August 2007 - NANOG - lists.nanog.org

more on Cleveland fiber cut
by David Lesher 23 Aug '07

23 Aug '07

http://www.cleveland.com/news/plaindealer/index.ssf?/base/business-3/118786… Vandals cut Internet line in Cleveland, causing online delays Thieves seeking copper suspected in online glitch Thursday, August 23, 2007 Shaheen Samavati Plain Dealer Reporter Notice your Internet connection acting up earlier this week? You weren't alone. Cleveland vandals - possibly copper thieves - probably caused delays for millions of Internet users around the world on Sunday night and much of Monday. Near Euclid Avenue and East 65th Street, someone apparently used a chain saw Sunday afternoon to cut through a high-capacity Internet trunk line, part of the backbone of the Internet. Although the thieves may have been seeking copper, there is no copper in fiber-optic cable. When workers went to fix the underground cables, they found that the coil of replacement cable they brought from a warehouse had been damaged by a gunshot, making it unusable. The setback meant things weren't brought back up to speed until Monday afternoon. The damaged trunk line is owned by Adesta LLC of Nebraska but is leased by several Internet wholesalers, including Cogent Communications, Level 3 and TeliaSonera. ..... [I've lost track; who is Adesta? Or rather... WHo did they buy out who'd installed the fiber?] -- A host is a host from coast to coast.................wb8foz(a)nrk.com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433

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Re: Cogent latency / congestion [NEW INFO]
by Michael Holstein 23 Aug '07

23 Aug '07

For those of you interested in a "from the ground" report, read here : http://blog.cleveland.com/business/2007/08/vandals_try_to_download_copper.h… Somebody used a chainsaw on a cable at Euclid & 65th (a mostly abandoned industrial area). http://maps.google.com/maps?f=q&hl=en&sll=37.0625,-95.677068&sspn=43.799322… The roll of replacement cable was subsequently found to be damaged by gunfire (it'd only take one shot to a spool to ruin the entire lot). No indication that this happened in conjunction with the first incident. The local cops are calling it a case of "dumb criminal", specifically that someone thought there was copper in the line (yes, they rip it right off poles here -- and sometimes, even try to climb the fence at a substation -- with interesting results) : http://www.newsnet5.com/news/13946673/detail.html Cheers, Michael Holstein CISSP GCIA Cleveland State University

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Re: For want of a single ethernet card, an airport was lost ...
by Paul Ferguson 22 Aug '07

22 Aug '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -- Steven Haigh <netwiz(a)crc.id.au> wrote: >On 18/08/2007, at 5:09 PM, Suresh Ramasubramanian wrote: > >> http://blog.wired.com/sterling/2007/08/lax-outage-is-b.html > >Wow, one little article, sooo much FUD. This quote really takes the cake: > >(((Nothing like that *so far,* that is. But why not dwell on the notion that terrorists can remotely transform the US Customs Service into a weapon against innocent travellers?))) > >Oh noes! The terrerists can kill all the airports by installing dodgy network cards in a machine! > They don't even have to touch the hardware. :-) http://www.wired.com/science/discoveries/news/2006/11/72051 - - ferg -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.6.2 (Build 2014) wj8DBQFGxyeyq1pz9mNUZTMRAhilAKCAVhfPC3924OkKxorku71NEKJyPwCfUHbj qHKWfdrcn/GBhD8eR3g90Z4= =qtg0 -----END PGP SIGNATURE----- -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg(at)netzero.net ferg's tech blog: http://fergdawg.blogspot.com/

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Re: Does anyone multihome anymore?
by Mike Tancsa 22 Aug '07

22 Aug '07

At 10:11 AM 8/22/2007, Paul Kelly :: Blacknight Solutions wrote: >Mike Tancsa wrote: > > > > At 03:49 AM 8/22/2007, Security Admin (NetSec) wrote: > > > >> Pardon my forwardness, but don't people just multi-home these days? > >> If your > > > > Multihoming is great for when there is a total outage. In the case of > > Cogent on Monday, it wasnt "down"... In this case, there is only so much > > you can do to influence how packets come back at you as BGP doesnt know > > anything about a "lossy" or slow connections. > > > > ---Mike > >Take the carrier that is causing you issues out of your eBGP setup and >all's well.... Hi, In my case, I have 6453 and 174 for transit. I want to get to 577 which is directly connected to 6453 and 174. 577 has a higher local pref on paths via 174. Short of shutting my 174 session (or some deaggregation), I dont have a way to influence how 577 gets back to me. I can easily exit out 6453, but it does nothing for the return packets. I have enough capacity on 6453 to handle all my traffic, but its a Draconian step to take and some traffic via 174 is fine and would be worse if I fully shut the session. (ie. peers of 174 in Toronto) ---Mike

