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On Sunday 13 November 2005 12:03 pm, kashani wrote: |
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> Edward Muller wrote: |
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> > You will need at least 3 ip addresses. One ip for each box and one |
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> > 'floating' ip for the services (like http, smtp, pop, etc). Having the |
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> > boxes at two separate ISPs is impossible since you won't be able to get |
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> > them to fail over the 'floating' ip address, unless they really know what |
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> > they are doing (both of them). |
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> |
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> It's not a matter of the ISP's knowing what they are doing. It's that |
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> no ISP will announce a host route, x.x.x.x/32 into BGP. And if any ISP |
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> is retarded enough to announce it, no other ISP will accept it. So |
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> unless you're prepared to shift at minimum an entire class C, |
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> x.x.x.x/24, from one colo to the other any sort of IP sharing scheme is |
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> impossible. |
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That's true. I spoke too soon and wasn't thinking, much. :-) But the point is |
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still valid that failing over an ip address (or even a lot of them) is a |
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non-trivial task that requires co-operation from your ISPs. |
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> |
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> kashani |
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|
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-- |
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Edward Muller - Interlix |
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edwardam@××××××××.com |
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417-862-0573 |
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PGP Key: http://interlix.com/Members/edwardam/pgpkeys |
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