May 2000 - Test - lists.nanog.org

test
by Dennis L. Shreve 23 May '00

23 May '00

testing

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Re: That pesky AS path corruption bug...
by Vadim Antonov 23 May '00

23 May '00

Peter T. Whiting <pwhiting(a)fury.ittc.ukans.edu> wrote: > As I understand the current spec, a router, upon receiving a malformed > as_path is supposed to respond with a notification message (3.11) and > drop the BGP connection. Your suggestion to maintain the connection > and drop the announcement is a practical one, but doesn't put as much > pressure on vendors to fix the bug. This is not only practical, but, in fact, the only sane way to do things. Dropping BGP session causes withdrawal of hundreds or thousands of acceptable routes. When the BGP session is reestablished, these routes will be acquired again, causing a wave of announcements. When the invalid route shows up, the cycle is repeated. What a perfect way to kill the Internet :) --vadim

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Re: That pesky AS path corruption bug...
by Vadim Antonov 23 May '00

23 May '00

Vijay Gill <wrath(a)cs.umbc.edu> wrote: > This is what BGP dampening is for. Dropping a few prefixes here and there > is a good way to make operational debugging of a network of any size, > hell. Dampening reduces negative effects, but there's still a potential for serious service disruption: processing a ton of new updates ties up CPU resources which in case of OFRV software can easily cause timer expiration on BGP sessions of peers border routers. > With a NOTIFY and a drop, there is a definite positive feedback that > something is majorly wrong and allows people to open top level cases with > vendors. I do not think that deliberately breaking things just to attract attention of the management is a good idea. If some vendor ignores bug reports, go to a different vendor :) --vadim

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Re: That pesky AS path corruption bug...
by Kai Schlichting 23 May '00

23 May '00

At Tuesday 01:26 PM 5/23/00 , Vijay Gill wrote: >This is a hack. We do not need more cruft added on, rather, what we need >is correct behavior. The correct behavior being - if you see a corrupt/ a >malformed update from a peer, send a notify and drop the session. Seems >fairly simple to me. > >The above suggestion of your fails in case of route servers. > >Insist on correct behavior, not on cruftery. ...reading the host requirements RFC and its definition of the robustness principle: Why was the behavior above chosen over the more conceivable and robust "ignore (log) corrupted message, continue with regular operation" ? Given route flap dampening, dropping the BGP session is hardly the desirable outcome here. On that note: under what circumstances should or shouldn't the BGP session come back up without mnual intervention? bye,Kai

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UUNET outage last night..
by Tatsuya Kawasaki 23 May '00

23 May '00

I understand there was major routing problem at UUNET last night. It started around 5:00 and ended 7:30pm EST. UUNET is not willing tell me what went wrong but could anyone tell me at this time. They were going to send me e-mail regarding this in a couple days... Tatsuya /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/ Tatsuya Kawasaki Allegiance Telecom Unlock the Power of the Internet http://www.kivex.com Phone 301.215.6777 Fax 301.215.5991 Affiliation given for identification not representation /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/

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NANOG 19 River Raft Trip - Final Announcement
by Daniel L. Golding 23 May '00

23 May '00

The Spring 2000 NANOG meeting will be held June 11-13 in Albuquerque, New Mexico. NetRail, Inc (www.netrail.net) and Riverstone Networks (www.riverstonenet.com) are hosting a special event: What: White Water Rafting Trip and Steak Dinner Cook-out URL: http://www.bigriverrafts.com/ How Much: FREE When: Saturday, June 10, 2000 - 10:00 AM (The day before NANOG begins) Where: We will pick you up at and return you to the Hyatt Regency in Albuquerque. http://www.hyatt.com/albuq/g-nano/index.html Who: The first 40 Nanogers to respond to: nanogerswww(a)netrail.net CUTOFF DATE: 5/24/00 at 1700EST. We will be closing registration at that time. So far, the following are signed up: W.D. McKinny Dave Diller Ed Kern Megan Hammar Franklyn Howell Mark Schlefer Joe Klein Josh Wepman Molly Balas Bang Tran Lauren Nowlin Miguel Dimayuga Maurice Dean Marc Mamane Kevin Epperson Steve Massey Donald Day Harold Williamson Phil Sykes Dan Golding Cheryl Granto Joe Granto Nathan Estes Scott Patterson David Reale Brian Fraine If you haven't signed up yet, please respond soon - spots are filling up. This should be a blast! - Dan Golding NetRail, Inc.

