Can't ping outside IP address

Question

Our firewall is Cisco ASA and our switch catalyst 2960.

One computer keeps having the following problem :

Once for a while (in one or two days), the computer can't ping outside IP address like 4.2.2.2 and 8.8.8.8. The computer can ping inside network resources such as printers and servers.
When this occurs, the computer can't access the internet.
Renewing IP doesn't fix the problem. We must change it to the static IP adders to make it work again. However, the problem comes back in a couple hours.
We have replaced the computer and make sure the NIC driver is up to date. We even changed the switch port connecting to the computer.

What could be the problem?

How is this a problem? Why do you care if the computer can ping outside addresses? What's the real problem? — joeqwerty, May 24 '18 at 19:32
Because it can't access to the Internet. Now, I find more and more computers have this issue. When that happens, the computer can't access the Internet and we can't ping ASA inside. Tracert is all timeout. — chicagotech, May 25 '18 at 20:26
How many computers do you have on the subnet? Is it possible you're running out of addresses? When a computer can't reach the internet, what IP address does it have? — Ron Trunk, Aug 12 '19 at 12:56

score 0 · Answer 1 · answered Aug 12 '19 at 11:28

If you have more and more computer having this issue, and configuring static IP solves the problem, have a look at dhcp configuration.

If the network range configured in dhcp is /24 and you start having more than 252 computers, you are likely to have trouble.

1 Answers1