DHCP relay for SGE2010

[support]

hi

I have SGE2010 switch in layer 3 mode and im unable to assign IP addresses in second VLAN 2.

My setup

Port 1: TRUNK , VLAN 1 and VLAN 2 --> connected to Cisco 887 FE3 Trunk with  VLAn 1 and VLAN 2 and DHCP pool for VLAN2

Port 2: TRUNK , VALN1 and WLAN2 --> Cisco Aironet 1040 LAN WIFI VLAN 1 and Guest WIFI VLAN2

Port 3: Access , VLAN1 Windows DHCP server for VLAN 1 subnet

My LAN WIFI clients can get IP from Windows DHCP server for VLAN 1

My Guest WIFI clients on VLAN 2 cant get an IP from the Cisco 887 router on VLAN 2.

I did try turning on DHCP relay etc but didnt make  any difference.

Can anyone give me some pointers on wat im missing ?

Thank you

[Tom Watts]

Hi, if the symptom is that when you assign an IP address to vlan 2 the switch "locks up" then the reason is because the vlan 1 did not have an IP address assigned by user.

To fix that, you'd need to add an IP address for vlan 1 as you like then try to make an IP for the additional vlans.

-Tom
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[support]

hi

The switch doesnt lockup ,I have assigned IP on Vlan 1 and Vlan2 interface.

The switch doesnt pass the DHCP requests for VLAN 2

[Tom Watts]

Hi, yes, DHCP relay would be the correct configuration and most likely need option 82. Your DHCP server would also need to support it.

-Tom
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