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    <title>topic Re: AP1852E Not joined WLC5520 in Wireless</title>
    <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194219#M275593</link>
    <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;- It is not something else,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
    <pubDate>Fri, 13 Sep 2024 10:23:39 GMT</pubDate>
    <dc:creator>Mark Elsen</dc:creator>
    <dc:date>2024-09-13T10:23:39Z</dc:date>
    <item>
      <title>AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193191#M275460</link>
      <description>&lt;P&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;Xin chào tất cả,&amp;nbsp; &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;Nhật ký AP1852E&amp;nbsp; &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:00.0222] CAPWAP trạng thái: DTLS Teardown &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.7807] Không còn quản lý AP Không phải vậy. . &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.7807] Trình quản lý hợp lệ AP không thể tìm thấy cho bộ điều khiển 'SWS-test' (ip: 192.168.10.1) 2024 &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;11:16: 04.7807 ] Không thể tham số kiểm tra SWS-test. &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.7807] Can't tham gia điều khiển. &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.8807] &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.8807] Trạng thái CAPWAP: Khám phá &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.8907] Yêu cầu khám phá gửi đến 192.168.10.1, loại khám phá STATIC_CONFIG(1) &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/2024 11:16:04.8907] ham phá STATIC_CONFIG(1) &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;[*09/11/ 2024 11:16:04.8907] Yêu cầu khám phá được gửi đến 255.255.255.255, khám phá loại UNKNOWN(0) Nhật &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;ký WLC5520&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/P&gt;
&lt;P&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;*spamApTask7: 11/09 12:17:35.089: %CAPWAP-3-DTLS_DB_ERR: capwap_ac_sm.c:9079 34:f8:e7:16:03:00: Không thể tạo kết nối DTLS cho AP 192.168.10.9 (52 64 ) . &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;*spamapTask7: 11/9 12:17:35.089: %DTLS-3-PKI_ERROR: openssl_dtls.c:483 Lỗi khởi tạo PKI: Khởi tạo chỉ thất bại &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;*spmApTask7: 11/9 7:35.089: %LOG - 3-Q_IND : sshpmcert.c:885 Truth nhập chứng chỉ chỉ trước khi &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;khởi động so &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;*spamapTask6: 11/9 12:17:33.086: %CAPWAP-3-DTLS_DB_ERR: capwap_ac_sm.c:9079 d4:6d:50:f3:8f:c7 : Không thể tạo DTLS kết nối cho AP 192.168.10.10 (14590 ). &lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;BR /&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;&lt;FONT style="vertical-align: inherit;"&gt;*spamApTask6: 11/09 12:17:33.086: %DTLS-3-PKI_ERROR: openssl_dtls.c:483 Lỗi khởi tạo PKI: Khởi tạo chứng chỉ không thành công&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/FONT&gt;&lt;/P&gt;</description>
      <pubDate>Wed, 11 Sep 2024 13:29:45 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193191#M275460</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-11T13:29:45Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193248#M275461</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;- Look at this solution&amp;nbsp;&lt;A href="https://community.cisco.com/t5/wireless/ap-s-wont-connect-to-5508-wlc-after-update-to-8-3-143-pki/m-p/3690389#M111597" target="_blank"&gt;https://community.cisco.com/t5/wireless/ap-s-wont-connect-to-5508-wlc-after-update-to-8-3-143-pki/m-p/3690389#M111597&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;and use the last supported release for the 5520 being 8.10.196.0&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Wed, 11 Sep 2024 13:33:40 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193248#M275461</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-11T13:33:40Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193484#M275474</link>
      <description>&lt;P&gt;Thank,&amp;nbsp;I cannot upgrade my WLC5520 to other versions because of errors, I have tried versions such as 8.10, 8.5 and 8.3, the current version I am using is 8.2.166. When upgrading, the error "“result_string: Failure while validating the signature" will appear.&lt;/P&gt;
&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="duyle2_0-1726110096034.png" style="width: 400px;"&gt;&lt;img src="https://community.cisco.com/t5/image/serverpage/image-id/228979iDF61F0F39CD3764E/image-size/medium?v=v2&amp;amp;px=400" role="button" title="duyle2_0-1726110096034.png" alt="duyle2_0-1726110096034.png" /&gt;&lt;/span&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 03:01:48 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193484#M275474</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T03:01:48Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193554#M275479</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - Upgrade CIMC too according to version(s) being pointed out in :&lt;BR /&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp;&lt;A href="https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn810mr11.html#cimc-upgrade" target="_blank"&gt;https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn810mr11.html#cimc-upgrade&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 06:30:44 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193554#M275479</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T06:30:44Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193613#M275487</link>
