Help Changing 5510 ASA Interface IP

Answered Question

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!

Correct Answer by Nagaraja Thanthry about 7 years 1 week ago

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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Correct Answer
Nagaraja Thanthry Fri, 07/16/2010 - 09:18
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  • Cisco Employee,

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

Ganesh Hariharan Fri, 07/16/2010 - 12:01
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    Member's Choice, February 2016

Hi,


Try to delete the interface and configure the interface once again in th below steps:-


ASA5510(config)# interface Vlan 1
ASA5510(config-if)# nameif inside
ASA5510(config-if)# security-level 100
ASA5510(config-if)# ip address 192.168.1.1 255.255.255.0
ASA5510(config-if)# no shut


Hope to Help !!


Ganesh.H

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