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North American Network Operators Group

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Re: Proper authentication model

  • From: Joe Abley
  • Date: Wed Jan 12 10:56:28 2005

On 12 Jan 2005, at 10:16, Hannigan, Martin wrote:

If you have 3 sites and they're interconnected via an OC3
and the internet, you would also have 2 frame or ppp circuits
seperately connecting the terminal server network. You'd do the
different path, different provider, etc. on these circuits.
You mean you'd *request* a different path from different providers.

That's not the same thing as getting paths with no points of failure in common. How many times have you seen an OC3 service bought from one provider share the same conduit, or the same piece of fibre as a DS1 frame-relay service bought from a different provider? Often enough to post paranoid rantings to NANOG, in my case.

In the past I have been attracted the idea of console servers with GPRS modems in order to eliminate local-loop shared fate (since there is an argument that the amount of shared infrastructure in two apparently separate services will reduce dramatically the further you get away from the service delivery point). However, the colocation centres where GPRS coverage is good enough to use in any serious way are probably the ones with microcells installed within them, which presumably use the same fibre and the same conduits as everybody else to haul packets out of the building.


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