Does anyone multihome anymore?
Mike Tancsa
mike at sentex.net
Wed Aug 22 20:32:55 UTC 2007
At 03:26 PM 8/22/2007, Steve Gibbard wrote:
>Thought about that way, there's nothing "Draconian" about turning
>off a connection (or a switch, or a router, or any other redundant
>component) that's not doing what you want it to.
While I agree in general with what you are getting at, one point to
add is cost. All these goals are constrained within a business case
to make. In my case, I could turn off my Cogent connection, but I
would have ended up punishing connectivity to other networks that are
off Cogent in Toronto only. This would have forced them to get to me
via Cogent's pop in Chicago, which was overloaded. So to fix my
connectivity into AS577, I would have to hose another group of users
in Toronto. Now I could of course add more diversity by adding
another connection in Toronto. But, I have to justify the business
case to do that. Is it worth the extra money for the few times this
particular type of outage happens ? In my case probably not. The
cost to privately peer with 577 is quite high and there are no good
transit providers at 151 Front that have good connectivity to Bell
other than via Chicago.
> Instead, you're taking advantage of a main feature of your
> design. If your other providers are doing 95th percentile billing,
> you even have a day and a half per month that you can leave a
> connection down at no financial cost. The alternative, as you seem
> to have noticed, is to spend your day stressing out about your
> network not working properly, and complaining about being
> helpless. You don't need redundancy for that.
I didnt mean to sound complaintive. My original post to NANOG was
more of trying to get details as to what was going on beyond the
rather basic info 1st level support and the cogent status page was
saying. After the original post, various questions / comments came
up as to what could and could not be done in this situation.
---Mike
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