AP in different vlan not registering

[Hyderabad_Syste]

Hi. We have 820 access points (3805i) , and 2 identifi controllers. Controllers and access points are in single vlan (vlan30).. We recently added 20 more ap's of same model,but this time ap's are in different vlan (vlan31), we configured option 43 also and defined controller ip's in dhcp scopes. Now the issue is 20 ap's are getting ip address , we can see them on dhcp server. But they are not showing up in controller....what could be the issue.... 1st controller IP is 172.22.68.251 , with AP registration enabled. 2nd controller IP is 172.22.68.252 with AP registration enabled.

[Doug]

Reference: How To Configure an AP to Find the IdentiFi Wireless Controller with DHCP Option 78 on a Windows Ser...

[Ronald_Dvorak]

If the above example is working just replace the first field 1 to a 2.
This indicates that 2 IP addresses are included in the information.

Like this...
2
192
168
10
161
192
168
10
162

-Ron

[Mohanakrishnan_]

Option 78.

[Hyderabad_Syste]

Thanks Mohanakrishnan

its working after adding 78 option, how to add 2 controller ip address.....can i add 2 ip addresses. will it be helpful when one of the controller fails....