09-07-2016 11:11 AM
Hello Cisco land. My problem, we are about to shut down an old dns server, address 208.xxx.xxx.xxx, but it looks like 600 people are still using it! What is the best command to use so when people try using the old dns (208.xxx.xxx.xxx) they get a response from the newer server (137.xxx.xxx.xxx) Both are attached to the same Cisco 4500x switch. I've attached a diagram of this issue. Thanks for any input.
Im thinking ip forward protocol or ip helper-address
09-07-2016 11:20 AM
Apparently I cant upload the pic, but here's this lol
Old DNS
Users |
Users ------------208.xxx.xxx.xxx dns ---------- Cisco 4500x Switch
Users |
New DNS (137.xxx.xxx.xxx)
09-08-2016 02:01 AM
How are the 600 people getting their DNS servers assigned, is it manual or dynamic with DHCP?
09-08-2016 08:08 AM
They were statically assigned at one time. I'm with an ISP. When they were converted to DHCP they must have left the DNS address in their CPE equipment or some customers put it in themselves.
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