Please check the outputs...
(WLC) #ping 10.10.0.26
Press 'q' to abort.
Sending 5, 92-byte ICMP Echos to 10.10.0.26, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0.663/0.6998/0.814 ms
(WLC) #show ap database
AP Database
-----------
Name Group AP Type IP Address Status Flags Switch IP Standby IP
---- ----- ------- ---------- ------ ----- --------- ----------
70:3a:0e:c9:66:5a Building-A 225 10.10.0.15 Up 21h:41m:45s 192.168.1.245 0.0.0.0
70:3a:0e:c9:66:96 Family-A 225 10.10.0.12 Up 21h:41m:49s 192.168.1.245 0.0.0.0
70:3a:0e:c9:66:9c Building-A 225 10.10.0.16 Up 21h:41m:44s 192.168.1.245 0.0.0.0
70:3a:0e:c9:66:ea Building-A 225 10.10.0.25 Up 21h:41m:31s 192.168.1.245 0.0.0.0
70:3a:0e:c9:69:2e Building-A 225 10.10.0.8 Up 21h:41m:57s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:30 Family-A 225 10.10.0.7 Up 21h:41m:59s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:32 Family-A 225 10.10.0.21 Up 21h:41m:32s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:38 Family-A 225 10.10.0.17 Up 21h:41m:39s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:7c Family-A 225 10.10.0.1 Up 21h:41m:19s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:8a Family-A 225 10.10.0.20 Up 21h:41m:37s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:8c Family-A 225 10.10.0.9 Up 21h:41m:54s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:96 Family-A 225 10.10.0.13 Up 21h:42m:15s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:a4 Family-A 225 10.10.0.4 Up 21h:40m:56s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:b2 Family-A 225 10.10.0.3 Up 21h:44m:7s 192.168.1.245 0.0.0.0
84:d4:7e:c6:56:c0 Family-A 225 10.10.0.10 Up 21h:41m:51s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:7a Family-A 225 10.10.0.22 Up 21h:41m:28s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:92 Family-A 225 10.10.0.23 Up 21h:41m:28s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:96 Family-A 225 10.10.0.24 Up 21h:41m:23s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:b0 Family-A 225 10.10.0.11 Up 21h:41m:51s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:e2 Building-B 225 10.10.0.5 Up 21h:42m:2s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:f0 Building-B 225 10.10.0.14 Up 21h:41m:47s 192.168.1.245 0.0.0.0
84:d4:7e:c6:63:f6 Building-B 225 10.10.0.2 Up 1h:15m:22s 192.168.1.245 0.0.0.0
84:d4:7e:c6:64:00 Building-B 225 10.10.0.6 Up 21h:42m:1s 192.168.1.245 0.0.0.0
84:d4:7e:c6:64:04 Building-B 225 10.10.0.18 Up 21h:41m:37s 192.168.1.245 0.0.0.0
84:d4:7e:c6:64:10 Family-A 225 10.10.0.19 Up 21h:41m:37s 192.168.1.245 0.0.0.0
Flags: U = Unprovisioned; N = Duplicate name; G = No such group; L = Unlicensed
I = Inactive; D = Dirty or no config; E = Regulatory Domain Mismatch
X = Maintenance Mode; P = PPPoE AP; B = Built-in AP; s = LACP striping
R = Remote AP; R- = Remote AP requires Auth; C = Cellular RAP;
c = CERT-based RAP; 1 = 802.1x authenticated AP; 2 = Using IKE version 2
u = Custom-Cert RAP; S = Standby-mode AP; J = USB cert at AP
M = Mesh node; Y = Mesh Recovery
Total APs:25
(WLC) #show datapath session table 10.10.0.26
Datapath Session Table Entries
------------------------------
Flags: F - fast age, S - src NAT, N - dest NAT
D - deny, R - redirect, Y - no syn
H - high prio, P - set prio, T - set ToS
C - client, M - mirror, V - VOIP
Q - Real-Time Quality analysis
I - Deep inspect, U - Locally destined
E - Media Deep Inspect, G - media signal
A - Application Firewall Inspect
Source IP Destination IP Prot SPort DPort Cntr Prio ToS Age Destination TAge Packets Bytes Flags
--------------- --------------- ---- ----- ----- ----- ---- --- --- ----------- ---- --------- --------- ---------------
Recently, show datapath session table 10.10.0.26 was showing nothing but now it showing some data but still AP is not showing in controller.
(WLC) #show datapath session table 10.10.0.26
Datapath Session Table Entries
------------------------------
Flags: F - fast age, S - src NAT, N - dest NAT
D - deny, R - redirect, Y - no syn
H - high prio, P - set prio, T - set ToS
C - client, M - mirror, V - VOIP
Q - Real-Time Quality analysis
I - Deep inspect, U - Locally destined
E - Media Deep Inspect, G - media signal
A - Application Firewall Inspect
Source IP Destination IP Prot SPort DPort Cntr Prio ToS Age Destination TAge Packets Bytes Flags
--------------- --------------- ---- ----- ----- ----- ---- --- --- ----------- ---- --------- --------- ---------------
10.10.255.245 10.10.0.26 1 11 2048 0/0 0 0 0 local 2 1 120 FCI
10.10.255.245 10.10.0.26 1 12 2048 0/0 0 0 0 local 2 1 120 FCI
10.10.255.245 10.10.0.26 1 13 2048 0/0 0 0 0 local 2 1 120 FCI
10.10.255.245 10.10.0.26 1 14 2048 0/0 0 0 0 local 2 1 120 FCI
10.10.255.245 10.10.0.26 1 15 2048 0/0 0 0 0 local 2 1 120 FCI
10.10.0.26 10.10.255.245 1 11 0 0/0 0 0 0 local 2 1 120 FI
10.10.0.26 10.10.255.245 1 14 0 0/0 0 0 0 local 2 1 120 FI
10.10.0.26 10.10.255.245 1 15 0 0/0 0 0 0 local 2 1 120 FI
10.10.0.26 10.10.255.245 1 12 0 0/0 0 0 0 local 2 1 120 FI
10.10.0.26 10.10.255.245 1 13 0 0/0 0 0 0 local 2 1 120 FI