%SW_DAI-4-DHCP_SNOOPING_DENY after dhcp server migration

Hello,
Some weeks ago, we migrated our DHCP server (from windows 2003 to windows 2012 with the new failover features in active/passive mode).
On our switches ; we have both arp inspection & dhcp snooping enabled. Since the migration, arp inspection is not working correctly : as soon as i activate the arp inspection on our client vlan (96) ; we get errors like : "Sep 1 11:50:39: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/29, vlan 96.([d4c9.efdf.710e/10.0.96.89/0000.0c07.ac60/10.0.127.254/11:50:39 GMT+1 Mon Sep 1 2014])
Sep 1 11:50:40: %SW_DAI-4-DHCP_SNOOPING_DENY: 2 Invalid ARPs (Req) on Fa0/7, vlan 96.([d485.64b4.0068/10.0.97.214/0000.0000.0000/10.0.127.254/11:50:40 GMT+1 Mon Sep 1 2014])
If i have a look on the dhcp snooping binding table on the same switch :
NUKUH052#sh ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface
18:A9:05:F5:28:2B 10.0.97.101 418236 dhcp-snooping 96 FastEthernet0/40
6C:3B:E5:0D:B3:B2 10.0.96.184 2936 dhcp-snooping 96 FastEthernet0/36
10:60:4B:7C:A3:14 10.0.97.17 678739 dhcp-snooping 96 FastEthernet0/42
00:1F:29:02:AA:6B 10.0.98.53 678938 dhcp-snooping 96 FastEthernet0/37
88:51:FB:80:1B:E1 10.0.97.252 680212 dhcp-snooping 96 FastEthernet0/3
64:31:50:A3:F8:52 10.0.96.96 341484 dhcp-snooping 96 FastEthernet0/20
64:31:50:A3:D7:5A 10.0.97.209 677205 dhcp-snooping 96 FastEthernet0/6
6C:3B:E5:1A:8D:05 10.0.96.255 677165 dhcp-snooping 96 FastEthernet0/8
00:1F:29:02:AA:EF 10.0.96.207 678365 dhcp-snooping 96 FastEthernet0/1
00:23:7D:2F:72:E7 10.0.98.152 680376 dhcp-snooping 96 FastEthernet0/16
Total number of bindings: 10
Strange, interface FastEthernet0/7 is not in the table !!! and that s the same case for a lot of computers. (of course it s dhcp and not static ip address).
Extract of the switch configuration :
Standard port configuration
interface FastEthernet0/7
switchport access vlan 96
switchport mode access
switchport nonegotiate
switchport voice vlan 192
switchport port-security maximum 3
switchport port-security
switchport port-security aging time 1
switchport port-security violation restrict
ip arp inspection limit rate 256 burst interval 10
no logging event link-status
mls qos trust dscp
no snmp trap link-status
storm-control broadcast level bps 1m
storm-control multicast level bps 1m
storm-control action shutdown
spanning-tree portfast
spanning-tree bpduguard enable
General switch settings
ip dhcp snooping vlan 96
ip dhcp snooping information option allow-untrusted
no ip dhcp snooping information option
ip dhcp snooping
>> ip arp inspection vlan 96 : as soon as i had this command i have the error messages.
I already :
* tested several software version
* only enabled a single dhcp server in the helper address
But i don't find the issue... the problem came when we started up the 2 new dhcp server (with the new 2012 dhcp failover feature). We have the same issue on all the switches of this LAN (the same config is running fine on the other factory we own).
Can you help me to solve that issue ?

Hi,
I just attached the file containing the filtered caps ; taken simultaneously on both dhcp servers. As we are using HSRP ; it looks like the dhcp messages are not doubled, but quadruplet.
Below the HSRP configuration on one of our both core switches :
interface Vlan96
ip address 10.0.127.252 255.255.224.0
ip helper-address 10.0.9.33
ip helper-address 10.0.9.32
no ip redirects
standby 96 ip 10.0.127.254
standby 96 timers 1 4
standby 96 priority 80
standby 96 preempt
arp timeout 720
And i also discovered that there are some microsoft bugs related to dhcp failover. Links here :
http://blogs.technet.com/b/teamdhcp/archive/2014/02/26/dhcp-failover-patch-to-address-a-reservation-issue-and-another-issue-related-to-failover-partner-not-accepting-state-transition-from-bad-address-gt-active-has-been-released.aspx
and
http://support.microsoft.com/kb/2831920
And the active dhcp windows server has not been updated since january 2013.... (so the update are not applied). I ll discuss with my colleague in charge of server to update it asap...

