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Windows 2022 DHCP/DNS Server & Catalyst 2960 Not Passing IPs

brownhombre
Level 1
Level 1

I've inherited a problem...

I have a 2960 Stack at work with a blade running Windows Server 2022. The Windows Sever has a new VLAN (172.27.41.0/24) built out with the DHCP scope 172.27.41.25-254. (*Note, you'll also see some trunking for VLAN 21... this will be activated later but for right now I'm only working with VLAN 1 or .6.0 and VLAN 41 .41.0)

The original single VLAN before the one above was created was 172.27.6.0/24 with a similar DHCP IP address range to be handed out.

I've trunked the port connected to the blade to VLAN 1,41 (interface GigabitEthernet1/0/3)... set the gateway to the switch 172.27.41.1... connected my laptop to an open port with switchport access VLAN 41 (
interface GigabitEthernet1/0/19)  and waited to get an IP but no luck.

Attached is the config file to the switch. Any help understanding where I'm going wrong would be helpful.

8 Replies 8

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello @brownhombre ,

there is no file in attachment.

However, under SVI interface vlan 41 check if you have configured:

int vlan 41

ip helper-address <DHCP-server-IP-address>

Hope to help

Giuseppe

 

Apologies. I thought I uploaded it.

 Add only vlan to SW via

Vlan xx

And IP helper not config under vlan 21

MHM

balaji.bandi
Hall of Fame
Hall of Fame

I agree @Giuseppe Larosa suggestions, also we did not see your network diagram to suggest more here.

 

I've trunked the port connected to the blade to VLAN 1,41 (interface GigabitEthernet1/0/3)... set the gateway to the switch 172.27.41.1... connected my laptop to an open port with switchport access VLAN 41 (
interface GigabitEthernet1/0/19)  and waited to get an IP but no luck.

i would like to see this configuration on the switch and where the server connected port configuration.

is the VLAN 1 getting the IP address from DHCP server ? make sure switch you created a VLAN 41 

is the switch acting as Layer2 or Layer 3 ? is the gateway is default-gateway ? if the switch acting as layer3, this need to replace with ip route x.x.x.x x.x.x.x y.y.y.y (enable ip routing - depends on the code on switch, some latest code ip routing enabled)

 

BB

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How to Ask The Cisco Community for Help

 

Hello
I see no attach cfg file?

In any case , -do you have "ip routing" enable on the switch?
conf t
ip routing


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

My apologies. I attached it now.

brownhombre
Level 1
Level 1

Here is the config file. I thought I uploaded it the first time.