSA Interworking ---------------- It should be possible to demonstrate interworking with at least two different DSA implementations. Dependency on a particular DSA will not be acceptable. Schema ------ The basic reference for the schema to be supported is RFC1274 (The COSINE and Internet X.500 Schema). The DUA must be pre-configured to be able to recognise the PilotPerson Object Class defined in this document. However, the DUA must also be configurable to support a variety of different classes of data object for all supported operations. Tenders should specify any restrictions on the data types or combinations of data types that may be used in configuring new classes of object. Intellectual Property, Support and Maintenance ============================================== Licensing --------- The application should be distributable freely or at nominal cost to the international academic and research community for non-commercial use. The supplier may make additional charges for the provision of support and/or documentation beyond that described below. It is not a requirement that the source code of the application be made freely available. Furthermore, the supplier shall not be inhibited from commercial exploitation of the product outside of this community. Installation, Support & Documentation ------------------------------------- Sufficient documentation should be provided (preferably in electronic form) to permit the installation of the application by an averagely-experienced network manager. The installation should contain a test procedure to enable its success to be determined. Following completion of the development phase of the project, the tenderer will be expected to fix significant defects in the application which are reported during the initial period of its use. Monitoring and Acceptance ========================= Intermim versions of the application should be made available for evaluation by a review group nominated by RARE. Payments will normally be staged, payment being dependent on the acceptance of each phase of the development by the nominated group. Addresses ========= Tenders to be sent to: RARE Secretariat Singel 466-468 NL - 1017 AW Amsterdam. Phone: +31 20 639 1131 E-mail: raresec(a)rare.nl

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REGISTRATION FORM - 16th RIPE meeting
by Anne Lord 10 Aug '93

10 Aug '93

********************************************************************** If you are interested in participating in the 16th RIPE Meeting in Amsterdam, would you kindly fill in the attached form and mail it to meeting(a)ripe.net as soon as possible. ---------------------------------------------------------------------- 16th RIPE meeting Registration reservation form Amsterdam, September 15th-17th 1993 a) Registration ( ) I would like take part in the RIPE meeting. ( ) I already have a RIPE badge from a previous meeting. ( ) I need a RIPE badge making up for me (please provide your details below). These will be printed on your badge. Name: Organisation/affiliation: Country: b) Personal details Please give your name and contact details below. If you have a person entry in the RIPE database, you do not need to fill this in. Name: Address: Address: Country: E-Mail Address: ------------------------------------------------------------------- Please send this form to: <meeting(a)ripe.net> or +31 20 592 5090 fax For further information please send mail to the above e-mail address. -------------------------end----------------------------------------

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ANNOUNCEMENT - 16th RIPE meeting
by Anne Lord 10 Aug '93

