March 2009 - Test - lists.nanog.org

Network topology
by Colin Alston 15 Nov '13

15 Nov '13

Hi all I'm considering trying to come up with some means to automatically detect a networks topology and draw pretty pictures. This is somewhat boring though if a network isn't well arranged with VLANs and q-tag trunk routers and so on (It will just look like a big cloud of junk connected off an assumed switch). Is there any kind of cunning trick to detect standard layer2 switches along a path without stuff like STP?

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Inventory and workflow management systems
by vijay gill 26 May '13

26 May '13

What software solution do people use for inventory management for things like riser/conduit drawdown, fiber inventory, physical topology store, CLR/DLR, x-connect, contracts, port inventory, etc. Any experiences in integrating workflow into those packages for work orders, modeling, drawdown levels, etc. /vijay

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Re: Re: What is the most standard subnet length on internet
by 정치영 02 Aug '09

02 Aug '09

Suresh, Yes, I guess my concern is close to the second meaning. It seems so simple. Currently annoucement of /24 seems to be okey, most upstream providers accept this. However I wonder if there is any ground rule based on any standard or official recommandation. If there is some standardized rule about prefix length to be annouced, I will make my bgp & IP allocation policy of each data center of my company, and I will be able to more fairly and squarely speak to my customer like this "You have to change your server's IP address if you want move your server to other place" chiyoung ============================================= Chi-Young Joung SAMSUNG NETWORKS Inc. Email: lionair(a)samsung.com Tel +82 70 7015 0623, Mobile +82 17 520 9193 Fax +82 70 7016 0031 ============================================= ------- Original Message ------- Sender : Suresh Ramasubramanian<ops.lists(a)gmail.com> Date : 2008-12-19 12:37 (GMT+09:00) Title : Re: What is the most standard subnet length on internet Chi Young, let me clarify one thing here .. Do you mean IP allocation as in subnet allocation, swipping in apnic or through a rwhois server etc? Or do you mean "what is the minimum subnet size I can announce on the internet and have other providers not drop it on the floor"? srs On Fri, Dec 19, 2008 at 8:10 AM, 정치영 <lionair(a)samsung.com> wrote: > Hi everyone, > > I'm going to rebuild IP allocation policy of my company and I am looking for some standard reference for my policy. > I have already studied some standard like RFC1518, RIPE181, RFC2050 and I got it is very important to maintain hierachy structure. > However, what I am really wondering is what is the most standard subnet length that always can be guaranteed through Internet. less than /24 bit ? > I could not find any documents about that, which subnet length is most proper value and pursue internet standard policy ? >

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Re: Re: What is the most standard subnet length on internet
by 정치영 26 Jul '09

26 Jul '09

Hi all, I appreciate many people gave me advices, Some of persons asked me about my questions, I'm sorry for that I couldn't reply to everyone. Because of your help, I could get many opinions and standards regarding IP allocation policy. by the way, in APNIC's IP allocation sizes policy, there is a comments like below. "Below are the minimum sizes for allocations and assignments, This information is provided at the request of the ISP community to assist in filtering policy decisions " Currently, is there any provider filtering routes under LIR's minimum allocation size such as /22 ? Best regards, ============================================= Chi-Young Joung SAMSUNG NETWORKS Inc. Email: lionair(a)samsung.com Tel +82 70 7015 0623, Mobile +82 17 520 9193 Fax +82 70 7016 0031 ============================================= ------- Original Message ------- Sender : Danny McPherson<danny(a)tcb.net> Date : 2008-12-21 02:42 (GMT+09:00) Title : Re: What is the most standard subnet length on internet On Dec 18, 2008, at 9:43 PM, 정치영 wrote: > Suresh, > > Yes, I guess my concern is close to the second meaning. > > It seems so simple. Currently annoucement of /24 seems to be okey, > most upstream providers accept this. > However I wonder if there is any ground rule based on any standard > or official recommandation. > If there is some standardized rule about prefix length to be > annouced, I will make my bgp & IP allocation policy of > each data center of my company, and I will be able to more fairly > and squarely speak to my customer like this > "You have to change your server's IP address if you want move your > server to other place" Some useful guidance is provided here (and in subsequent references) as well: An Architecture for IP Address Allocation with CIDR <http://tools.ietf.org/html/rfc1518> Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy <http://tools.ietf.org/html/rfc1519> Network Renumbering Overview <http://tools.ietf.org/html/rfc2071> A Framework for Inter-Domain Route Aggregation <http://tools.ietf.org/html/rfc2519> HTH, -danny

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Network SLA
by Saqib Ilyas 15 Apr '09

15 Apr '09

Greetings I am curious to know about any tools/techniques that a service provider uses to assess an SLA before signing it. That is to say, how does an administrator know if he/she can meet what he is promising. Is it based on experience? Are there commonly used tools for this? Thanks and best regards -- Muhammad Saqib Ilyas PhD Student, Computer Science and Engineering Lahore University of Management Sciences

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Spoofer project update
by Robert Beverly 05 Apr '09

