Internet Access Russian Dolls

I was stunned when I've figured out my ISP uses PPP-over-Ethernet in FTTH environment. After the initial shock, the solution started to look more promising.

Read the whole article in Fragments, the official NIL blog

7 comments:

  1. Modern switches can use "option 82" to pass customer port number and "switch id" to DHCP-server. Dynamic ARP inspection and IP source guard can prevent "packet injection".

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  2. IP over Avian Carriers is classical "long-haul" technology. For shorter distance RFC 1926 is better choice.

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  3. Well, I'm a bit surprised that you are surprised about this... ;-)
    Here in Germany, Deutsche Telekom provides its customers FTTC-based VDSL-lines with IP-DSLAM's, so this is quite compareable, and they use PPPoE too.
    Honestly, I don't even know if any ISP uses DHCP for access lines here in Germany... (nearly 99,99% use PPP, PPPoE and / or PPPoA I guess)
    Another argument for this solution is that you can easily deploy MPLS-VPN's using the same concept. You just have to add a RADIUS-Attribute...

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  4. like you say in fragments, much better for security

    the sad thing is, how many people are going to be running these connections on little crappy home-use routers whose cpu maxes out at 8-10mbps?

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  5. This opens the market for dedicated high performance PPPoE optimized network adapters. :)

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  6. @visir: Thanks. I learn something new every day :)

    @A#1: Definitely a better choice for Metro service. But I guess we need a newer version of the standard. If we'd switch to ultrasound (avoiding the range used by bats to decrease background noise), we could drastically increase the transmission speed.

    @A#2: I'm not surprised. Now I also know where my SP got this bright idea.

    @A#3: You're right ... but in the end, the SP always wins. They give you low-cost crappy router that cannot saturate the link you're paying for, so they lower the overall utilization.

    @A#4: I don't think this is an issue on any decent PC/workstation.

    And, please, would you finally start using nicknames. Trying to sort out replies to four anonymous commenters is not fun :D

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  7. By "dedicated high performance PPPoE optimized network adapter" I mean PCI Express ten gigabit ethernet card with hardware acceleration for PPPoE able to transmit/receive and processing PPPoE frames at the full wirespeed. :)

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Ivan Pepelnjak, CCIE#1354, is the chief technology advisor for NIL Data Communications. He has been designing and implementing large-scale data communications networks as well as teaching and writing books about advanced technologies since 1990. See his full profile, contact him or follow @ioshints on Twitter.