Unsolved
2 Posts
0
3099
September 30th, 2021 01:00
Windows DHCP Server on VLAN with IP Helper-Address
I have a very simple setup VLAN 1 is default VLAN for wired network, VLAN 20 is used for WLAN, Windows DHCP server is connected to switch N1548 on trunked port 35, laptop is connected to switch on port 41 which is tagged VLAN 20. DHCP server has two scopes, one for each VLAN. Switch has IP addresses configured on both VLANs and IP HELPER-ADDRESS is configured on VLAN 20 pointing to IP of DHCP server. Clients on default VLAN 1 get IP’s issued from DHCP server without any problems. Laptop on VLAN 20 does not get an IP address from the DHCP server.
interface vlan 1, ip address 10.11.0.17 255.0.0.0
interface vlan 20, ip address 192.168.20.17 255.255.255.0, ip helper-address 10.0.0.1 dhcp
interface Gi1/0/35, switchport mode trunk (DHCP server 10.0.0.1 on this port)
interface Gi1/0/42, switchport access vlan 20 (laptop on this port
show ip helper statistics shows client messages being relayed but no replies from server
DHCP client messages received.................. 788531
DHCP client messages relayed................... 37903
DHCP server messages received.................. 0
DHCP server messages relayed................... 0
If I assign a static IP on VLAN 20 (192.169.20.x) to laptop on port 41 then I can ping the DHCP server address ok. I am not a switch expert by any means but still cannot see what I am doing wrong / missing. Routing between VLANs maybe ?
DiegoLopez
6 Operator
•
2.7K Posts
0
October 1st, 2021 00:00
Good morning @RogerGore,
We cannot directly help on configurations as there are Dell professional services who can help you set up a custom configuration for your environment. Please, let me know if you need those services to establish the DHCP configuration in your environment.
Now, for sure we can offer you some help and guidance. First of all, I would recommend you to check the User’s Configuration Guide: https://dell.to/3kX51Ks You have information on page 95 related to VLAN configuration and on 102 regarding VLAN routing.
You also have information regarding DHCP configuration. Your N1548 may have integraded an own simple DHCP that you can use if you are not skilled on network configuration.
I hope you find this information useful.
Regadrs.