05 Apr '09

Hi, as many of you are acutely aware, IP source spoofing is still a common attack vector. The ANA spoofer project: http://spoofer.csail.mit.edu first began quantifying the extent of source verification in 2005. We've amassed several years worth of data -- data that has become particularly interesting in light of recent attacks. However, our data raised as many questions as it answered. Hence, we have developed a new version of the tester designed to answer these questions and improve our Internet-wide inferences. What's New: In addition to new tests, we've hooked into CAIDA's Ark infrastructure which allows us to perform multiple path-based measurements. This information is presented to the client now in visual form; see the screenshots for an example report: http://spoofer.csail.mit.edu/example/example.php How you can help: Simple -- take a few minutes to download and run the tester. The more points you can run the tester from, the better. Comments/Flames: Welcome, and we appreciate all feedback. Be sure to read the FAQ: http://spoofer.csail.mit.edu/faq.php Many thanks, rob

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Re: Fiber cut on Irish Sea
by isabel dias 01 Apr '09

01 Apr '09

ken, who's fiber on the ground was it after all? Roderick Beck wrote: > Probably Global Crossing. > > A very strong wager. > > -R. > ------Original Message------ > From: Ken Gilmour > To: isabeldias1(a)yahoo.com > Cc: nanog(a)nanog.org > Subject: Re: Fiber cut on Irish Sea > Sent: 29 Mar 2009 16:04 > > We received the report from Packet Exchange, however they are not the > owners of the cable. I assume they just rent spectrum. > > 2009/3/29 isabel dias <isabeldias1(a)yahoo.com>: >> >> affecting whom? and who's network? >> >> >> --- On Sun, 3/29/09, Ken Gilmour <ken.gilmour(a)gmail.com> wrote: >> >>> From: Ken Gilmour <ken.gilmour(a)gmail.com> >>> Subject: Fiber cut on Irish Sea >>> To: nanog(a)nanog.org >>> Date: Sunday, March 29, 2009, 4:55 PM >>> Hi There, >>> >>> Since we use a vendor of "the vendor" of two >>> Irish sea submarine >>> cables I am wondering if anyone has first hand information >>> on the >>> fiber cut this morning? Does anyone have a status update on >>> what is >>> happening? I am getting some Chinese whispers going on >>> here. >>> >>> Thanks! >>> >>> Ken >> >> >> >> > > > > Sent wirelessly via BlackBerry from T-Mobile.

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Google Over IPV6
by Robert D. Scott 01 Apr '09

01 Apr '09

http://www.google.com/intl/en/ipv6/ http://www.networkworld.com/news/2009/032509-google-ipv6-easy.html Any one making use of Google IPV6? Robert D. Scott Robert(a)ufl.edu Senior Network Engineer 352-273-0113 Phone CNS - Network Services 352-392-2061 CNS Phone Tree University of Florida 352-392-9440 FAX Florida Lambda Rail 352-294-3571 FLR NOC Gainesville, FL 32611 321-663-0421 Cell

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Hotmail/MSN/Live help?
by Weier, Paul 31 Mar '09

31 Mar '09

My mail server is currently being blocked by Windows/Live/Hotmail even though I am (and have been for years) a member of Microsoft's JMRP and SNDS services. Not sure what changed after years of peaceful co-existence. Could someone from Windows Live Hotmail please contact me off list? TIA -- Paul Senior System Administrator Internet Broadcasting paul(a)ibsys.com Visit us at: www.ibsys.com This message may contain information that is privileged or confidential. If you receive this transmission in error, please notify the sender by reply email and delete the message and any attachment; and be advised that disclosing, copying, distributing or taking any action in reliance upon the content is prohibited. --

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TWC outage
by Adam Greene 31 Mar '09

31 Mar '09

Seems to be an outage with Time Warner Cable in the upstate New York area ... As far as I can tell, it's on AS7843. I'm awaiting callback from an engineer for details .... Adam -- Webjogger (845) 757-4000 ASN 20208 ====== C:\>tracert www.authorize.net Tracing route to www.authorize.net [64.94.118.77] over a maximum of 30 hops: 1 38 ms 1 ms 2 ms 10049.webjogger.net [204.8.80.49] 2 6 ms 6 ms 7 ms cpe-24-29-112-25.nyc.res.rr.com [24.29.112.25] 3 8 ms 7 ms 6 ms gig-12-2-nycmnyrdc-rtr1.nyc.rr.com [24.29.104.97] 4 7 ms 7 ms 8 ms gig1-0-0-nwrknjmd-rtr1.nyc.rr.com [24.29.130.182] 5 7 ms 7 ms 6 ms ae-4-0.cr0.nyc30.tbone.rr.com [66.109.6.78] 6 9 ms 8 ms 8 ms ae-1-0.pr0.nyc20.tbone.rr.com [66.109.6.163] 7 8 ms 9 ms 8 ms 66.109.9.210 8 * * * Request timed out. 9 * * * Request timed out. 10 * * * Request timed out. 11 * * * Request timed out. 12 * * * Request timed out. 13 * * * Request timed out. 14 * * * Request timed out. 15 * * * Request timed out. 16 * * * Request timed out. 17 * * * Request timed out. 18 * * * Request timed out. 19 * * * Request timed out. 20 * * * Request timed out. 21 * * * Request timed out. 22 * * * Request timed out. 23 * * * Request timed out. 24 * * * Request timed out. 25 * * * Request timed out. 26 * * * Request timed out. 27 * * * Request timed out. 28 * * * Request timed out. 29 * * * Request timed out. 30 * * * Request timed out. Trace complete.

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