August 1996 - Test - lists.nanog.org

Re: Comparing an old flow snapshot with some packet size data
by Daniel W. McRobb 08 Aug '96

08 Aug '96

> > In message <2.2.32.19960806173812.00711b8c(a)mail.cts.com>, "Kent W. England" wri > tes: > > NANOG Folks; > > > [ ... > > > > Now, is there more data to bolster or refute these conclusions? I've done > > what I can with what I've found, but there just isn't much data to go on > > anymore. But I think it is pretty consistent with the view that a lot of the > > traffic is WWW TCP sessions of a few kilobytes. Would you agree? … [View More]Would path > > MTU discovery help or could we all just informally set the Internet default > > MTU up to 1500 bytes [as John Hawkinson suggested on big-internet] and > > suffer a few fragmented slow speed links. Are most PPP MTUs set at the > > default 1500 or no? > > > > --Kent > > > Hi there Kent, > > Persistant connections is a prominant feature of HTTP 1.1, now in > draft. Maybe someone who follows that WG can comment on its progress. > If on average there are 2-3 inline images per page (reasonable > estimate IMO, though I have no data to back this up), then the average > transfer size will increase. I've heard (verbal at NANOG) that > Netscape has promised to support persistant connections, with the only > caveat that they will open one connection for the page itself and > another for all the inlines so they can start rendering the first > inline while a long page is being read. They can probably avoid this > for short pages. This could lead to a significant improvement in the > ability of the Internet traffic to respond to low levels of packet > drop and make good use of TCP congestion control, plus it will > significantly improve the speed of transfer on uncongested paths where > currently TCP never gets out of the initial slow start. > > Curtis I did some analysis of the FIX-West traces a while back and posted it to the nlanr mailing list. It's been so long that I don't remember what I posted, but I seem to recall trying to make a judgement as to how many packets we'd eliminate with a mass migration to HTTP 1.1 and/or HTTP with T/TCP. I recall a figure around 14%, but that's just from memory. I just looked at the ARTS data for July 1996 for traffic we're receiving at the Sprint NAP, and the average packet size for WWW traffic was 231 bytes. Also, HTTP accounts for about 73% of the traffic we receive from peers at the Sprint NAP. I generated an incomplete plot of HTTP traffic growth (as a percentage of total packet traffic) for the ISMA workshop, and it's on the nlanr WWW site at the bottom of: http://www.nlanr.net/NA/Learn/daily.html I've been meaning to give a more recent plot to kc to place there, but haven't gotten around to it yet. The zero values for 05/95 and 08/95 are just due to me not having time to pull those months from tape. At any rate, in our case, a significant reduction in HTTP traffic (by caches, HTTP 1.1, T/TCP, whatever) would be nice since HTTP represents a large chunk of our backbone traffic. Daniel ~~~~~~ [View Less]

1 0

Just how big a load are UDP broadcasts?
by Dick St.Peters 06 Aug '96

06 Aug '96

I run a small network of small sites, including a couple in the Adirondacks with 56k feeds. When a user of one of these sites uses one of the UDP audio or video services it drives the 56k to 100% saturation (load 255/255) and makes the site unusable for everyone else. Recently I "solved" this problem by blocking this traffic at the entry port for my T1 feed. To my surprise, both the average and peak traffic on the T1 dropped by a factor of 3, although less than 2% of my users complained. … [View More]

8 13

Re: audio/video again
by Paul Ferguson 06 Aug '96

06 Aug '96

At 05:53 PM 8/5/96 -0700, Michael Dillon wrote: > >Maybe we could get an RFC that requires screensaver type applications to >have a standalone mode that works with stored data and require user >overrides in order to initiate video or other data feeds. Maybe it could >also require that video and data feeds automatically shut down if there is >no user interaction within a specified time period. Kind of a higher level >view of the smae kind of timing specs that make TCP work. … [View More]

2 1

Survey on Continuing Education for Network Computing Professionals
by feedback＠decisive.com 06 Aug '96