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NANOG Balloon Adventure Update and Information
by jmbrown＠abq-mail-01.ihighway.net 23 May '00

23 May '00

NANOG Ballooning Information: When: Sunday 11-Jun-00 Time: 0545 AM (yes its early, but well worth it!) Where: 19th Av, Launch area in Rio Rancho. Cost: $85 for about a 20 min flight Transportation is being arranged, but I need a head count. Figure that it will cost another $10 to $20 per seat for the bus ride to/from. Beer and Bubbly will be served **AFTER** the event, as is the tradition and custom. All NEW balloon'rs will be inducted via the various rights of passage! :) (bring cameras) Payment: Cash or Personal Check only, no credit cards Payment: to be made by Saturday evening at the hotel. See sign up area near NANOG registeration desk. You should wear, jeans, tennies / hiking boots, cutoffs and the like are not recommended less thee wish scratches from Cactus and Sage! :) Bring sun glasses if you have them. I need to have hard commit's from people by 2-Jun-00. Please email me directly with a subject that says: CONFIRM: Nanog Ballooning. Thanks Weather plays a part in this. If its to windy, we won't fly and your money will be refunded (minus bus trip if we go out to the field and then cancel).

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RE: UU-Net outage in Santa Clara
by Zaid Ali 23 May '00

23 May '00

Yes I have seen my lines go down a couple of times but not so bad since their loss in Santa Clara.. I heard that it was router hardware when I called in regards to my case in Santa Clara but I am worried if it is bad config applied across a couple of routers. Zaid ------------------------------------------ Zaid Ali Network Architect WebEx 110 Rose Orchard Way San Jose, CA 95134 Tel: 408-435-7251 fax: 408-435-7004 www.webex.com ---------------------------------------- -----Original Message----- From: Steve Cundall [mailto:SCundall@ariba.com] Sent: Sunday, May 21, 2000 9:28 PM To: Roy; Zaid Ali; nanog(a)merit.edu Subject: RE: UU-Net outage in Santa Clara Anybody know what's going on with UUNet in the SF bay area? Its been really bad the last week or so. They lost a frame switch in the Palo Alto office earlier last week and then late last week they were having more problems with our frame circuit that was causing the BGP peering to go down. We have run all weekend with no BGP routes from UUnet and will be bugging them on Monday to get that back up (I don't have the patience for them this weekend). Very odd, as they have been pretty stable over the last 6-9 months. I think its time to start complaining louder and escalating! Steve -----Original Message----- From: Roy [mailto:garlic@garlic.com] Sent: Friday, May 19, 2000 9:32 PM To: Zaid Ali; nanog(a)merit.edu Subject: Re: UU-Net outage in Santa Clara Santa Clara is back but now I have lost my connection to PaloAlto. Not a good week for UUNET in the SF BAY area Zaid Ali wrote: > I called the UU-Net NOC as one of my pipes is down.. there is no > reachability to 660.hssi2-0-0.gw2.scl1.alter.net . I detected the > downtime from 3:34pm. > > Zaid > ------------------------------------------ > Zaid Ali > Network Architect > WebEx > 110 Rose Orchard Way > San Jose, CA 95134 > Tel: 408-435-7251 > fax: 408-435-7004 > www.webex.com > ----------------------------------------

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NANOG 19 Registration Fee
by Carol Wadsworth 22 May '00

22 May '00

For those of you who have registered to attend NANOG 19 in Albuquerque, June 11-13, your registration fee must be received by June 2, otherwise the fee will increase $50. To check on the status of your payment, please see the meeting attendee list: http://www.nanog.org/mtg-0006/Registration.List.html If there are dashes by your name, payment is still due. ------------------------------ Payment Submission Information ------------------------------ Registration Fee: Before June 2 $300 After June 2 $350 Cancellation Fee (after 6/2) $35 Credit Card: When paying by credit card--MasterCard, Visa, or American Express--please include the following information: Card Type Number Expiration Cardholder's Name Checks: Please make payable to the University of Michigan Mail or fax payment information to: NANOG Registrar Merit Network, Inc. 4251 Plymouth Road, Suite 2000 Ann Arbor, MI 48105-2785 Fax Number: (734) 647-3185

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BGP filtering of supernets out of classful space
by Jeff Haas 22 May '00

22 May '00

In attempting to help someone with regards to BGP announcement filtering from the IRR we've found the following situation: A provider in China has been assigned addresses in the traditional class C space. APNIC's assignment is a /16 for this allocation. Said provider, trying to be good Internet citizens are announcing only aggregates of /16. However, they're running into several providers that are filtering the announcements because they aren't /24. Experimentation has proven that announcing /24's will solve this problem. This obviously clutters up the global routing tables. The primary justification I can see for such filtering is to prevent "sink routing" - or catching everything else where more specific routes don't exist. (This would probably be a Bad Thing for the provider foolishly making such announcements - a very effective self DoS attack.) What methodology are providers using for these types of route filtering issues now? (I'll save the IRR pulpit for later.) And yes, I have directed the provider having the routing issues to contact each ISP doing the filtering separately. -- Jeffrey Haas - Merit RSng project - jeffhaas(a)merit.edu

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