DNS used with DHCP for Local Nodes

[GCloutier167]

I have a specific lab that uses a DNS & DHCP server.

On the DNS server, i have entered a few websites & a few computer IP address (PC0 = 192.168.0.10, PC1 = 192.168.0.20, etc.).

Fairly straight forward when IP address are static. When using a DHCP for dynamic addresses, how do i configure my DNS (PC0 = Variable address from DHCP server??).

Thank's for any input on this "simple" question that's giving me trouble.

Regards

[Martin L]

If you use DHCP server with pools to give away IPs, there is a setting for DNS and default gateway. Drag server icon and look under service tab GUI .  There are some examples in every PT install. look for File > open samples and find dhcp example

if you use a router as DHCP server, configure a pool for LAN with following dns service

ip dhcp pool MARTIN

network 10.1.0.0 255.255.255.0

default-router 10.1.1.1

dns-server 8.8.8.8

You can attach your PT file here (must be in a zip format).

Regards, ML
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[Martin L]

If you use DHCP server with pools to give away IPs, there is a setting for DNS and default gateway. Drag server icon and look under service tab GUI .  There are some examples in every PT install. look for File > open samples and find dhcp example

if you use a router as DHCP server, configure a pool for LAN with following dns service

ip dhcp pool MARTIN

network 10.1.0.0 255.255.255.0

default-router 10.1.1.1

dns-server 8.8.8.8

[GCloutier167]

Hello Martin & thank's for your feedback. I have included my "simple" network.

From PC1, i'm trying to ping PC0. I think my config is good, but in the DNS server, i have to enter PC0's address. Which is easy when using static addresses. If using DHCP, i am not certain how to associate in the DNS a node to a variable address.

[MHM Cisco World · Accepted solution]

friend you need DDNS

https://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/811-cisco-router-ddns.html

[GCloutier167]

Thank you so much!! That's exactly it

[MHM Cisco World]

You are so so welcome 

[Martin L · Accepted solution]

DDNS does not work in or with PT;

PT is just a sim to simulate real IOS; it is not real IOS, not all features are included and those that are may or may not behave as real IOS or device (Cisco and not)

Regards, ML
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