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arhc

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procedure to shift from one ISP to another

Hi Friends,

I want to change my ISP for some reasons.
so please guide me what all changes i have to do in my network.
i have a cisco 877 router with no branches.
cisco firewall ASA.
Hosting of my domain name.

please guide me the correct procedure.

regards
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Member_2_4890156
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Is the OLD ISP hosting your Domain name?
What ISP are you using, ie cable, dsl, t1 t2 t3? what do you want to change to?
Change of ISP means change of IP's, not a complicated deal. Just you need to change all your public IP's in your router and ASA with the new ones.

So basic main change will be in router/ASA config regarding replacements of IP's.

Domain hosting, if your present ISP hosts that, you understand that you have to shift it. Either choose your new ISP or hire the professional hosted services.

You can also host your domain yourself, only need to register your new IP's for website with the registrar.
The above assumption is based on you are not changing technology, e.g you are just changing ISP from DSL to DSL and not DSL to AVPN.
Then, there will be a substantial change in config.

You can paste your detailed old config and new requirements, we will help.
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arhc

ASKER

Thanks for your comment surbabu.
ya i am changing from DSL to DSL .
My domain is hosted at my old ISP.
And should i have to change the name server also.
How many hours it is taking to publish my MX record.

 
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nwhitaker2
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--> How many hours it is taking to publish my MX record

just remeber, in addition to changing your MX record you will also need to update the A or CNAME record that your MX record points two.

Is this a hard cut over?  Meaning one second you are on your old ISP and the next you are on the new ISP?

Or will there be some overlap period where you are on both?  If there is a overlap period, then you can add a second MX record pointing to a new host name with a match A record that points to your new IP address.  That way both will be active.  72 hours after you new records have been active you can then delete the old MX and A records.  
@arhc, you should consider transferring your domain hosting to some professional services(not any ISP), because

1) It will be independent of your internal network infrastructure change.

2) You will not have any downtime if you change your internal network.

3) Your domain will be independent of your ISP.

Changing of name server is not always mandatory, but of course pointing to the DNS of your host company will make it fast for you.

You do not have to worry about any cutover or change of ISP ever, if you host it to professional domain service/web service providers. Try to select the people who are official registrar of domains.

Changing of ISP does not mean necessarily that you have to take web service off, from them. Why don't you change the DSL line to a new ISP and keep the hosting service with your old ISP?


Best,