Update MS DNS server from cisco 3750 DHCP

[omessadi]

Hello, 

I

I would like to know how to update my DNS server, which is in a DMZ, from my swtich 3750.
The addresses are as follows:
DC + DNS: 172.16.90.1/24

DHCP Vlan 10
network 172.16.10.0/24
default-router 172.16.10.254 ==> Int vlan 10
dns-server 172.16.90.1 172.16.90.2
domain-name test.local

Thank you

[MHM Cisco World]

can you more elaborate ?

[omessadi]

for example, when a computer gets a DHCP lease, how do I automatically register it on the DNS from the cisco 3750?

[MHM Cisco World]

but you config the DNS under the DHCP Pool, so the client sure get it when ask IP from FW.
do you face issue with DNS?

[johnd2310 · Accepted solution]

Hi,

I don't think the 3750 switch can dynamically update dns. Your best option is to configure the clients to update dns. Usually on Windows machines, the option to update/register connection in dns is enabled by default. Have you checked that the clients can register with you dns server? You might need to check that port 53/TCP is allowed from clients to dns server.

Thanks

John

[omessadi]

Thanks a lot