C9115 - ssh and wlc join problem

[Fernandes]

Hi guys,

I have 30 C9115AXI. 

When I connect them to the network, I see them with cdp, I can ping, but it does not join the controller. I can't even make an SSH connection.

When I connect with the console and write the ip address of the controller, the problem is solved, but since all access points are mounted, it is very difficult to do this to all of them.

Is there any way to solve this problem?

-------------------------
Device ID: AP6C8D.********
Entry address(es):
IP address: 10.100.*.*
IPv6 address: FE80::6E8D:77FF:*****:***** (link-local)
Platform: cisco C9115AXI-E, Capabilities: Router Trans-Bridge
Interface: GigabitEthernet1/0/1, Port ID (outgoing port): GigabitEthernet0
Holdtime : 158 sec

Version :
Cisco AP Software, ap1g7-k9w8 Version: 8.10.130.0
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2014-2015 by Cisco Systems, Inc.

advertisement version: 2
Power drawn: 18.900 Watts
Power request id: 5157, Power management id: 2
Power request levels are:18900 15400 0 0 0
Management address(es):
IP address: 10.100.*.*

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[docjb0221 · Accepted solution]

Does your DHCP scope have option 43 set in hex with the management IP address of the controller?

[Fernandes]

Thank u so much, after adding Option 43 value the issue was resolved

[Rich R]

What model of controller?
What version of software?
Are the APs on the same subnet as the WLC or routed from another subnet?
If routed then as @docjb0221 says you need a method for the APs to discover the WLC.
https://www.cisco.com/c/en/us/support/docs/wireless/5500-series-wireless-controllers/119286-lap-notjoin-wlc-tshoot.html#anc5
DHCP Option 43 is the method most of us use.  You can specify 1 or more WLCs for the AP to attempt to join.
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/97066-dhcp-option-43-00.html#anc9