10 Aug '93

R I P E meeting announcement ============================ This is to announce that the 16th RIPE meeting will take place: Dates: 15 September 14:00h - 18:00h 16 September 09:00h - 18:00h 17 September 09:00h - 16:00h Venue: CWI Kruislaan 413 1098 SJ Amsterdam The Netherlands Host: NIKHEF Registration: Please use the registration form (which will follow in a separate mail) to give notice of your coming as soon as possible. General Information: -------------------- Currency: 1 UK pound = Hfl 3.- 1 ECU = Hfl 2.2 1 US$ = Hfl 1.90 Appended to this announcement: ------------------------------ - directions to the meeting place Documents to follow (separate mail messages): --------------------------------------------- <> details of hotels in Amsterdam close to meeting venue <> registration form for attendance at the meeting ================================================================== CWI - The RIPE meeting venue: How do I get there? ------------------------------------------------------------------ To ease any possible confusion, two postscript maps can be found in the RIPE document store. One shows the bus and tram stops around the meeting site and the other is a more general map of the area. Both maps are available by ftp: /ripe/docs/Next-Meeting/area-map.ps /ripe/docs/Next-Meeting/area-map.ps.Z /ripe/docs/Next-Meeting/local.transport-map.ps /ripe/docs/Next-Meeting/local.transport-map.ps.Z *PLEASE NOTE: The number 69 and 169 now end at Amstel station rather than Muiderpoort station. The number 15 now connects the Amstel station with Muiderpoort station. a) From Amsterdam Schipol airport: <> Take the train from the airport railway station to the Central Railway station (Amsterdam CS). Then from Amsterdam Central Station : <> Take tram number 9 till the stop at the intersection of Middenweg and Kruislaan (15 min ride). The stop is just before the intersection. <> Walk down the Kruislaan in the direction of the railway bridge. Cross under the bridge and continue. Take the 2nd entrance left and follow the signs to the meeting (15 min walk all together). Instead of walking down Kruislaan you can take the shuttlebus for 2 stops. Turn into Kruislaan and the bustop is a little way down on the right hand side of the road. or from Central Station you can: <> Take bus 22 in the direction 'Indische Buurt' to the stop at the 'Muiderpoort Station' and take shuttlebus 66 which stops outside CWI. b) Alternatively from Amsterdam Schipol <> Take the train from the airport railway station to the RAI station in Amsterdam, which is at the end of this line (10 min ride). NOTE: Amsterdam Central Station (CS) is on another line. Then from the RAI station: <> From the RAI station take the city bus number 69 or CN bus number 169 in the direction `Amstel Station'. From the Amstel Railway Station <> From the Amstel station take the city bus number 15 the direction `Muiderpoort Station' to the stop on the corner of Kruislaan and Linnaeusparkweg (15 min ride, ask the driver where to get off) or proceed to 'Muiderpoort Station' and take shuttlebus 66. You can also take the shuttlebus 66 from the Kruislaan and Linnaeusparkweg intersection as described above. d) Taxi from the airport <> Takes 15 mins and will cost approximately Hfl. 60.00 e) Connections away <> Tram 6 will take you to Leidseplein Tram 10 also Leidseplein Tram 14 To and from Dam Square Tram 9 Rembrandtplein f) Bus 66 Timetable <> From Muiderpoort Station (Monday - Friday) 7.20 7.40 8.00 8.20 8.40 9.00 9.20 9.40 10.10 10.40 11.10 11.40 12.21 12.51 13.21 13.51 14.21 14.51 15.21 15.51 16.11 16.31 16.51 17.11 17.31 17.51 18.11 <> From CWI to Muiderpoortsation (Monday - Friday) 7.28 7.48 8.08 8.28 8.48 9.08 9.28 9.48 10.18 10.48 11.18 11.48 12.28 12.58 13.28 13.58 14.28 14.58 15.28 15.58 16.18 16.38 16.58 17.18 17.38 17.58 18.18 <> This bus is a shuttle bus that operates from Muiderpoort station in a large circle around the CWI and NIKHEF campus. ==================================================================== Public Transport - how much does it cost and where can I get tickets? -------------------------------------------------------------------- Tickets of 15 strips (`Strippenkaart' costing Hfl. 10.75) can be bought in Post Offices, railway stations and cigarette shops. Tickets of 2 and 3 strips can be bought on the bus or the tram but they are much more expensive. You have to validate the ticket yourself in the metro stations and in the trams (except on lines 4 and 13). In the buses the driver will validate the ticket. Amsterdam is divided into zones: the old city is in zone `Centrum' whereas CWI is in zone `Oost'. You need to count how many zones you will be travelling through (from the centre - CWI is 2 zones) and count up that number of strips on your ticket + 1 extra. So in the above example you will need to stamp the 3rd strip. In case of overflow you stamp the last strip of the first ticket and start counting the remaining strips on the next ticket. Confused? Warning: BEWARE of pickpockets in crowded places.

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Re: RIPE DNS Hostcount July 1993
by Joseph Michl 05 Aug '93

05 Aug '93

Christian Huiteme is right. The x.25 is a well spreaded, well understood, well working and calculable network infrastructure in germany. It is right that for an IP dominated network you can think for an better infrastructure. But the point is not to have the best infrastructure, but to have at least one good. And with the x.25 network (WIN) we have one. So I think it is more right to say: because of this x.25 infrastructure there are so many IP Hosts connected in germany, and not in spite of. Concerning "trouble enhancement layer": There are problems with x.25, but they are resolvable. With every other protocol you have some problems. The way should therefore be to work at the problems and not to condemn a whole protocol. Regards, Joseph

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DELETE ME FROM THE RIPE-LIST, please.
by Otto Skultety 05 Aug '93

05 Aug '93

Please, delete me from the ripe-list. Otto Skultety skultety(a)mff.uniba.cs

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Re: RIPE DNS Hostcount July 1993
by pwj＠informatics.rutherford.ac.uk 04 Aug '93

