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Re: Multicast Traffic on Backbones
by rs＠seastrom.com 15 Jun '01

15 Jun '01

"Thomas R. Charron" <tomc(a)koreawisenut.com> writes: > A South Korean company has developed an app that sets up multicast on a > network automatically. No router config required. It does it with a small > active-x that installs on a user's machine and gives a server on the ntwk > all the info it needs to route the multicast stream. Pretty cool stuff. > I'd call it a killer-ap for multicasting. It sounds as if I'd probably call it "unicast". ---Rob

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a.root-servers.net power issue (why there are 13)
by Sean Donelan 15 Jun '01

15 Jun '01

The NSI data center housing one of the root servers, a.root-servers.net, lost utility power today. Reportedly an outside utility transformer was damaged. Generators come on-line, and the servers remained up. NSI didn't show any loss of traffic, however a couple of ISP MRTG graphs of ping status did indicate a brief 15 minute network interruption. This may indicate an external issue, i.e. outside of NSI, such as a network re-route or flap. On the followup investigation, folks may want to check if there was a piece of equipment which wasn't plugged into where they thought it was. NSI has several different provider's networks into their building, so a proble with one network wouldn't affect the others. Matrix (average.miq.net) shows overall the combination of the dns-root servers stable, and relatively unchanged. In general, the root-server design is robust; and even if one root-server completely failed, the affect would be minor for several days.

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Re: Exploding manhole covers in Washington DC
by Richard A. Steenbergen 14 Jun '01

14 Jun '01

On Thu, Jun 14, 2001 at 05:35:58PM -0400, Deepak Jain wrote: > > PEPCO doesn't know why these manholes are blowing up, but started > putting grated manhole covers on to prevent this. Don't know if this > one was grated or solid. http://www.nbc4.com/images/NBC2JRIEYNCP.jpg That one looks solid to me. But at long as it didn't cut any fiber, why do we care. :P If you are in DC and you hear a bang, you should probably duck. I'm certain most DC residents are familiar with this one already. -- Richard A Steenbergen <ras(a)e-gerbil.net> http://www.e-gerbil.net/ras PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3 D8 14 36 FE B6)

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RE: What is up with 170.36.0.0/16
by Hire, Ejay 14 Jun '01

14 Jun '01

A peek at Merit shows that they haven't been advertised since the 8th. http://www.merit.edu/ipma/routing_table/ has a daily snapshot of the routing tables since the 8th. >From looking at their DNS entries, I'd guess their Administrator needs to reverse the priority of the MX records. The second one isn't pingable, but is telnet port 25 -able. -EJ -----Original Message----- From: Erik Antelman [mailto:erik@nombas.com] Sent: Thursday, June 14, 2001 11:29 AM To: nanog(a)merit.edu Subject: What is up with 170.36.0.0/16 Is someone renumbering around this area? My motivation is to understand the mechanisms and techniques \ by which a non-privelaged user (ie someone without login access to a BGP fed router) would diagnose (characterize, locate, identify, etc..) failure to reach a large corporations mail servers (1/2 of the MX servers for fleet.com) RADB has nothing on this, a New York QWEST looking glass says: Query: bgp IP address: 170.36.73.11 Location: New York Timeout: 20 seconds % Network not in table What's up?

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New list Top 10 ISPs
by Sean Donelan 14 Jun '01

14 Jun '01

NetworkWorld published an article citing research from Probe Research ranking the top 10 ISPs and their marketshare based on Year-end (2000) revenue. 1. Worldcom (27.9%) 2. AT&T (10%) 3. Sprint (6.5%) 4. Genuity (6.3%) 5. PSINet (4.1%) 6. Cable & Wireless (3.5%) 7. XO Communications (2.8%) 8. Verio (2.6%) 9. Qwest (1.5%) 10. Global Crossing (1.3%) Since PSI is larger than C&W, that C&W should pay for transit :-) I don't know what happened to Level 3, ELI, @HOME, Broadwing, or all the non-US ISPs. http://www.nwfusion.com/newsletters/isp/2001/00846039.html

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ACL aggregation tool
by J.D. Falk 14 Jun '01

14 Jun '01

There's been talk here occasionally about a tool to help aggregate access lists...anyone got it handy? -- J.D. Falk SILENCE IS FOO! <jdfalk(a)cybernothing.org>

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1220 L collo space
by alex＠yuriev.com 14 Jun '01

14 Jun '01

Hello, If anyone has space at 1220 L St. in DC available to collo a router, please contact me off the list. Looking for 10 RUs to 1 full rack. Thanks, Alex

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RE: Prefix-length FUD (was: Re: Opinions about InterNAP)
by Tony Tauber 13 Jun '01

13 Jun '01

On Wed, 13 Jun 2001, Michael Martin wrote: > The relevant portion of Tony's explanation (which is very concise) is the > following -- > > ++> but should see the route via P2 if P1 is accepting it. (Some > ++> may either block the announcement or have anti-spoofing packet filters > ++> at their borders that block the traffic itself). > > His explanation is very good but the statement that Seth made was that many > providers DO block the /24 announcements. Tony doesn't say anything > specifically about this. So the example is that you're numbered out of Provider1's CIDR block. You're fearing that Provider1 will block announcements of more-specifics from w/in their own blocks. My anecdotal understanding (which I agree has limited value) was that providers who filtered made *exceptions* in their filtering policies for their own CIDR blocks. *** What policies any other providers have is unimportant to my example and things will work just fine no matter the case with those people. *** At any rate, since you're a paying customer of P1, you at least have some influence to exert to get them to make exceptions. As for packet filters (vs. route filters), I doubt many ISPs would implement such a thing as that filtering is typically done at the customer edge. Tony > I remember plenty of threads on this topic but > very few non-anecdotal facts about ISP filter policies. Not being with an > ISP I'm very curious if there is a good answer. I'm not immediately > impacted since Nortel has a class A to work with but I've run into this > question from clients while doing consulting and just don't feel qualified > to really answer it authoritatively. Anyone? > > --- > Michael Martin > Internet Design Engineer > Internet Engineering > Nortel Networks

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Opinions about InterNAP
by Seth M. Kusiak 13 Jun '01

13 Jun '01

I've been told by many that most national providers filter any prefix greater then a /20 such as sprint and verio. -Seth David McGaugh writes: > /24's are sufficient to multihome with most if not all providers out > there. Why not conventionally multi-home to 2 large well established > providers? > > -Dave > > "Seth M. Kusiak" wrote: >> >> Hi >> >> We have a small network (5 /24s) and we need to host our web applications >> internally because they access backend servers that absolutely cannot be >> collocated. I am thinking about getting 2 T1s or fractional DS3s from >> InterNAP from different P-NAPS (1 from Philly and 1 from NY) each circuit >> from a different CO >> >> The reason that Im thinking InterNAP is because we dont qualify for a /20 >> and we would not be able to efficiently multi-home. It seems that InterNAP >> is perfect in our situation because they buy transit from multiple providers >> and claim to not have any black holes in their network. >> >> I hear many great things about InterNAP and I hear the opposite as well. >> >> Any thoughts would GREATLY be appreciated >> >> Thanks! >> >> -Seth

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sprint supervisors
by Dan Hollis 13 Jun '01

13 Jun '01

Does anyone know how to contact the supervisor(s) for the sprint Data Account Managers? Our account rep is giving us a line of bullshit and of course won't tell us who his supervisor is. -Dan

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