February 2012 - Test - lists.nanog.org

Common operational misconceptions
by John Kristoff 03 Mar '12

03 Mar '12

Hi friends, As some of you may know, I occasionally teach networking to college students and I frequently encounter misconceptions about some aspect of networking that can take a fair amount of effort to correct. For instance, a topic that has come up on this list before is how the inappropriate use of classful terminology is rampant among students, books and often other teachers. Furthermore, the terminology isn't even always used correctly in the original context of classful addressing. I have a handful of common misconceptions that I'd put on a top 10 list, but I'd like to solicit from this community what it considers to be the most annoying and common operational misconceptions future operators often come at you with. I'd prefer replies off-list and can summarize back to the list if there is interest. John

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Small ISP Need to Know
by not common 03 Mar '12

03 Mar '12

Hello, I work for an ISP (35K customers) and do System Admin work for operations and development (DNS, Radius and such). I want learn more on our IP side (Routing, BGP, MPLS, Core Network). I am trying to learn the Net Ops world piece by piece, and this is where I ask: Where is a good place (or places) to start learning ISP operations "Need To Know"? Thanks for your time

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IPv6 net tools
by Grupo IPv6 03 Mar '12

03 Mar '12

We are a group of students in telecommunications engineering from Uruguay. We are studying some network tools for our final project and we would like to know if someone could tell us which of this tools have IPv6 support: · Bprobe · Cprobe · Pathload · Pathrate · Pathchar · Clink · Nettimer · Spruce Thanks for your help!! Gianina

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Network Traffic Collection
by Maverick 03 Mar '12

03 Mar '12

Hello, I am trying to collect traffic traffic from pcap file and store it in a database but really confused how to organize it. Should I organize it on connection basis/ flow basis or IP basis. It might be an effort to write a customized traffic analysis tool like wireshark with only required functionality. I would really appreciate if someone can give me direction on write way of organizing the data because right now I only see individual packets and no way of putting them in some order. Best, Ali

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Reliable Cloud host ?
by Randy Carpenter 02 Mar '12

02 Mar '12

Does anyone have any recommendation for a reliable cloud host? We require 1 or 2 very small virtual hosts to host some remote services to serve as backup to our main datacenter. One of these services is a DNS server, so it is important that it is up all the time. We have been using Rackspace Cloud Servers. We just realized that they have absolutely no redundancy or failover after experiencing a outage that lasted more than 6 hours yesterday. I am appalled that they would offer something called "cloud" without having any failover at all. Basic requirements: 1. Full redundancy with instant failover to other hypervisor hosts upon hardware failure (I thought this was a given!) 2. Actual support (with a phone number I can call) 3. reasonable pricing (No, $800/month is not reasonable when I need a tiny 256MB RAM Server with <1GB/mo of data transfers) thanks, -Randy

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Cisco ME3400
by Holmes,David A 29 Feb '12

29 Feb '12

Anyone with advice on the ME3400 which some telcos use for Metro Ethernet Forum (MEF) services? Specifically looking for layer2 vs layer 3. At Layer 2 NNI/UNI vs dot1q qinq vs private VLANs. At Layer 3 multiple VRF CE/PE support. Specifically which connectivity options have been found to be most reliable and scalable. ________________________________ This communication, together with any attachments or embedded links, is for the sole use of the intended recipient(s) and may contain information that is confidential or legally protected. If you are not the intended recipient, you are hereby notified that any review, disclosure, copying, dissemination, distribution or use of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by return e-mail message and delete the original and all copies of the communication, along with any attachments or embedded links, from your system.

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Re: [Outages-discussion] Recent outage in Australia affecting Telstra
by Jay Ashworth 29 Feb '12

29 Feb '12

----- Original Message ----- > From: "Gert Doering" <gert(a)greenie.muc.de> > > One of Telstra's downstream customers, a smaller ISP called Dodo, > > accidentally announced the global table to Telstra (or perhaps a very > > large portion of it.) Enough of it to cause major disruption. > > This is good. There is a chance that Telstra will learn from it, and > do proper customer-facing filters now. > > OTOH, there also is a chance that Telstra lawyers will just sue the > customer, and not change anything... Perhaps. I am not familiar with Australian jurisprudence, but the US there is the doctrine of Last Clear Chance[1]... and the work necessary on Telstra's part to avoid this problem is a) well known, b) arguably considered best practice for a company in their field, and c) not disproportionately onorous for them to have undertaken... so even if they sue, it's not at all a clear cut case for them to "win". Cheers, -- jra [1] https://en.wikipedia.org/wiki/Last_clear_chance -- Jay R. Ashworth Baylink jra(a)baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274

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Alaska peering
by Mehmet Akcin 29 Feb '12

29 Feb '12

Hi I have read there was a discussion in 2010 regarding an IX in Alaska and whether it existed. seems like the most logical point to get to Alaska is Seattle. Is that still the case? Is there any peering point in Alaska? please contact me offlist if you know some colo / Internet service provider there. thanks. mehmet

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Time Warner Cable issues in Ohio ?
by Randy Carpenter 28 Feb '12

28 Feb '12

We're seeing some strange issues with our fiber connection to TWC in Ohio. Intermittent packet loss to/from some IPs. It gets as specific as from a certain IP outside our network, packets to a.b.c.10 are fine, but pings to a.b.c.50 (same subnet of same netblock) lose ~75% of the packets. Likewise, from one of our IPs, connections are fine to a particular remote host, but not to another host on the same network. Connections to/from some other IPs (and some whole networks) are totally fine. It almost seems that some piece of gear somewhere is barfing on packets that have a particular set of bits in the source and/or destination address. We have manually failed over to a backup connection, and are 100% fine now. I just want to see if anyone has seen anything similar, or has any info. I am on hold now waiting for someone at TWC. thanks, -Randy

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Call for updates: Native IPv6 access providers
by Jeroen Massar 28 Feb '12

28 Feb '12

Hi Folks, I would like to get more organizations on the Native IPv6 list: http://www.sixxs.net/faq/connectivity/?faq=native Thus, if you have updates and also new entries, do not hesitate to forward them to info(a)sixxs.net. Please provide the list of countries that you are offering the service, the name of the organization/company, the website, the IPv6 prefixes involved, the type of link/technology and any kind of notes that may pertain to your offering. Of course, if you are in the planning phase and know that around date XYZ you are going to offer the service too this can be put in the Notes column too... Yes, this list does not include Datacenter offerings, as when you have a simple Ethernet/routed network it you should have been able to offer IPv6 ages ago... Thanks for the input! Greets, Jeroen

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