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RE: Does anyone multihome anymore?
by Mike Tancsa 22 Aug '07

22 Aug '07

At 10:31 AM 8/22/2007, David Hubbard wrote: >That's because Cogent has chosen to not give us the BGP communities Actually, in my case I dont think it would help because 577 has some sort of paid agreement with teleglobe and probably a very cheap (or even zero $$$) agreement with Cogent. So I dont think they would let me influence their exit path to make them pay Teleglobe more money :) But yes, community tickery can be quite helpful, but it wont always do the trick. ---Mike

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CIsco Ons Questions
by Andrew Matthews 22 Aug '07

22 Aug '07

I have a few questions regarding a Cisco ONS. 1. Are there Channelized OC cards for the ONS? or are they just raw ports that can be done anyway needed? And if so are there OC3 and OC12 Channelized? 2. If 1 is true, can the ONS mux circuits? For example; Can i take 2 OC3s on one side, and mux them into one large OC12? 3. If all are true, what oc3 and what oc12 card is needed? and i think its the IR since i'm not going over 70km between the ons and the connecting device. Thanks Andrew

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Telefonica network contacts to resolve reachability issues.
by David Ulevitch 22 Aug '07

22 Aug '07

Is anyone from Telefonica around that can help debug some technical issues regarding reachability to a number of prefixes across a few ASs? The contact info on puck.nether.net bounces and info(a)us.telefonica.com is a bitbucket from all outward appearances. This has been going on for at least a month with no fix or reply to emails. Here are some example IPs that aren't reachable: (host, asn, ip) ns1.everydns.net | 15135 | 208.76.56.56 ns2.everydns.net | 3557 | 204.152.184.150 ns3.everydns.net | 26228 | 208.96.6.134 ns4.everydns.net | 3356 | 64.158.219.3 Thanks. David Ulevitch EveryDNS 415 287 7721

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Re: For want of a single ethernet card, an airport was lost ...
by leeyao＠trashymail.com 22 Aug '07

22 Aug '07

The government is completely incompetent. Public schools are in horrible condition, government networks constantly get failing or D grades, and on top of all this President Bush insists the Iraq war is necessary. What bull...I\'m surprised a member of the press hasn\'t killed Bush..

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RE: Does anyone multihome anymore?
by David Hubbard 22 Aug '07

22 Aug '07

From: Mike Tancsa > > Hi, > In my case, I have 6453 and 174 for transit. I want to get to 577 > which is directly connected to 6453 and 174. 577 has a higher local > pref on paths via 174. Short of shutting my 174 session (or some > deaggregation), I dont have a way to influence how 577 gets back to > me. I can easily exit out 6453, but it does nothing for the return > packets. I have enough capacity on 6453 to handle all my traffic, > but its a Draconian step to take and some traffic via 174 is fine and > would be worse if I fully shut the session. (ie. peers of 174 > in Toronto) That's because Cogent has chosen to not give us the BGP communities needed to influence traffic destined to you from their other peers. They're one of the providers I use and I just turn them off when they are having issues. With Level 3, for example, I can path prepend to just certain remote AS's, etc., it's nice to have that control. Dave

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Re: Does anyone multihome anymore? (was: Re: Cogent latency / congestion)
by Mike Tancsa 22 Aug '07

22 Aug '07

At 03:49 AM 8/22/2007, Security Admin (NetSec) wrote: >Pardon my forwardness, but don't people just multi-home these days? If your Multihoming is great for when there is a total outage. In the case of Cogent on Monday, it wasnt "down"... In this case, there is only so much you can do to influence how packets come back at you as BGP doesnt know anything about a "lossy" or slow connections. ---Mike

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