topic I see your capture there.. I in Wireless

AP Join Error "Timed out while waiting for ECHO repsonse from the AP" Ver 7.4.100

Freemen — Mon, 05 Jul 2021 10:17:25 GMT

I got number of AP showing the error message of " Timed out while waiting for ECHO repsonse from the AP" from WLC version 7.4.100,

I checked the POE switch is no power flappiing, checked the connectivity between AP and WLC seam ok...

My issue is client randomly cannot get DHCP on a WPA2 SSID, what we do is remove the AP and join back.

Please advice any tShoot Step I can perform?

(Cisco Controller) >show ap join stats detailed 7c:ad:74:50:3c:c9

Sync phase statistics
- Time at sync request received............................ Not applicable
- Time at sync completed................................... Not applicable

Discovery phase statistics
- Discovery requests received.............................. 20
- Successful discovery responses sent...................... 20
- Unsuccessful discovery request processing................ 0
- Reason for last unsuccessful discovery attempt........... Not applicable
- Time at last successful discovery attempt................ Apr 13 12:32:48.347
- Time at last unsuccessful discovery attempt.............. Not applicable

Join phase statistics
- Join requests received................................... 9
- Successful join responses sent........................... 9
- Unsuccessful join request processing..................... 0
- Reason for last unsuccessful join attempt................ Not applicable
- Time at last successful join attempt..................... Apr 13 12:32:59.088
- Time at last unsuccessful join attempt................... Not applicable

Configuration phase statistics

--More or (q)uit current module or <ctrl-z> to abort
- Configuration requests received.......................... 27
- Successful configuration responses sent.................. 9
- Unsuccessful configuration request processing............ 0
- Reason for last unsuccessful configuration attempt....... Not applicable
- Time at last successful configuration attempt............ Apr 13 12:32:59.343
- Time at last unsuccessful configuration attempt.......... Not applicable

Last AP message decryption failure details
- Reason for last message decryption failure............... Not applicable

Last AP disconnect details
- Reason for last AP connection failure.................... Timed out while waiting for ECHO repsonse from the AP
- Last AP disconnect reason................................ Unknown failure reason

Last join error summary
- Type of error that occurred last......................... AP got or has been disconnected
- Reason for error that occurred last...................... Timed out while waiting for ECHO repsonse from the AP
- Time at which the last join error occurred............... Mar 22 18:20:21.369

AP disconnect details
- Reason for last AP connection failure.................... Timed out while waiting for ECHO repsonse from the AP

Ethernet Mac : 7c:ad:74:50:3c:c9 Ip Address : 10.0.10.110

--More or (q)uit current module or <ctrl-z> to abort

I see your capture there.. I

George Stefanick — Sun, 24 May 2015 17:30:29 GMT

I see your capture there.. I have to wonder is all your clients having this issue at the same time ?

Have you tried a client debug on a client having issues ?

Check for a duplicate IP

Scott Fella — Sun, 24 May 2015 18:27:20 GMT

Check for a duplicate IP address.

-Scott

HI George,When the client

Freemen — Mon, 25 May 2015 02:52:38 GMT

HI George,

When the client connected to SSID, cannot get DHCP.

is the "Timed out while waiting for ECHO repsonse from the AP" Normal?

as for the debug client, still waiting for issue reoccur

HI Scott, Do you suspect AP

Freemen — Mon, 25 May 2015 02:54:07 GMT

HI Scott, Do you suspect AP IP address duplicated?

Anything is possible. I just

Scott Fella — Mon, 25 May 2015 03:00:40 GMT

Anything is possible. I just want to rule this out.

-Scott

so this doesn't happen all

George Stefanick — Mon, 25 May 2015 11:52:56 GMT

so this doesn't happen all the time just randomly meaning your client issue ?

is randomly, but notice when

Freemen — Tue, 26 May 2015 10:42:37 GMT

is randomly, but notice when the issue happen, AP is still associated to Controller.

FYI no duplicated IP address

Freemen — Tue, 26 May 2015 10:43:28 GMT

FYI no duplicated IP address for AP segment. any info, or debug can help me isolate the issue?

Hi ,Any luck? i also have

Kasun Bandara — Fri, 09 Oct 2015 10:34:50 GMT

Hi ,

Any luck? i also have same issue. From few days, we affected with this problem. WLC 2504 and different kinds of APs.

always one AP disassociate with WLC. worked well before. and no licensing issues.

Disconnecting reason is : Max re transmission reached for AP

connection failure : timed out while waiting for echo response from the ap

any help?

thanks

Re: FYI no duplicated IP address

Mathieu Sturm — Tue, 11 Feb 2025 11:49:57 GMT

Did you ever found the issue?