We have a fiber based connection from our ISP that uses an on-prem Edgewater device. The connection uses a /29 IP block with the first IP as the gateway, the second IP reserved for the ISP's voice server (Edgewater device itself maybe?) and the third IP I am using for an SA520 firewall.
I am trying to switch out the SA520 for the ASA5506-X but when I do the ASA fails to ping the first IP of the block and therefore does not get out to the Internet. I tried using the remaining IPs in the block and still no go. The ISP says all is fine and indeed, if I test with a laptop all the IPs appear to work perfectly.
The ASA works OK at other sites so I kept troubleshooting and found something interesting. I noticed that the ASA is able to ping the default gateway for a few seconds after it is connected and then it stops. I started playing around with the MAC address of the ASA and found that each time I change the MAC address to some random address it will ping the default GW for a few seconds and then stop.
I am not sure what this means but I am pretty sure it can be used to solve the problem. Before I forward this info to the ISP I wanted to get some feedback so I can help solve this. Thoughts?
Rgds,
Diego
