customers on flexconnect AP cannot get dhcp address after upgrade wlc

Hi community support.

I have a WLC 2504, with 30 APs 1130 flexconnect mode. The WLC runs the code version 7.0.240.0. In order to register new models of ap, we need upgrade to a recent code.

In the last attempt to upgrade to version 7.4.121.0, the AP has joined the WLC, mappings of vlan in flexconnect have been checked and were very good. However, customers were unable to get an address DHCP (169.254.x.x). The DHCP server is local to each location, is usually a 3750 x that serves as a master switch.

connection via cable, clients received address dhcp. so the dhcp server isn't the problem. Updated for the 7.6.100.0 code, but got the same behavior.

Finally, we decided to downgrade the wlc code 7.0.240.0 once again, and everything started working again, but I need upgrade we buy access to new models of points.

Someone else had a similar problem?

Thank you

Hello

What is the vlan native you are using? If it's the number of vlan 2, then it is known bug CSCui73764

Symptom:

Flex series APs 1130 & 1240 mode, won't see traffic, for example, DHCP, ARP. on some wireless LANs.

Conditions:
(1) flex connect local switching
(2) AP 1240 or 1130
(3) any version before 7.4.121.7
(4) native vlan x, not work y vlan.
(5) failed to get the ip address of the user.

Workaround solution:
change the vlan native to a surprisingly high number, so no wlan will never be are mapped to a very high bridge group number.

Other Description of the problem:
Telnet on the flex AP. here is an example. VLAN 3 is the vlan native Flex ap, it is correctly mapped to group 1. now WiFi is not working is the one that is mapped to vlan2. below, carefully, the vlan 2 is mapped to fill the 3 group. It is the forum where we hit the bug. Therefore, it can be any combination of wlan-vlan-native vlan.

HTH

Rasika

Pls note all useful responses *.

Tags: Cisco Wireless

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