06 Aug '96

This survey is on behalf of an education center dedicated to the needs of network computing professionals. We are asking your input to help us create better education/training programs for you and your company. Your responses will be completely confidential. If we receive your completed survey by Monday, August 12, 1996, we'll automatically enter you in a contest for a prize of $1,000; one winner will be chosen from among those who complete the survey. Thank you in advance for your help. (… [View More]Authentication marker -- ~3%e%INTCADX%8%1%1342%5CTJVlfE%25596& -- do not remove.) To respond, create a reply e-mail message that contains the survey. Some e-mail systems require you to manually copy and paste the survey into your reply. Make sure the reply contains the *entire* authentication marker, including what looks like garbage. To answer a question, type an x between the brackets, like this: [ x ]. For fill-in-the-blanks, type between the brackets like this: [ your response ]. Please make no other changes to this survey. 1. If for any reason you do NOT want to be contacted in the future via e-mail, please indicate after the first question by placing an "x" within the brackets. You will be omitted from future e-mail surveys. [ ] a) Please omit me from future e-mail surveys. 2. What is your company's PRIMARY industry or business? Choose one: [ ] a) Aerospace [ ] b) Communications carrier (telco, broadband, internet) [ ] c) Financial services [ ] d) Healthcare [ ] e) Manufacturing: computer/software [ ] f) Manufacturing: non-computer [ ] g) Government/military [ ] h) Publishing/media/advertising/public relations [ ] i) Transportation/utilities [ ] j) Wholesale/retail: non-computer [ ] k) Education [ ] l) Entertainment [ ] m) Computer reseller/retailer/VAR [ ] n) Systems integration/consulting [ ] o) Other, please specify... [ ] 3. What is your job function? Choose one: [ ] a) IS/MIS/Data processing [ ] b) LAN/network systems [ ] c) Internet/Web [ ] d) Intranet (in-TRA-net) [ ] e) Data communications/telecommunications [ ] f) PC/microcomputer/information center [ ] g) Systems analyst/applications development [ ] h) Systems engineer/integration [ ] i) Other computer-related, please specify... [ ] [ ] j) Executive/corporate office [ ] k) Financial/accounting [ ] l) Engineering/R&D [ ] m) Sales/marketing [ ] n) Other administrative, please specify... [ ] [ ] o) Consulting (computer related) [ ] p) Training/education [ ] q) Other professional, please specify... [ ] 4. Please check the statements below that describe your involvement with networks. Choose all that apply: [ ] a) I manage networks. [ ] b) I design networks. [ ] c) I install networks. [ ] d) I troubleshoot/fix networks. [ ] e) I train or support network users. [ ] f) I initiate the evaluation of new network technologies. [ ] g) I evaluate or specify brands of network products. [ ] h) I ensure that networks meet specific business or organizational objectives. 5. What is the scope of your involvement with networking in your organization? Choose one: [ ] a) Entire organization or enterprise [ ] b) Entire work location [ ] c) Multiple departments at more than one location [ ] d) For a single department only [ ] e) Other 6. How many servers do you have installed in your organization? Choose one: [ ] a) Over 50 [ ] b) 10 to 49 [ ] c) 1 to 9 [ ] d) None 7. How many LANS do you have installed in your organization? Choose one: [ ] a) Over 25 [ ] b) 5 to 24 [ ] c) 1 to 4 [ ] d) None 8. How many microcomputers/workstations are connected to LANS in your organization? Choose one: [ ] a) 500 or more [ ] b) 25 to 499 [ ] c) 1 to 24 [ ] d) None 9. How many employees do you supervise? Choose one: [ ] a) Up to 3 people [ ] b) 4 to 10 people [ ] c) More than 10 people [ ] d) None 10. Do you yourself have responsibility for networking education/training provided to employees in your company? Choose one: [ ] a) Yes [ ] b) No [ ] c) Don't know 11. What is the annual budget for education/training for yourself and those you supervise? Please enter the amount within the following brackets. [ ] 12. During the last 12 months, where did you or those you supervise receive education/training for networking? Choose all that apply: [ ] a) In-house [ ] b) University/college [ ] c) Seminars [ ] d) Internet [ ] e) Other [ ] f) No education/training on networking was received NOW WE WANT YOUR OPINIONS ABOUT A POSSIBLE EDUCATION CURRICULUM ON NETWORKING TECHNOLOGIES. For each of the following 10 course descriptions, please indicate your level of interest. 13. A Network Technologies course covering circuits and fibers; modulation and modems; LANs; WANs; frames; cell switching; wireless; satellites; connection-oriented and connectionless service; characteristics of each technology; addressing; media access; comparisons. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 14. A Network Interconnection and Internetworking course covering interconnection technologies; repeaters, bridges, and routers; internet addressing; address binding; datagram forwarding; techniques to accomodate heterogeneity (e.g. encapsulation and fragmentation). Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 15. A Network Protocols and Protocol Design course covering protocol layering; problems protocols solve; loss, reordering, corruption, congestion, duplication, and replay; techniques such as framing, checksumming, sliding window, and retransmission; focus on the transport layer, but cover other layers. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 16. A Routing and Routing Protocols course covering packet forwarding; route propagation; vector-distance and link-state algorithms; spanning tree. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 17. A Distributed Programming and Applications course covering client-server paradigm; socket API; middleware (e.g. RPC and CORBA); building a server; multithread server execution; protection and authorization; example applications. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 18. A Network and Protocol Performance Evaluation course covering throughput and delay; measuring and tuning protocols; instrumentation of protocol stacks; traffic analysis; self-similar behavior. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 19. A Networking and Protocol Support for Multimedia Applications course covering high-speed networks; resource allocation and performance guarantees; protocols for audio and video; techniques such as compression and delayed playback. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 20. An Advanced Server Design and Implementation course covering implementation of concurrent, parallel servers; large-scale designs; proxy servers (e.g., SLIRP); techniques such as buffering, replication, caching, and application gateways. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 21. An Advanced Routing course covering policy-based routing; multicast; mobility; inter- and intra-layer encapsulation; longest prefix forwarding table lookup algorithms; virtual LANS. Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 22. An Advanced Network Applications course covering EDI; electronic commerce; advanced Web techniques (e.g. Java). Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting 23. What would your level of interest be in taking a group of these courses as a coordinated curriculum? Choose one: [ ] a) Very interesting [ ] b) Moderately interesting [ ] c) Somewhat interesting [ ] d) Not at all interesting THINKING ABOUT THE CHARACTERISTICS AND BENEFITS OF DIFFERENT TYPES OF EDUCATION PROGRAMS that could be made available for networking technologies, please indicate which of the following would be important to you. 24. A course curriculum leads to an advanced college degree. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 25. Each course generates a document of professional certification. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 26. Course curriculum leads to an overall certification. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 27. Course is available at your place of work. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 28. Course is available at a local university or college campus. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 29. Courses available at an industry event you already attend. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 30. Courses conducted by an advanced educational institute staffed by networking experts. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 31. A core curriculum of a specified number of courses that would follow a building educational sequence. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 32. A concentrated face-to-face education program conducted over consecutive days. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 33. Ability to take class lessons, labs and tests over the Internet from your desktop. Choose one: [ ] a) Very important [ ] b) Somewhat important [ ] c) Not very important [ ] d) Not at all important [ ] e) No opinion 34. What other thoughts do you have concerning what could be done to improve educational or training programs on networking technologies? Please write within the brackets. [ ] 35. How many years have you been professionally involved in computing? Choose one: [ ] a) Less than 2 years [ ] b) 2 to 4 years [ ] c) 5 to 10 years [ ] d) More than 10 years 36. Which of the following ranges includes your age? Choose one: [ ] a) 18 to 34 [ ] b) 35 to 44 [ ] c) 45 to 54 [ ] d) 55 and older 37. Which of the following represents your highest level of education? Choose one: [ ] a) Attended high school [ ] b) Graduated high school [ ] c) Attended college [ ] d) Bachelor's degree [ ] e) Master's degree [ ] f) Doctorate degree 38. What do you estimate your total household income was last year? (Please estimate total income for everyone in your household, including salaries, wages, bonuses, interest, dividends, etc.) Choose one: [ ] a) Less than $15,000 [ ] b) $15,000 to $24,999 [ ] c) $25,000 to $34,999 [ ] d) $35,000 to $49,999 [ ] e) $50,000 to $74,999 [ ] f) $75,000 to $99,999 [ ] g) $100,000 to $149,999 [ ] h) $150,000 or more [ ] i) Don't know Thank you for participating in this survey. [View Less]

