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We're about to switch from our old ISP to a new one. How do I assign static ISP-assigned IP CISCO ASA interface? Should I define it under NAT or Access Rules? Is it easier through console?

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2 Answers

up vote 2 down vote accepted

You assign the interface IP under interfaces.

(Configuration->Device Setup->Interfaces)

ASDM vs Console is a matter of preference. I stopped using the console after ASDM 6.x got launched, as you can do everything there.

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Found it! Thanks! Could I still keep my old ISP ip just as a backup? I am assigning the new one for outside network. – servercooler Oct 27 '11 at 16:04
Yes, you could - but then you'll need to use another interface or create VLAN's (wich requires a managed L2 switch at a minimum) – pauska Oct 27 '11 at 17:52
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up vote 1 down vote

In the ASDM, it's under "Interfaces".

On the command line:

interface g0/X
 ip address 192.0.2.45 255.255.255.0

And you'd probably also want a route for your new ISP, depending on exactly how you're coordinating the cut-over..

route outside 0.0.0.0 0.0.0.0 192.0.2.1 1
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Is route outside for setting up the gateway? – servercooler Oct 27 '11 at 16:08
@servercooler Yes indeed. – Shane Madden Oct 27 '11 at 16:09
Can I assign more than one ip? – servercooler Oct 27 '11 at 16:23
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