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Safar Safarov
Beginner

DNS forwarding issue on 2821 ISR

Hello,

I have configured DNS forwarding on my Cisco 2821 to ISP DNS servers and configured router as a DNS Server for all of desktops/laptops I use. Everything work correct but only for 48 hours (approximately), then I cannot access/ping several websites (note that only couple not all) until DNS cache of the router is cleared. After issuing clear host all * everything is ok for next 48 hours...

Is there any way do fix that?

Thanks.

3 REPLIES 3
paolo bevilacqua
Hall of Fame Master

Likely a bug, update IOS.

Updated, the same issue occur... any ideas?

Safar Safarov
Beginner

Is there any way to configure clearing dns cache automatically? Maybe I missed smth in config?