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Re: Selective DNS replies
by Avleen Vig 26 Apr '02

26 Apr '02

On Wed, 24 Apr 2002, Felicia Kaye wrote: > Bind9 does this wonderfully. =) Cool :) > Here's some extracts from my named.conf, as an example. Just remember, if > you have any zones in a view, then you must also add that zone to all the > other views, otherwise you'll end up not serving those zones at all to the > other views. =) [snip] Your conf file shows that it is set up as: Define a view Now allocate zonefiles to it What if you host multiple domains, and the view you want to give them overlap? Is it not possible to do: Make a zone file Put views in it just for that zone Make another zone file for a different domain Put view in it that overlap the first zoenfiles, but won't conflict because they are in a different zone. By overlap I mean something like this: Zone1: 'internal' = 10.0.1.0/24 + 'external' = 192.168.1.0/24 Zone2: 'internal' = 10.0.0.0/16 + 'external' = 192.168.0.0/16 Zone3: 'internal' = 127.0.0.0/8 + 'external' = 10.0.0.0/16 Make sense?

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RE: UUNET instability?
by Gironda, Andre 26 Apr '02

26 Apr '02

On Thu, 25 Apr 2002, Kelly J. Cooper wrote: > Or you can buy the books: > > http://www.plan9.org Yeah I have the first BOfH. That's my #1 choice for bathroom reading, I highly recommend it! I guess it might be cooler to have it on dotmatrix printer paper, but the book format is compact and nice. -dre

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Re: UUNET instability?
by Kelly J. Cooper 25 Apr '02

25 Apr '02

On Apr 25, 5:34pm, blitz wrote: > Subject: Re: UUNET instability? * *At 16:59 4/25/02 -0400, you wrote: * *>On Fri, 26 Apr 2002, Lionel wrote: *> *> > >> *> > >>"A butterfly in outter mongolia flapped its wings" will probably be cited *> > >>before long... *> > > *> > >telnet bofh.engr.wisc.edu 666 * *The Archive of BOFH is here: * *http://bofh.ntk.net/Bastard.html Or you can buy the books: http://www.plan9.org Kelly J. (not affiliated, just a fan) -- Kelly J. Cooper - Security Engineer, CISSP GENUITY - Main # - 800-632-7638 3 Van de Graaff Drive - Fax - 781-262-2744 Burlington, MA 01803 - http://www.genuity.net

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IS-IS information
by Greg Pendergrass 25 Apr '02

25 Apr '02

What is a good reference for IS-IS and Integrated IS-IS? I'm looking for an overview of how the protocol works as well as specific vendors' implementations. Any suggestions? Greg

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Re: UUNET instability?
by blitz 25 Apr '02

25 Apr '02

At 16:59 4/25/02 -0400, you wrote: >On Fri, 26 Apr 2002, Lionel wrote: > > > >> > > >>"A butterfly in outter mongolia flapped its wings" will probably be cited > > >>before long... > > > > > >telnet bofh.engr.wisc.edu 666 The Archive of BOFH is here: http://bofh.ntk.net/Bastard.html

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RE: IS-IS information
by Jason Young 25 Apr '02

25 Apr '02

Cisco very recently published "IS-IS Network Design Solutions", ISBN 1-57870-220-8. I don't know of any other good references. It's obviously Cisco-centric but does try to cover questions like "why do I want IS-IS instead of [mumble] as my IGP". > -----Original Message----- > From: Greg Pendergrass [mailto:greg@band-x.com] > Sent: Thursday, April 25, 2002 4:00 PM > To: 'Nanog@Merit. Edu' > Subject: IS-IS information > > > What is a good reference for IS-IS and Integrated IS-IS? I'm looking for > an > overview of how the protocol works as well as specific vendors' > implementations. Any suggestions? > > Greg

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UUNET instability?
by Streiner, Justin 25 Apr '02

25 Apr '02

Anyone else seeing routing instability through UUNET or have any more details? I saw a significant drop in my inbound and outbound traffic to them around 10:00AM EDT. UUNET has a prompt on their phone menus about network instability, but didn't elaborate. Their NOC doesn't have any more details as of yet that they're passing along. jms

