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29 Mar '11

Hello, I have a BRAS (Terminating several thousand PPPoE sessions), and today I use simple static routes pointing to the bras for customer routes. I want to improve this model and allow for failover and so forth, and I would like instead for my customer routes to be entered into my igp so if they move around, the routes can follow them. I was wondering if iBGP may be sutaible for this task - there will always be a steady stream of route updates as customer connect and disconnect, mostly in the range of /32's and /29's. BGP seems way superior to ospf for this because of it's excellent filtering and other capabilities, but never having done this on a large scale with the potential for updates as I said, I was hoping someone could make a clear case for or against it. The client routes would not have to be propagated all across my network so updates don't really have to go far; I could certainly summarize these routes easily at a core router 1 hop from my bras for example, with that router(s) knowing the final hop from ibgp. I just want them to be able to float between bras and I can even tolerate a few seconds of route instability (hey, if you want stability then don't keep redialing; nail the pppoe up and leave it up!) Thank you Oh wizend ones (!), Mike-

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What is this Cisco process?
by Joe Renwick 29 Mar '11

29 Mar '11

Hello, Have a Cisco 3560 running "flash:/c3560-ipbasek9-mz.122-55.SE1.bin". Been running at 20% CPU since we started it: [image: plf-access - CPU Usage] The switch is completely layer-2... basic configuration. CPU utilization is soley based on a single process: plf-access#sh proc cpu sorted CPU utilization for five seconds: 27%/0%; one minute: 25%; five minutes: 24% PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process 41 232891470 1072247 217210 20.12% 18.99% 18.01% 0 SFF8472 78 2376721 123621 19225 0.95% 0.22% 0.17% 0 HULC Tcam Memory 303 299 163 1834 0.47% 0.23% 0.07% 2 SSH Process 55 106535 11303527 9 0.15% 0.02% 0.00% 0 RedEarth Tx Mana Anybody have a clue what this process is? Thanks for the time. Cheers, -- Joe Renwick IP Network Consultant, CCIE #16465 GO NETFORWARD! Direct: 619-800-2055, Emergency Support: 800-719-0504 Is your network moving you forward?

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Anyone have info on the Dallas Infomart power outage?
by Tim Connolly 29 Mar '11

29 Mar '11

Anyone have details?

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Regional AS model
by Zaid Ali 28 Mar '11

28 Mar '11

I have seen age old discussions on single AS vs multiple AS for backbone and datacenter design. I am particularly interested in operational challenges for running AS per region e.g. one AS for US, one EU etc or I have heard folks do one AS per DC. I particularly don't see any advantage in doing one AS per region or datacenter since most of the reasons I hear is to reduce the iBGP mesh. I generally prefer one AS and making use of confederation. Zaid

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Re: New tsunami advisory warning - Japan
by andrew.wallace 28 Mar '11

28 Mar '11

On Mon, Mar 28, 2011 at 1:59 AM, <Valdis.Kletnieks(a)vt.edu> wrote: > *yawn*. A foot and a half isn't going to be all *that* bad Remember a wall of tsunami water travels in general at approx 970 kph (600 mph), think about it.

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Re: New tsunami advisory warning - Japan
by andrew.wallace 28 Mar '11

28 Mar '11

On Mon, Mar 28, 2011 at 11:43 AM, Gavin Pearce <Gavin.Pearce(a)3seven9.com> wrote: >> travels in general at approx 970 kph (600 mph) > > True in the deepest parts of open ocean - upon reaching the shore-line > it'll be travelling a lot slower. You guys forget a lot of folks on the list are working on cabling ships and off shore platforms, its not all about what happens on shore in this industry. Andrew

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Creating an IPv6 addressing plan for end users
by Nathalie Trenaman 28 Mar '11

28 Mar '11

Hi all, In our IPv6 courses, we often get the question: I give my customers a /48 (or a /56 or a /52) but they have no idea how to distribute that space in their network. In December Sander Steffann and Surfnet wrote a manual explaining exactly that, in clear language with nice graphics. A very useful document but it was in Dutch, so RIPE NCC decided to translate that document to English. Yesterday, we have published that document on our website and we hope this document is able to take away some of the fear that end users seem to have for these huge blocks. You can find this document here: http://bit.ly/IPv6addrplan (PDF) I look forward to your feedback, tips and comments. With kind regards, Nathalie Trenaman RIPE NCC Trainer

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The growth of municipal broadband networks
by Paul Graydon 28 Mar '11

28 Mar '11

http://arstechnica.com/tech-policy/news/2011/03/133-us-cities-now-run-their… Ars Technica has a short article up about the growth of municipal networks, but principally a nice little 'hey check out this website' (http://www.muninetworks.org/communitymap) The whole scenario around municipal broadband networks in a hopefully unbiased nutshell: Increasing numbers cities and counties seem to be getting frustrated with what they see as the lack of progress in broadband speeds from their incumbent provider(s) (even after incumbent provider(s) have been approached requesting faster speeds) and are deciding to do it themselves. Chattanooga, Tennessee has become the poster child for the idea, able to offer 1Gbps to users and businesses at competitive prices ($150 pcm.) I'm curious how the feeling is on NANOG about shifting such provision towards municipal instead of corporations? I guess a rough summary of the competing views I've heard so far are: + It's fair and valid competition in the market, which is encouraging major ISPs to innovate instead of resting on their laurels and trying to do the bare minimum necessary to maintain their position and profits, an attitude that is stifling other economic growth? - Local government is sticking its nose in where it shouldn't, providing unfair competition and stifling normal market processes. Municipalities are operating on the false belief that large bandwidth will automatically bring silicon valley to them, without understanding the bigger picture. That it's time, money and resources better spent on tax incentives or other means of encouraging businesses. Paul

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New tsunami advisory warning - Japan
by andrew.wallace 28 Mar '11

28 Mar '11

More information from http://www.jma.go.jp/en/tsunami/ Andrew

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Using Region-X assigned IP space in Region-Y?
by Mark Leonard 28 Mar '11

28 Mar '11

Hello NANOG'ers, This is a question that popped into my mind recently. So far my google-fu has not turned up anything of use. Imagine a company that has an RIR-assigned IPv4/23, and has it subnetted into a pair of /24's so that they can have replicated datacenters in two different geographical locations each running its own BGP infrastructure (using the same ASN). As far as I can see, this is all fine and good assuming that these two sites are in the same RIR's domain. Is it possible/allowable to move one of these datacenters to a different geographical region with a different RIR and keep using the same two subnets, or will a new /24 need to be requested from the new RIR? If there's a book or reference that answers this question, please let me know - I'm willing to do as much research on my own as I can. Thanks!

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