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Changed Static Ip address

Hello,

I'm working on a job of switching over static ip address from one internet provider century link to another internet provider comcast. I'm starting to think I underestimated this static ip address change.
The current network equipment we have is
A century link modem with a static ip address
A netvana frame relay with a different static ip address - Also the static IP address that is in the netvana is the static ip that is pointing to the webserver that is linux flavored.
Also have a sonicwall pro 2040 I changed the static ip in there from centurylink to comcast
I'm running in to all kinds of issues and I would like some advise on a check list in order to change the static IP. It would be so much easier if I was the one that setup the network but it was done before me and worst part about I cannot contact the person that setup the network first. I have all the computers working they can access the internet. I'm running in to a few issues.
On godaddy under complete DNS control I need to change the static ip's there from the old static ip to the new static ips. one of those static ip is pointing towards the website. Does the static ip need to be setup in linux also how can I verify what static ip is setup in the linux webserver.
I'm pretty sure if I get the info updated correctly then accessing the website and also access the email server should be fixed.
Any help are suggestions is greatly appreciated thank you
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Wayne Michael
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Fr the purpose of seamless transition you need to define another of your sonicwalls ports as an external/WAN port into which you will connect your comcast feed.
Everything behind it should stay the same.

You would need to add firewall rules to allow traffic onto the comcast connection to the same internal system
I.e.
IP1 port 80 => internalIP 80
IP2 port 80 => internalIP 80

Make sure to setup a load balanced route out via either.

Depending in how long you have for both connections to coexist, you may need to use tagging on the sonicwall to make sure a request that came in over one connection has the response leave via the same path.

As far as DNS is concerned, you can have multiple www records, make sure to use low TTL (60,90 seconds). This will provide For the transition.
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ASKER

Hello,
Comcast is hooked up to the sonicwall right now the asterisk server is still working with century link along with comcast no problems so far.  Comcast modern is in complete bridge mode.  Still got a few issues to work out.  I added comcast  to firewall 10.1.10.1
             Centurytel
              /                  \
Internet                      Sonicwall <=> LAN
              \                   /
                  comcast

Not sure what the 10.1.10.1 reference with comcast means.
It helped me determine how to get a static ip on our website which was one step thanx.