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Hi all,
New forum member, first time poster. I am at my wits end and have concussion from banging my head on the desk for several days running. Hopefully someone here may be able to help.
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If anyone is able to provide any assistance that would be greatly appreciated.
Many thanks,
Hartz.
tldr; our printers are screwed since migrating to Windows Server 2008 R2.

Hi all,
New forum member, first time poster. I am at my wits end and have concussion from banging my head on the desk for several days running. Hopefully someone here may be able to help.
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I have recently moved our printing environment from a Windows Server 2003 machine to a new Server 2008 R2 machine in prep for rolling out Windows 7 x64 clients. We have 30-40 printers, majority of which are HP's (M2727's, P4015dn's, CM3530's, P2035's & a CM8060).
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Microsoft Certified Trainer
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Complete List of Technical Blogs: http://www.delawarecountycomputerconsulting.com/technicalblogs.php
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Hi Steffen,
Have you applied KB2919355 in the server?
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Steven Lee Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

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interface Vlan1
ip address 10.24.74.1 255.255.254.0 secondary
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001290: Jul 23 08:27:44.705 GMT: DHCPD: DHCPREQUEST received from client 013c.970e.233d.8d.
001291: Jul 23 08:27:44.705 GMT: DHCPD: client has moved to a new subnet.
001292: Jul 23 08:27:44.705 GMT: DHCPD: Sending DHCPNAK to client 013c.970e.233d.8d.
001293: Jul 23 08:27:44.705 GMT: DHCPD: broadcasting BOOTREPLY to client 3c97.0e23.3d8d.
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001297: Jul 23 08:27:44.725 GMT: DHCPD: setting giaddr to 10.24.76.1.
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Thank you in advance,

Just to help someone who has the same issue.
I found this on the web site:
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I have Checked that there is no way to make the DHCP Failover in Server 2008 R2.
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or
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Hello,
There is no big challenge for configuring DHCP failover in Windows 2008 platform. Kindly go through with this link for configuring DHCP failover. I am sure it will help you to completing your task.
1> Step-by-Step: Configure DHCP for Failover
http://technet.microsoft.com/en-us/library/hh831385.aspx
2> DHCP Step-by-Step Guide: Demonstrate DHCP Failover – Clustering in a Test Lab
http://technet.microsoft.com/en-us/library/ee405263(v=ws.10).aspx
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• Firstly, you can disable the DHCP role in Windows Server 2008 R2. However, if the Windows Server 2012 is down, the clients cannot renew their IP lease duration and obtain IP address.
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If clients cannot reach the primary server then they can get an IP configuration from the secondary server. Split scope deployment does not provide IP address continuity and is unusable in scenarios where the scope is already running at high utilization of
address space, which is very common with Internet Protocol version 4 (IPv4).
More references:
Step-by-Step: Configure DHCP for Failover (Windows
Server 2012)
How
to configure split-scope using wizard
DHCP
Step-by-Step Guide: Demonstrate DHCP Split Scope with Delay on a Secondary Server in a Test Lab
DHCP
Step-by-Step Guide: Demonstrate DHCP Failover – Clustering in a Test Lab
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http://blogs.technet.com/b/canitpro/archive/2013/04/29/step-by-step-migration-of-dhcp-from-windows-server-2003-to-windows-server-2012.aspx
http://www.mehrban.net/migrating-dhcp-from-windows-2008-to-windows-2012
Deepak Kotian.
MCP, MCTS, MCITP Exchange 2010 Ent. Administrator
Disclaimer:
Please take a moment to "Vote as Helpful" and/or "Mark as Answer", where applicable.
This helps the community, keeps the forums tidy, and recognizes useful contributions. Thanks!
All the opinions expressed here is mine. This posting is provided "AS IS" with no
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Really confused why the "answer" to this thread states it can't be done, when clearly it can. This is the official approach (article dated Oct 2013):
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Within, you'll see that it says:
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My Blog --
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I had two dhcp servers in windows server 2003 server , I have upgraded one of them to windows server 2008 32 bit and again i installed a windows server 2008 R2 as an additional Domain Controller , the last scenario was like this :
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thanks ...
MIMO

Are the clients on another network so you need to configure a DHCP relay agent?
If you load up perfmon on the dhcp server and remove all counters and then add DHCP counters. Do you see any dhcprequests when you reboot your dhcp clients? This will determine if your server actually receives any dhcp requests.
Have you check event viewer for any warnings or errors?
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Regards Per-Torben Sørensen http://pertorben.wordpress.com/

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%SW_DAI-4-DHCP_SNOOPING_DENY after dhcp server migration

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