1 0

totd
by Kelly J. Cooper 04 Aug '96

04 Aug '96

Traceroute of the day: traceroute to styx.ios.com (198.4.75.44), 30 hops max, 40 byte packets 1 cambridge1-cr1.bbnplanet.net (192.52.71.11) 3 ms 7 ms 8 ms 2 cambridge2-cr2.bbnplanet.net (192.233.149.202) 3 ms 3 ms 2 ms 3 alternet.bbnplanet.net (192.233.33.8) 4 ms 3 ms 3 ms 4 Hssi4-0.Boston3.MA.Alter.Net (137.39.100.97) 4 ms 3 ms 3 ms 5 Fddi0-0.Boston6.MA.Alter.Net (137.39.99.10) 5 ms 4 ms 4 ms 6 Hssi2-0.CR1.BOS1.Alter.Net (137.39.101.166) 130 ms 196 ms 11 ms 7 … [View More]

8 8

What to do?
by jprovo 04 Aug '96

04 Aug '96

What would one do if they tripped across Net 10 [or other private nets] used & routed by an organization on the Greater Net? This isn't a case of waltzing through someone's firewall, either... Joe Provo Network Operations Center UltraNet Communications, Inc.

2 1

Re: totd
by Vincent J. Bono 04 Aug '96

04 Aug '96

> The biggest problem with using non-routable ip addresses on numbered interfaces > whether point to point or frame or atm or whatever, is that you lose outside > connectivity from those interfaces. We tried this, but the essential > traceroutes from our core routes are too important when debugging BGP > problems to the outside. > > Robert Bowman > Exodus Communications Inc. > I agree. I can't see how a lot of debugging functions would be possible from the … [View More]

3 2

Pricing of Internet Addresses and Routing Announcements
by David R. Conrad 02 Aug '96

02 Aug '96

[Sincere apologies for duplicates] Hi, Back at the Montreal IETF, there was a BOF with the above title that generated significant "discussion". At the time, there seemed to be interest in discussing an experiment to see what would happen if the current restriction imposed by the registries that attempts to prohibit transfer of addresses between organizations were to be removed. APNIC offered to host a mailing list/archive for discussions aimed at coming up with a proposal for such an … [View More]

1 0

False Advertising
by Ehud Gavron 02 Aug '96

02 Aug '96

A customer of mine owns a cidr block they haven't been using. They've asked me to advertise it. I note that this block is being advertised by an ALTERNET customer. The nic / radb agree with my customer: HEARTS:[GAVRON.INTERNET]_whois 204.193.128.0 B3 Corporation (NETBLK-B3NET-EC) 2521 W. Arnold St. Marshfield, WI 54449 Netname: B3NET-EC Netblock: 204.193.128.0 - 204.193.159.0 Note that the ``unscrupulous other isp'' has gotten inverse: Domain System inverse mapping provided … [View More]

4 3

Re: False Advertising
by Daniel Kalitsi 02 Aug '96

02 Aug '96

Ehud, We will discuss this offline. I don't think the nanog list is the appropriate place to ask such a question. Dan Cyber Connection NOC A customer of mine owns a cidr block they haven't been using. They've asked me to advertise it. I note that this block is being advertised by an ALTERNET customer. The nic / radb agree with my customer: HEARTS:[GAVRON.INTERNET]_whois 204.193.128.0 B3 Corporation (NETBLK-B3NET-EC) 2521 W. Arnold St. Marshfield, WI 54449 Netname: B3NET-EC … [View More]

1 0