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Specifying a layer 3 MLPA in the IRR
by Jake Khuon 05 Feb '98

05 Feb '98

Here are two pointers to two drafts for specifying and maintaining MLPAs in the IRR. I will be holding a presentation and discussion at the next Interprovider Ops BOF at NANOG 12. The first document is RIPE181 specific and the second is RPSL sepcific. http://espresso.merit.net/~khuon/khuon-003.txt http://espresso.merit.net/~khuon/khuon-004.txt -- /*====================[ Jake Khuon <khuon(a)Merit.Net> ]=====================+ | Systems Research Programmer, IE Group /| /|[~|)|~|~ N E T W O R K | | Vox: (734) 763-4907 Fax: (734) 747-3185 / |/ |[_|\| | Incorporated | +==[ Suite C2122, Bldg. 1 4251 Plymouth Rd. Ann Arbor, MI 48105-2785 ]==*/

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Re: MTU of the Internet?
by Dennis Simpson 05 Feb '98

05 Feb '98

> Date: Wed, 4 Feb 1998 10:51:44 -0700 (MST) > From: "Forrest W. Christian" <forrestc(a)iMach.com> > To: "Perry E. Metzger" <perry(a)piermont.com> > cc: Peter Ford <peterf(a)microsoft.com>, "'nanog(a)merit.edu'" <nanog(a)merit.edu> > Subject: Re: MTU of the Internet? > > Now it's been a while since I looked at latency vs transfer rates, so > maybe someone who works on this on an everyday basis would like to comment > on what ~200 more ms of latency on a 28.8 link would do to throughput > end-to-end across the net (totals of something like 350 and 512 ms > end-to-end). We recommend that clients who care about interactive response use small MTUs, and clients who care about download speed use higher MTUs. It seems most of them agree that smaller MTUs improve their interactive response for things like telnet, IRC, MUD, etc., particularly if they are downloading/surfing at the same time. Thx, dennis

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Agenda for the Interprovider Ops BOF at NANOG12
by Jake Khuon 05 Feb '98

05 Feb '98

Here's the final agenda for the Interprovider Operations BOF at NANOG 12. It will be held in the main room at 9PM on Monday night. Hope to see you all there. Interprovider Operations BOF - NANOG 12 AGENDA I. Introduction (Jake Khuon) A. Participant's List and Survey Form B. Notetaking Volunteer C. Agenda Bashing D. Unfinished Business NANOG OPS WG discussion (Jake Khuon) Do we need one? Publications series? Charter? II. Network-Based Denial Of Service Attacks Trends, Descriptions, and How to Protect Your Network (Craig Huegen) III. Specifying and Supporting a Layer-3 MLPA In the Internet Routing Registry (Jake Khuon) IV. PAIR Update and Other Fun Stuff (Abha Ahuja) V. Operational Issues for NAP Customers (Mark Cnota) VI. Other Discussions (open) -- /*====================[ Jake Khuon <khuon(a)Merit.Net> ]=====================+ | Systems Research Programmer, IE Group /| /|[~|)|~|~ N E T W O R K | | Vox: (734) 763-4907 Fax: (734) 747-3185 / |/ |[_|\| | Incorporated | +==[ Suite C2122, Bldg. 1 4251 Plymouth Rd. Ann Arbor, MI 48105-2785 ]==*/

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Troubleshooting Internet connections
by wthall＠vie.com 05 Feb '98

05 Feb '98

We have servers co-located at NAP sites across the country and have several thousand users connect to us daily. When the users have packetloss or latency problems I have been using traceroute and ping to troubleshoot their connections. From some recent threads here, I am concerned that these tools are giving me a false image of which routers are having problems because of the differences between the way some routers process the packets sent to them and packets sent through them (different priorities and input queues). Is there anyway other then traceroute and ping to pinpoint problems on an Internet connection? Thanks for any ideas you may have. Wayne Hall Network Manager VIE

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Re: Transparent Caching Solutions - Information Wanted
by Matt Ranney 05 Feb '98

05 Feb '98

Bill Unsworth <bill(a)u-net.net> writes: > Interesting discussion - no many comments from ISPs currently using caching > regarding the effectiveness - cache hit rates or bandwidth "saved". > > Any strategies for populating caches (in addition to user hits)? [...] I'm not sure sure that hit rate should be the primary means of measuring the effectiveness of an HTTP proxy/cache. As was discussed the SF NANOG, the penalty for packet loss on connections with higher RTTs is severe. So even if a proxy server is fetching a miss on a path with a lower RTT than the requesting client there's still a win. Of course, I know of no good way to measure this type of winnage. I guess I could claim squid's ICMP RTT measurement neighbor selection routing thing as another big win, but I'm sure it flies in the face of all that is Decent and True with the Purists out there. -- Matt Ranney - mjr(a)ranney.com Let's not let the students run the High School.

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Re: MTU of the Internet?
by Tony Li 05 Feb '98

05 Feb '98

jra(a)scfn.thpl.lib.fl.us (Jay R. Ashworth) writes: > > Unless your ISP uses BBN Butterflies and C30 IMPs in its backbone, I > > would discount the odds of running into a link with an MTU of 576. > > How do I program my router to emulate one of those? You don't need to. It's already there. You just need to configure it: conf term int serial 0 ip mtu 576 no ip route-cache <repeat for all interfaces> no router bgp 109 router egp 109 ... ^Z To simulate an IMP, you need to configure X.25 DCE interfaces. This is too gross to discuss on a family mailing list. ;-) Tony

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MTU size & IP packet size distributions
by rja＠corp.home.net 05 Feb '98

05 Feb '98

Not to interrupt a discussion by adding measured data, but there is some collected data on MTU sizes around the net. I believe kc has some packet statistics data online at NLANR. Alternately, there is some @Home packet size data (from Mike Schwartz) online in PDF format at: ftp://ftp.home.net/pub/rja/home-pkt-dist.pdf Folks perusing the @Home data should keep in mind that nearly all residential customers have 10baseT Ethernet access to the Internet. So we have near zero packets larger than Ethernet MTU. :-) Ran

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Re: BBn butterfly
by Jay R. Ashworth 05 Feb '98

05 Feb '98

On Thu, Feb 05, 1998 at 10:32:11AM -0500, Jon Zeeff wrote: > Any idea where we can buy a BBN butterfly? I think customers would > like to see it. This one should have been to the list, who're more likely to know; I've carboned it back; reply to JON, everyone. Or ask in alt.folklore.computers. Cheers, -- jra -- Jay R. Ashworth jra(a)baylink.com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "Two words: Darth Doogie." -- Jason Colby, Tampa Bay, Florida on alt.fan.heinlein +1 813 790 7592 Managing Editor, Top Of The Key sports e-zine ------------ http://www.totk.com

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RE: Transparent Caching Solutions - Information Wanted
by Barry Raveendran Greene 05 Feb '98

05 Feb '98

On Thursday, February 05, 1998 9:14 AM, Matt Ranney [SMTP:mjr@ranney.com] wrote: > > I'm not sure sure that hit rate should be the primary means of > measuring the effectiveness of an HTTP proxy/cache. Aggreed! When running the Cache Cluster at SingNet (Singapore Telecom) we were more interested in the bytes served vs bytes fetched. Barry

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Re: Quality of Service by Ferguson and Huston
by Hank Nussbacher 05 Feb '98

05 Feb '98

At 03:39 PM 2/4/98 -0500, Gordon Cook wrote: >For ordering data on the book see: >http://www.wiley.com/compbooks/catalog/24358-2.htm Or go to www.amazon.com and save 20% on Wiley's price (ISBN0471243582). -Hank

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