Re: Switching ISPs


Richard Simmons wrote:
Thank you very much for your reply.

I should have clarified a bit further I suppose.

What I am now thinking of doing is updating our DNS records, but there
will be a lagtime for the new addresses on the servers to be updated
with the new addresses, so in the interim, some traffic will continue
to a servers a.a.a.x (old ISP address),.

Thank you for the information on the servers always replying from the
address the packet was recieved on. I thought this should be the case,
but when there is a microsoft server involved, I am a bit uneasy
(some servers are Win2k, others are *NIX boxes)

I think you are right on the convincing the new ISP to temporarily
allow the outgoing traffic, this would be something I could quick test
as well, and switch back until resolved. Then move on to the DNS
updating.

Thanks again,

Hi
how about using NAT. this way you will have two simutaniously working
IPs for the same server:
old ip which has DNS pointed to, and new IP. After DNS change, you
still need to wait x amount of time so it propogates around the globe.
then you just delete NAT and enjoy.


Roman Nakhmanson

.

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