      <description>&lt;P&gt;My CIMC is on version C220M4.4.0.2h.0.0301211703, which version should I upgrade to?&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 08:20:17 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193613#M275487</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T08:20:17Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193629#M275488</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - That&lt;STRONG&gt; CIMC version&lt;/STRONG&gt; is probably&lt;FONT color="#008000"&gt; OK&lt;/FONT&gt; , also note from&amp;nbsp;&lt;A href="https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn810mr11.html" target="_blank" rel="noopener"&gt;https://www.cisco.com/c/en/us/td/docs/wireless/controller/release/notes/crn810mr11.html&lt;/A&gt;&lt;BR /&gt;&amp;nbsp; &amp;nbsp; when looking at &lt;STRONG&gt;Table 2&lt;/STRONG&gt; you can not&lt;FONT color="#FF6600"&gt;&lt;EM&gt; go directly from 8.2&amp;nbsp; to 8.1&lt;/EM&gt;&lt;EM&gt;0&lt;/EM&gt;&lt;/FONT&gt;&amp;nbsp; , you must go to&lt;FONT color="#008000"&gt;&lt;STRONG&gt; 8.5.x first&lt;/STRONG&gt;&lt;/FONT&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 09:02:16 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193629#M275488</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T09:02:16Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193631#M275489</link>
      <description>&lt;P&gt;Yes, I can't upgrade to 8.3 and 8.5 from version 8.2, it has an error like the picture I sent "“result_string: Failure while validating the signature"&lt;BR /&gt;- 8.2 to 8.3 has the same problem and the same problem from 8.2 to 8.5&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 09:05:23 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193631#M275489</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T09:05:23Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193636#M275490</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - Could you execute from the CLI :&lt;STRONG&gt; show certificate all&lt;/STRONG&gt;&lt;BR /&gt;&amp;nbsp; &amp;nbsp; If you&lt;FONT color="#FF6600"&gt;&lt;EM&gt; get no results&lt;/EM&gt;&lt;/FONT&gt; then execute this procedure&amp;nbsp;&lt;A href="https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/4931-blogs-wireless-mobility/50/1/8540_5520_cert_recover_0.pdf" target="_blank"&gt;https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/4931-blogs-wireless-mobility/50/1/8540_5520_cert_recover_0.pdf&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; M.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 09:15:04 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193636#M275490</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T09:15:04Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193656#M275494</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;I did it but the result is still the same&lt;/P&gt;
&lt;P&gt;(Cisco Controller) &amp;gt;show certificate all&lt;/P&gt;
&lt;P&gt;--------------- Verification Certificates ---------------&lt;/P&gt;
&lt;P&gt;-------------- Identification Certificates --------------&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="duyle2_1-1726134124080.jpeg" style="width: 400px;"&gt;&lt;img src="https://community.cisco.com/t5/image/serverpage/image-id/229004i5E13A6B252EA62B7/image-size/medium?v=v2&amp;amp;px=400" role="button" title="duyle2_1-1726134124080.jpeg" alt="duyle2_1-1726134124080.jpeg" /&gt;&lt;/span&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 09:42:11 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193656#M275494</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T09:42:11Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193662#M275496</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - Hm , &lt;STRONG&gt;that is probably&lt;U&gt; mandatory&lt;/U&gt;&lt;/STRONG&gt; (this is probably the)&amp;nbsp;&lt;BR /&gt;reason that &lt;EM&gt;&lt;FONT color="#FF6600"&gt;the APs could not join too&lt;/FONT&gt;&lt;/EM&gt;) ; you can try it again to verify correctness , otherwise I can't help&lt;BR /&gt;&amp;nbsp;much further and you must contact&lt;U&gt;&lt;STRONG&gt; TAC&lt;/STRONG&gt; &lt;/U&gt;,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp;- You could also consider making&amp;nbsp; a backup of the controller's configuration and erasing the config.&lt;BR /&gt;&amp;nbsp; &amp;nbsp;&lt;EM&gt; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp;Then try this and upgrades again on a maiden device&amp;nbsp; (e.g.)&lt;/EM&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 09:55:17 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193662#M275496</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T09:55:17Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193680#M275498</link>
