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Im pretty new to the topic, Im an electronics engineer so im naturally missing something in my IT config :-)

im trying to set up a network for a non-profit organisation (small sports club) with the existing hardware:

the ISP modem - 192.168.25.1

a L3 switch/router ProCurve2626 - 192.168.25.2

A freshly installed windows Server 2019 for DHCP - 192.168.25.3

Server is set up with 3 scopes:

vlan1 -

192.168.25.50 - 192.168.25.230

router/gateway: 192.168.25.1, DNS:192.168.25.1

vlan10 -

192.168.26.5 - 192.168.26.254

router/gateway: 192.168.26.2, DNS:192.168.25.1

vlan20 -

192.168.27.5 - 192.168.27.254

router/gateway: 192.168.27.2, DNS:192.168.25.1

Switch config:

hostname "ProCurve Switch 2626" ip default-gateway 192.168.25.1 ip routing snmp-server community "public" Unrestricted vlan 1 name "management" untagged 1-4,13-26 ip address 192.168.25.2 255.255.255.0 ip helper-address 192.168.25.3 no untagged 5-12 exit vlan 10 name "mitglieder" untagged 5-8 ip address 192.168.26.2 255.255.255.0 ip helper-address 192.168.25.3 tagged 13-15 exit vlan 20 name "gaeste" untagged 9-12 ip address 192.168.27.2 255.255.255.0 ip helper-address 192.168.25.3 tagged 13-15 exit gvrp ip route 192.168.27.0 255.255.255.0 192.168.25.1 ip route 192.168.26.0 255.255.255.0 192.168.25.1

I get a DHCP adress when im plugged into a port untagged with Vlan1, but not on Vlan10 or Vlan20, does anyone see what im doing wrong/ what's missing?

in wireshark i see a DHCP Discover, source is the switch, destination the DHCP server

any hints would help, best wishes

Jonny

j0nnyda
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  • The Windows server isn't your DHCP Helper (relay) unless you installed the RRAS role and configured it as a DHCP relay, which I'm guessing you didn't. Why not use the switch as your DHCP relay? – joeqwerty Mar 30 '20 at 13:07
  • i changed the IP helper address to the switch (vlan10 ...26.2 and vlan20 ...27.2,) now I dont even see the Discover anymore. What am i doing wrong? it's my 4th day of struggling with this problem – j0nnyda Mar 30 '20 at 15:09
  • I'm certain that you have to enable the DHCP relay service on the switch. You'll need to make sure that the switch is also performing inter-vlan routing. – joeqwerty Mar 30 '20 at 15:28
  • Thanks so far! DHCP relay is enabled, how would the routing have to look like? Do i need to have a route from vlan10 to the DHCP? -like ip route 192.198.26.0/24 192.168.25.3 – j0nnyda Mar 30 '20 at 15:43
  • With a Cisco switch you would simply enable ip routing. I'm assuming it's the same with an HP switch. You shouldn't need to manually create any routes. – joeqwerty Mar 30 '20 at 16:55
  • Im going crazy... it still does not work, why can i see the Discover on wireshark on the server but no answer? Is the only possible reason routing options? – j0nnyda Mar 30 '20 at 17:32

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