Solved: Help Changing 5510 ASA Interface IP

stle0 · ‎07-16-2010

Dear All,

I am needing to change the internal IP scope for my network, however, when I make the change in my DCHP server I cannot change the Interface IP for my ASA 5510. Any ideas?

I have tried editing the Inside Interface Ethernet 0/1 AFTER the DHCP scope change and I lose communication along with several other errors. I have tried to edit the Inside Interface Ethernet 0/1 BEFORE the DHCP scope change and the same problems occur.

I have also tried disabling the Interface before making the change, however that didn't work either. I am guessing that there is a different area / way to change the IP for the Inside Interface Ethernet 0/1 than what I am doing.... any help would be greatly appreciated.

Thank you in advance!

Nagaraja Thanthry · ‎07-16-2010

Hello,

I am assuming that you are using ASDM to access the firewall and making

changes in the ASDM. Please follow the steps below:

1> Through the ASDM, delete the DHCP scope on the firewall

2> Add the new IP range to the allowed addresses that can access ASDM

through HTTP (http 0 0 inside is a better option)

3> Now change the IP address on the inside interface

4> Configure a PC statically so that it has an IP in the same range as the

ASA's inside IP

5> Now access the ASA through the new IP from the statically configured PC

6> Now reconfigure the DHCP scope

Hope this helps.

Regards,

NT

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Nagaraja Thanthry · ‎07-16-2010