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The Myth of Five 9's Reliability (fwd)
by Pete Kruckenberg 25 Apr '02

25 Apr '02

>From the Canarie news mailing list. I don't think I've ever experienced five 9's on any telco service, I have always assumed I must be the one customer experiencing down-time, and the aggregate was somehow five 9's. How is network reliability calculated to end up with five 9's? Pete. ---------- Forwarded message ---------- Date: Wed, 24 Apr 2002 10:08:18 -0400 (EDT) From: CAnet-3-NEWS(a)canarie.ca Subject: [news] The Myth of Five 9's Reliability For more information on this item please visit the CANARIE CA*net 3 Optical Internet program web site at http://www.canet3.net/news/news.html ------------------------------------------- [A good article on the truth about five 9's reliability. Some excerpts - BSA] http://www.bcr.com/forum Deep Six Five-Nines? For much of the 20th century, the U.S. enjoyed the best network money could buy; hands-down, it was the most modern, most ubiquitous and most reliable in the world. And one term--five-nines--came to symbolize the network's robustness, its high availability, its virtual indestructibility. When the goal of five-nines was set, the network was planned, designed and operated by a monopoly, which was guaranteed a return on whatever it invested. It was in the monopoly's interest to make the network as platinum-plated as possible. One of the key points is that "five-nines" has long been somewhat overrated. Five-nines is NOT an inherent capability of circuit-switched, TDM networks. It's a manmade concept, derived from a mathematical equation, which includes some things and leaves out others. It's critical to remember that when you run the performance numbers on ALL the items in a network--those that are included in the five-nines equation and those that aren't--you're probably going to wind up with a number less than 99.999 percent. A well-run network actually delivers something around 99.45 percent. The gap between the rhetoric of five-nines and actual network performance leads to the conclusion that five-nines may not be a realistic or even necessary goal.

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RE: UUNET instability?
by Pena, Antonio 25 Apr '02

25 Apr '02

Yes, we are peering with UUNet in too many cities a cross USA and all the Network is a messed up, also I found some BGP session cleared by UUNet peering routers. Antonio J. Pena -----Original Message----- From: Streiner, Justin [mailto:streiner@stargate.net] Sent: Thursday, April 25, 2002 8:01 AM To: nanog(a)merit.edu Subject: UUNET instability? Anyone else seeing routing instability through UUNET or have any more details? I saw a significant drop in my inbound and outbound traffic to them around 10:00AM EDT. UUNET has a prompt on their phone menus about network instability, but didn't elaborate. Their NOC doesn't have any more details as of yet that they're passing along. jms

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Re: UUNET instability?
by Gregory Hicks 25 Apr '02

25 Apr '02

> Date: Thu, 25 Apr 2002 14:00:44 -0500 > From: J Bacher <jb(a)jbacher.com> > > At 02:51 PM 4/25/2002 -0400, Sean Donelan wrote: > > >That's unusual. A train derailment usually effects more than one > >provider, and normally does not cause network-wide BGP resets. > > Some C&W transport was lost as well. They also have a master ticket open. > > >On Thu, 25 Apr 2002, Daniel Kelley wrote: > > > UUNET support says that the outage relates to a train derailment in the > > > northeast that occured this morning. master ticket no. 562655. Thought this happened YESTERDAY - 4/24 ... Another one? > > > > > > dan > > > > > > > Anyone else seeing routing instability through UUNET or have any more > > > > details? I saw a significant drop in my inbound and outbound traffic to > > > > them around 10:00AM EDT. UUNET has a prompt on their phone menus about > > > > network instability, but didn't elaborate. Their NOC doesn't have any > > > > more details as of yet that they're passing along. ------------------------------------------------------------------- Gregory Hicks | Principal Systems Engineer Cadence Design Systems | Direct: 408.576.3609 555 River Oaks Pkwy M/S 6B1 San Jose, CA 95134 "The trouble with doing anything right the first time is that nobody appreciates how difficult it was." When a team of dedicated individuals makes a commitment to act as one... the sky's the limit. "There is no limit to what a man can do or how far he can go if he doesn't mind who gets the credit." - Robert Woodruff

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