Which devices can use cef feature (switches/routers/both/both but not all series?)?

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Cef is not series based. According to Cisco cef is by default enabled on devices which are running IOS version 12.0 or higher then that.

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1/1 ErrorException in Filesystem.php line 111: file_put_contents(/var/www/html/storage/framework/sessions/8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx): failed to open stream: No space left on device

  1. in Filesystem.php line 111
  2. at HandleExceptions->handleError(2, 'file_put_contents(/var/www/html/storage/framework/sessions/8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx): failed to open stream: No space left on device', '/var/www/html/vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php', 111, array('path' => '/var/www/html/storage/framework/sessions/8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx', 'contents' => 'a:4:{s:6:"_token";s:40:"WdKU0rF9xLK3LcvzTgxNHMRLwHFPvPqpHavA1op9";s:11:"viewed_urls";a:1:{i:0;s:76:"which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:9:"_previous";a:1:{s:3:"url";s:104:"http://www.networkbulls.com/which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', 'lock' => true))
  3. at file_put_contents('/var/www/html/storage/framework/sessions/8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx', 'a:4:{s:6:"_token";s:40:"WdKU0rF9xLK3LcvzTgxNHMRLwHFPvPqpHavA1op9";s:11:"viewed_urls";a:1:{i:0;s:76:"which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:9:"_previous";a:1:{s:3:"url";s:104:"http://www.networkbulls.com/which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', 2) in Filesystem.php line 111
  4. at Filesystem->put('/var/www/html/storage/framework/sessions/8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx', 'a:4:{s:6:"_token";s:40:"WdKU0rF9xLK3LcvzTgxNHMRLwHFPvPqpHavA1op9";s:11:"viewed_urls";a:1:{i:0;s:76:"which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:9:"_previous";a:1:{s:3:"url";s:104:"http://www.networkbulls.com/which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}', true) in FileSessionHandler.php line 83
  5. at FileSessionHandler->write('8reC153nZ3c0zWx6PfGuTpKY1vgY0CJAJg0u7BYx', 'a:4:{s:6:"_token";s:40:"WdKU0rF9xLK3LcvzTgxNHMRLwHFPvPqpHavA1op9";s:11:"viewed_urls";a:1:{i:0;s:76:"which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:9:"_previous";a:1:{s:3:"url";s:104:"http://www.networkbulls.com/which-devices-can-use-cef-feature-switchesroutersbothboth-but-not-all-series";}s:6:"_flash";a:2:{s:3:"old";a:0:{}s:3:"new";a:0:{}}}') in Store.php line 128
  6. at Store->save() in StartSession.php line 88
  7. at StartSession->terminate(object(Request), object(Response)) in Kernel.php line 216
  8. at Kernel->terminateMiddleware(object(Request), object(Response)) in Kernel.php line 187
  9. at Kernel->terminate(object(Request), object(Response)) in index.php line 58
  10. at require_once('/var/www/html/public/index.php') in index.php line 20