04 Aug '93

Rob: I infer from the various messages that have followed the latest RIPE hostcount that there is some interest in the networking plans of the JANET community. The message below describes one of the things that has been done. There are others in hand and being considered. If you like, I'll be happy to give a short talk at the next RIPE meeting about our plans, and the challenges we are facing. Some of these challenges are unique to our community (or are you running 'yellow book' too? :-), but others are I think general. Anyway, I'd rather give a talk than enter into discussions on the mailing list. Comments welcome, Phil (p.jones(a)jnt.ac.uk) ----- Begin Included Message -----

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RIPE DNS Hostcount July 1993
by Marten Terpstra 04 Aug '93

04 Aug '93

People, below the RIPE DNS hostcount for July 1993. - all countries that have less hosts in this count have been counted once more, but none gave better results. - DE is getting very close to be the first European country to reach 100,000 machines. - in total an increase of almost 21,000 to almost 427,000 - History again appended - output again on ftp.ripe.net:ripe/hostcount, also available in the gopher server on gopher.ripe.net under "RIPE Archive"/"ripe"/"hostcount" Enjoy, -Marten RIPE DNS Hostcount Previous Count : Wed Jun 30 1993 This Count : Sun Jul 31 1993 CY SOA COUNTED DUPL REAL CHANGE ============================================================ al 1 0 0 0 0 at 280 12721 101 12620 + 1441 be 51 4323 87 4236 + 461 bg 1 0 0 0 - 1 by 0 0 0 0 0 ch 155 31195 714 30481 + 1653 cs 102 2804 54 2750 - 184 cy 5 30 0 30 0 cz 84 3260 76 3184 + 450 de 1372 92926 3412 89514 + 3951 dk 105 6601 93 6508 + 529 dz 0 0 0 0 0 ee 15 193 1 192 + 14 eg 1 0 0 0 0 es 246 10133 133 10000 + 976 fi 263 26736 761 25975 + 616 fo 1 0 0 0 0 fr 439 38833 482 38351 - 1516 gb 1 14 0 14 + 7 ge 1 0 0 0 0 gr 87 1316 216 1100 + 97 hr 17 327 0 327 - 96 hu 26 1414 7 1407 + 135 ie 41 1704 37 1667 + 60 is 33 1237 10 1227 + 21 it 349 14377 196 14181 + 1244 il 78 5510 55 5455 + 639 li 2 17 0 17 0 lt 1 0 0 0 0 lu 12 207 1 206 + 28 lv 2 16 2 14 + 6 mt 1 0 0 0 0 nl 376 35662 377 35285 + 2051 no 403 24922 235 24687 + 2466 pl 57 1123 7 1116 - 1965 pt 89 2786 64 2722 + 240 ro 2 14 0 14 0 se 445 32629 280 32349 + 1071 si 10 459 3 456 + 13 sk 21 306 7 299 + 105 su 132 523 29 494 + 192 tn 2 12 1 11 - 3 tr 9 189 1 188 + 12 ua 29 23 4 19 + 16 uk 633 90478 10749 79729 + 7168 va 0 0 0 0 0 yu 2 2 0 2 0 ============================================================ 5982 445022 18195 426827 +21897 History Oct 1990 31724 Nov 1990 33665 Dec 1990 29230 Jan 1991 43832 Feb 1991 - Mar 1991 44506 Apr 1991 46948 May 1991 - Jun 1991 63267 Jul 1991 - Aug 1991 73069 Sep 1991 92834 Oct 1991 104824 Nov 1991 129652 Dec 1991 - Jan 1992 141308 Feb 1992 161434 Mar 1992 167939 Apr 1992 170050 May 1992 182528 Jun 1992 196758 Jul 1992 213017 Aug 1992 221951 Sep 1992 232522 Oct 1992 254585 Nov 1992 271795 Dec 1992 284374 Jan 1993 303828 Feb 1993 322902 Mar 1993 355140 Apr 1993 366164 May 1993 385522 Jun 1993 404930 Jul 1993 426827

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Re: RIPE DNS Hostcount July 1993
by Arnold Nipper 04 Aug '93

04 Aug '93

>Sender: piet(a)mcsun.eu.net > > - DE is getting very close to be the first European country > to reach 100,000 machines. >With 90478 hosts the UK is also pretty close. >Interestingly, both countries once were X.25 >addicts where IP was a curse... :-) > That's not absolutely true! Long time ago there was *ONE* party which did not recommend IP as an open protocol. But as I said, that was before yesterday. > > Piet Arnold

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