force cisco ap to join controller

lwapp ap controller ip address capwap ap controller ip address In the image below you can see the AP joining the WLC instantly after setting the IP Address manually.

1) Why it resolving DNS domain name after got the IP address from the DHCP ?1-2) AP goes through all discovery method and build a list of candidate WLC. We will mention the purpose of Master Controller and stress on importance of controller priming.

it is under security tabIt seems due to some reason those AP lost its controller & cannot find it again for registration. It looks like my APs are stuck somewhere in between the migration process. Previously known WLC IP, AP will rememberup to 24 previosly learnt WLC IP address & send discovery to them. It discovered, joined and downloaded the updated software from the controller without incident.

We do not use option 43 so naturally I statically assigned the controller for it to to join. Each method will be demonstrated with their order of priority explained. 4. we have opened udp/5246-5247 and udp/12222 and udp/12223 ports bi-directional but still APs are not joiningHi yes I was able to fix it up. I can see the discovery request and respose from these APs to the new controller. I’d love to hear your experience and/or input on the subject. I was able to upgrade the controller from 7.6 to 8.0.121 without any issues. I have 2 have them and had the same issue. So here are the command to do this.Since I have not configured the switch port for vlan 113, still AP cannot reach its gateway.

Part 1 of this video covers the basic of controller discovery with L3 and directed L3 broadcastMetha Cheiwanichakorn, CCIE#23585 (RS, Sec, SP), is a Cisco networking enthusiast with years of experience in the industry. In HREAP mode you can do this & see this complete process without encryption( Refer While the order is not important for real life they ask about it in the CCIE written examHi Nayarasi, my name is Denny. (see below)If you took a wireshark packet capture of the WLC connected switch port you can see the details of each of these types of packet.

You can disable encryption for CAPWAP by using “But once I disable it , AP could not join the WLC & could not verify the complete process without DTLS encryption. It takes a broadcast packet for the specified port/protocol and turns it into unicast to forwarded address. Note that discovery request is sent to WLC management IP with destination port UDP 5246 (capwap-control). This time you can see AP successfully able to complete Discovery & Join process as it can reach WLC. but it showing last logs as Nov 24 14:03:25.343: %CAPWAP-5-SENDJOIN: sending Join Request to it’s not joining to the controller can you help in this?What AP model you got and what software version running on your WLC ?I usually go through your web for wireless help, I found your web very useful. (Cisco Controller) >show ap join stats detailed f4:4e:05:dc:52:d0Hi, We are trying to register 3700 AP to 5520 WLC with 8.1.102 code running and we are seeing LCB allocation failed for the new AP under ap join response section error in AP join status on controller. Should the primary controller go down, the AP tries to register with the secondary controller. Hi Rene, I have an issue with an AP not joining the WLC, I have 3 AP’s on the WLC, one of them keeps drop the connection, when I check it by show cdp nei deta it has the correct IP address and it’s up on the switch, I can bring it back up by bouncing the port but it will come up for less than 3 minutes or so, please check the debug below on the WLC. We will see few other options (DHCP, DNS, Broadcast) discovery in some other post.Here is the discovery response packet. Doing “debug capwap events enable” gives me this line of output…“*spamApTask2: Jul 07 10:21:59.438: [PA] acDtlsPlumbControlPlaneKeys: lrad:10.243.148.32(14482) mwar:172.17.101.105(5246)”For migration, i already have the DNS entry pointing to the new controller and I have configured the new controller IP on the high availability tab of each AP. You can do this as follows via AP CLI.Once rebooted it will complain about no IP. Cheers…I assume your 5520 & 5508 got same image versions. ... it pulled an IP from the pool.

AP first go through a hunt process to find a WLC.

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