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Created on ‎08-22-2007 02:00 AM

DHCP relay is not working

We have two FGt 3000 in a cluster. We have a DHCP server connected on our management VLAN which serves a lot of the customers connected on individual VLANs. The DHCP requests are relayed to the DHCP server. Shortly after update to MR5 the DHCP relay function stopped working. I can see the DHCP request on the interface where the requesting device is connected, but nothing on the interface where the DHCP server is connected. Is ther anyone who ca give me a hint on what may be wrong? Thanks Magne
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16 REPLIES 16
Carl_Wallmark
Valued Contributor
In response to

Created on ‎09-05-2007 09:06 AM

i was having problems when i configured DHCP relay, but then i played around with STP and RSTP on the switches, then it worked perfect. in my solution i have 2 FG 200A in a cluster A-P with 2 VDOMS (1 NAT, 1 TP) and with 120 VLANS, and every VLAN have its own IP network, and every VLAN is using the same DHCP server. So my problem was the Spanning Tree protocol in the switches (HP Procurve).

FCNSA, FCNSP
---
FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30B
FortiAnalyzer 100B, 100C
FortiMail 100,100C
FortiManager VM
FortiAuthenticator VM
FortiToken
FortiAP 220B/221B, 11C

FCNSA, FCNSP---FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30BFortiAnalyzer 100B, 100CFortiMail 100,100CFortiManager VMFortiAuthenticator VMFortiTokenFortiAP 220B/221B, 11C
934
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Not applicable

Created on ‎09-07-2007 03:50 AM

That solved my problem. Thank you very much.
934
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Carl_Wallmark
Valued Contributor

Created on ‎09-07-2007 09:36 AM

Ohhh, i have helped my first " customer" , im not a virgin anymore =) Wheres the beer ???????

FCNSA, FCNSP
---
FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30B
FortiAnalyzer 100B, 100C
FortiMail 100,100C
FortiManager VM
FortiAuthenticator VM
FortiToken
FortiAP 220B/221B, 11C

FCNSA, FCNSP---FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30BFortiAnalyzer 100B, 100CFortiMail 100,100CFortiManager VMFortiAuthenticator VMFortiTokenFortiAP 220B/221B, 11C
934
0 Kudos
rwpatterson
Valued Contributor III
In response to Carl_Wallmark

Created on ‎09-07-2007 10:40 AM

I thought it was a cigarette??

Bob - self proclaimed posting junkie!
See my Fortigate related scripts at: http://fortigate.camerabob.com

Bob - self proclaimed posting junkie!See my Fortigate related scripts at: http://fortigate.camerabob.com
934
0 Kudos
Carl_Wallmark
Valued Contributor

Created on ‎09-07-2007 01:38 PM

thats just in the movies =)

FCNSA, FCNSP
---
FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30B
FortiAnalyzer 100B, 100C
FortiMail 100,100C
FortiManager VM
FortiAuthenticator VM
FortiToken
FortiAP 220B/221B, 11C

FCNSA, FCNSP---FortiGate 200A/B, 224B, 110C, 100A/D, 80C/CM/Voice, 60B/C/CX/D, 50B, 40C, 30BFortiAnalyzer 100B, 100CFortiMail 100,100CFortiManager VMFortiAuthenticator VMFortiTokenFortiAP 220B/221B, 11C
934
0 Kudos
Yngve0
New Contributor II
In response to Carl_Wallmark

Created on ‎09-10-2007 06:09 AM

Unfortunately; My issue is not solved and Fortinet have now idee neither. My issue is -DHCP -server (windows 2k3) is located on HQ, connected to FG200A - All sub-office running DHCP-relay against central DHCP-server. Suboffice have FG50A, FG60 or FG50B with VPN-connection in interface-mode to HQ. Mainly there are a VLAN-switch(D-link 3010) connected to internal interface and multiple VLAN on each site. This was working problemless until upgrading to MR5. Y
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Not applicable
In response to Yngve0

Created on ‎09-14-2007 02:27 AM

Have similar configuration here: - DHCP server (linux based) in main location with a cluster of 2 300A - secondary office with DHCP relay through interface mode VPN with a cluster of 2 100A We had some trouble after the upgrade to MR5 patch 1 (build 564) with both normal traffic and DHCP requests disapparing crossing the VPN tunnel. It seems that a bring down - up on the virtual interface and a disable - enable on the DHCP relay solved the problems, it' s running problemless since 1 day ago. Hope this can help Marco
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