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Need to speak to a clueful Qwest BGP Engineer
by Hitesh Patel 17 Mar '00

17 Mar '00

I apologize for posting this message here, but it's my last hope. for upwards of a month now I have been trying to get a BGP Announcement problem fixed through the 'correct' channels at Qwest. So far there has not been any progress, and the people i'm talking to seem to not be clueful enough to help. If there is a knowledgeable Qwest routing engineer out there please contact me at any of the methods listed in my signature. Is anyone else having these problems with Qwest? So far there NOC response times have been nothing but crappy and it seems that there technical people know less then 3 monkeys trying to get 2 cisco's talking. If you are having the same problems please email me so I have some ammunition to go after Qwest with. -- |---------------------------------|----------------------------| | Hitesh Patel | Voice: (541) 759-3126 | | | Fax: (541) 759-3214 | | Preferred Communications Inc. | Email: hitesh(a)pciwest.net | |---------------------------------|----------------------------|

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Cisco's CNR vs ISC Bind/DHCP
by Fletcher E Kittredge 16 Mar '00

16 Mar '00

We are working here with the hypothesis that Cisco's CNR product is a lamer and inferior in quality to the Internet Software Consortium's open source DNS and DHCP software. Is this a generally accepted hypothesis, or are we off in the weeds (again) by ourselves on this one? thanks! fletcher

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Re: P[ath]char (Was Re: Alternative to BGP-4 for multihoming?)
by Mr. James W. Laferriere 16 Mar '00

16 Mar '00

Hello Tim . Sorry 'K' . But I couldn't tell. Too little information . JimL On Thu, 16 Mar 2000, Tim Salo wrote: > Hello Mr. Claffy & Mr. Chris Cappuccio , Thank you for > ^^ > Ms. > -tjs +----------------------------------------------------------------+ | James W. Laferriere | System Techniques | Give me VMS | | Network Engineer | 25416 22nd So | Give me Linux | | babydr(a)baby-dragons.com | DesMoines WA 98198 | only on AXP | +----------------------------------------------------------------+

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Re: Alternative to BGP-4 for multihoming?
by Andrew Bender 16 Mar '00

16 Mar '00

Gary E. Miller wrote: > And I sure hope that HOP count is not used, Singapore has a > mixture of very fast and very slow links to foreign countries > so hop count is a useless measure of "closeness". Quite possibly, if used by itself. Dr. Jacobsen's method (http://www.caida.org/Pathchar) is a proven strategy that could provide some relief here, but may be impractical interactively. Then again, isn't any interactive measurement going to be impractical? Andrew Bender tns-inc.com

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Re: Cisco Netflow Analysis Software
by Simon Leinen 16 Mar '00

16 Mar '00

>>>>> "dh" == David Hares <dhares(a)networktwo.net> writes: > Does anyone have or know of a cisco Netflow collector/reporter > available in the public domain? I maintain a couple WWW pages about NetFlow and similar systems. One of them has references to such software packages: http://www.switch.ch/tf-tant/floma/software.html Additions, corrections, praise or flames are all welcome. > Cisco used to have a basic one available on their website, but now > that that they have a commercial product using Netflow, the free > software is gone. Actually there is still some C code on ftpeng, which is also referenced from the abovementioned page. Hope this helps, -- Simon Leinen simon(a)babar.switch.ch SWITCH http://www.switch.ch/misc/leinen/ Who is General Failure & why's he reading my disk?

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Cisco Netflow Analysis Software
by David Hares 15 Mar '00

15 Mar '00

Does anyone have or know of a cisco Netflow collector/reporter available in the public domain? Cisco used to have a basic one available on their website, but now that that they have a commercial product using Netflow, the free software is gone. Dave ----------- David Hares NetworkTwo Communications Phone: 734.827.3620 650 KMS Place FAX: 734.827.3690 Ann Arbor, MI 48108 Email: dhares(a)networktwo.net

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RE: Cisco Netflow Analysis Software
by Hallgren, Michael 15 Mar '00

15 Mar '00

You might want to look at http://www.caida.org/Tools/Cflowd/ mh -----Message d'origine----- De: David Hares [mailto:dhares@networktwo.net] Date: mercredi 15 mars 2000 18:04 À: nanog(a)merit.edu Objet: Cisco Netflow Analysis Software Does anyone have or know of a cisco Netflow collector/reporter available in the public domain? Cisco used to have a basic one available on their website, but now that that they have a commercial product using Netflow, the free software is gone. Dave ----------- David Hares NetworkTwo Communications Phone: 734.827.3620 650 KMS Place FAX: 734.827.3690 Ann Arbor, MI 48108 Email: dhares(a)networktwo.net

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Re: Alternative to BGP-4 for multihoming?
by Andrew Bender 15 Mar '00

15 Mar '00

Marc Slemko wrote: > This will normally be a caching nameserver that may or may > not be the same as the nameservers for the domain. In theory, > it should be "close" to the client network wise for other > reasons. Is it always? No. But it is a more reasonable > metric. Have any substantive empirical studies been perfromed that validate this assumption? The degree to which it is true seems to be the gating factor for the effectiveness of this method... Andrew Bender tns-inc.com

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Remove
by Charles E. Yow 15 Mar '00

15 Mar '00

Remove

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Re: Alternative to BGP-4 for multihoming?
by Paul Vixie 15 Mar '00

15 Mar '00

> They sit on /28's and smaller in some cases. I'm certainly not going to > be successful in acquiring ASN's for these people to do proper load > balancing between multiple ISP's and most major ISP's see little benefit > in modifying route tables to include our small netblock. Right on man! > Its these cases I'm concerned with. In my mind, irrespective of the > comments on the functionality of DNS for this purpose, I see little other > choice. DNS is not the droid you're looking for. Using DNS response times to predict likely TCP performance is silly for at least as many reasons as using BGP aspath lengths to predict likely TCP performance is silly. > That being said, if anyone has better ideas on how to provide for high > availability to millions of web sites worldwide, please let me know. TCP performance is affected by congestion symmetry, since TCP uses the spacing of ACK packets to control the spacing of data packets. While there's no way to guarantee congestion symmetry, one of the leading indicators of whether you will have congestion symmetry is "whether you have path symmetry." Furthermore, the leading indicator of whether you have path symmetry is "whether the outbound flow's first hop is the same as the incoming flow's last hop." Thus http://www.vix.com/pub/vixie/ifdefault/. Try it. If you don't know how to apply patches to your kernel, then have a consultant do it. I wrote this for a pornography distributor whose pageviews-per-second went up by a factor of 1.7 peak and 1.25 average just as a result of using "interface defaults" rather than speaking BGP and trying to run defaultless.

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