      <description>&lt;P&gt;Can you check for me using ultraview or anydesk? I'm preparing the device, so I don't have to worry about the data&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 10:26:13 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193680#M275498</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T10:26:13Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193684#M275499</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - As far as I try to help as much as possible , I am not available for that support level ,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp;Kind Regards ,&lt;BR /&gt;&amp;nbsp; &amp;nbsp;Mark.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 10:37:19 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193684#M275499</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T10:37:19Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193687#M275500</link>
      <description>&lt;P&gt;yes, thank you very much, so my device is having certificate problems, I need to contact TAC for support, right?&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 10:48:07 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193687#M275500</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-12T10:48:07Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193704#M275501</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;Yes , you can also explain everything that has been done so far ,&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Thu, 12 Sep 2024 11:19:44 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5193704#M275501</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-12T11:19:44Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194074#M275573</link>
      <description>&lt;P&gt;yes, thank you very much.&lt;BR /&gt;With the error of not having a certificate, the only way to handle it is by opening TAC, right?&lt;BR /&gt;Because I bought this device from another party, I don't know how to open the TAC for support&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 02:33:15 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194074#M275573</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-13T02:33:15Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194109#M275575</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp; &amp;nbsp;- FYI :&amp;nbsp;&lt;A href="https://www.cisco.com/c/en/us/support/docs/instructions-guides/220312-open-a-tac-support-case-for-fast-dedica.html" target="_blank"&gt;https://www.cisco.com/c/en/us/support/docs/instructions-guides/220312-open-a-tac-support-case-for-fast-dedica.html&lt;/A&gt;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 06:00:16 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194109#M275575</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-13T06:00:16Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194126#M275576</link>
      <description>&lt;P&gt;Console into the AP and reboot the AP.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;Post the entire bootup process.&amp;nbsp;&lt;/P&gt;
&lt;P&gt;NOTE:&amp;nbsp; DO NOT post screenshots.&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 07:02:50 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194126#M275576</guid>
      <dc:creator>Leo Laohoo</dc:creator>
      <dc:date>2024-09-13T07:02:50Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194144#M275577</link>
      <description>&lt;P&gt;I send you the .txt file&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 07:45:16 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194144#M275577</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-13T07:45:16Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194152#M275578</link>
      <description>&lt;P&gt;Currently I see on my WLC5520 the following errors:&lt;BR /&gt;- failed to upgrade firmware error"“result_string: Failure while validating the signature”&lt;/P&gt;
&lt;P&gt;- no certificates when show certificate all&lt;/P&gt;
&lt;P&gt;- See AP in Statistics =&amp;gt; AP Join but error message "Not joined"&lt;BR /&gt;Which error prevents the AP from joining the Controller?&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 07:56:17 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194152#M275578</guid>
      <dc:creator>duyle2</dc:creator>
      <dc:date>2024-09-13T07:56:17Z</dc:date>
    </item>
    <item>
      <title>Re: AP1852E Not joined WLC5520</title>
      <link>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194158#M275581</link>
      <description>&lt;P&gt;&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp; - The whole sequence and the certificate problem on the 5520 has already been discussed ; I don't understand why you act now as if nothing has been done,&amp;nbsp;&lt;/P&gt;
&lt;P&gt;&amp;nbsp;M.&lt;/P&gt;</description>
      <pubDate>Fri, 13 Sep 2024 08:29:52 GMT</pubDate>
      <guid>https://community.cisco.com/t5/wireless/ap1852e-not-joined-wlc5520/m-p/5194158#M275581</guid>
      <dc:creator>Mark Elsen</dc:creator>
      <dc:date>2024-09-13T08:29:52Z</dc:date>
    </item>
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