After turning off the power and turning it back on, I can't ping IP

[trantriduc1610]

Dear all, I have a problem with C9115AXI-S convert to EWC. This is my running-config, when I disconnect PoE LAN cable and reconnect again, I cannot ping IP in EWC. Everything is fine before disconnect PoE LAN cable ( I can ping, setup WLAN,...)

interface GigabitEthernet0
 mac-address 0000.5e00.0101
 ip dhcp client client-id GigabitEthernet0
 ip dhcp client broadcast-flag clear
 no ip address
 no negotiation auto
!
interface Vlan22
 ip address 172.24.xx.xxx 255.255.255.0
!
ip forward-protocol nd
ip tftp blocksize 8192
ip http server
ip http authentication local
ip http secure-server
ip http secure-trustpoint CISCO_IDEVID_SUDI
ip ssh bulk-mode 131072
ip route 0.0.0.0 0.0.0.0 Vlan22 250
ip dns server

[srimal99]

can you check your route directed to correct default way. ip route pointing to vlan 22 on EWC.

[Rich R]

As you'll see from my answers at this other recent thread https://community.cisco.com/t5/wireless/cannot-ping-ewc-vip-address-capwap-ip-pingable-gui-accessible/m-p/5288872/highlight/true#M283129 I don't believe VLANs are supported on EWC so I'm not surprised you're seeing odd behaviour when using them.
Also the default route is not best practice - you should always specify a next hop IP to your default gateway.
It's also normal to configure ip default-gateway X.X.X.X on EWC.

If you want to use VLAN 22 then just make it the native VLAN on the AP switch port and use Gig0.