topic Re: VOSS - IP DHCP-SERVER TRICK in ExtremeSwitching (VSP/Fabric Engine)

VOSS - IP DHCP-SERVER TRICK

EF — Thu, 01 Feb 2024 10:32:25 GMT

Hi Team,

I want to share my first dhcp-server config lab on VOSS:

1.- Mandatory, mgmt CLIP interface:

mgmt clip
ip address 1.1.1.1/32
enable

2.- Create VLAN, L3 interface and assing it to a port:

vlan create 666 name DHCP type port-mstprstp 0
interface vlan 666
ip address 192.168.69.1 255.255.255.0

vlan member add 666 1/4

3.- DHPC-SERVER subnet

ip dhcp-server subnet 192.168.69.0/24
pool 192.168.69.100 192.168.69.200
router 192.168.69.1
domain-name-servers 8.8.8.8 8.8.4.4
domain-name dhcp.int
lease-time 86400
enable

4.- Enable it globally

ip dhcp-server enable

At this point the server doesnt work, in order to work you must enable dhcp-server relay on VLAN to mgmt CLIP

5.- Enable DHCP-RELAY

interface vlan 666
ip dhcp-relay fwd-path 1.1.1.1 enable
ip dhcp-relay

I hope you find this usefully.

Cheers!!

Re: VOSS - IP DHCP-SERVER TRICK

RobertD1 — Fri, 02 Feb 2024 08:59:57 GMT

Thanks for sharing EF. This is new in release 9.0.0.0 I believe.

Re: VOSS - IP DHCP-SERVER TRICK

Ed_Z — Wed, 01 Jul 2026 14:54:37 GMT

The syntax in Step 5- is incorrect and incomplete.

My suggested syntax is:

5.- Enable DHCP-RELAY

interface vlan 666

ip dhcp-relay

exit

ip dhcp-relay fwd-path 192.168.69.1 1.1.1.1

ip dhcp-relay fwd-path 192.168.91.1 1.1.1.1 enable

# next line is optional

ip dhcp-relay fwd-path 192.168.91.1 mode bootp-dhcp

Re: VOSS - IP DHCP-SERVER TRICK

EF — Wed, 01 Jul 2026 15:00:07 GMT

Yes, you are right!! Sorry for mistake.

Thanks a lot