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User receives the %DOT11-4-NO_SSID: Interface Dot11Radio0, no SSIDs configured, radio not started error message






User receives the %DOT11-4-NO_SSID: Interface Dot11Radio0, no SSIDs configured, radio not started error message


Core Issue

The error message indicates that  either no SSID is configured at all  or  no SSID is currnetly active on a dot11Radio interface.



The error message indicates that all Service Set Identifiers (SSIDs) are deleted from the configuration.

SSIDs can be configured either in Interface mode or global mode.

Global SSID configuration is just a template and this is used wireless switch architecture where we can have 100's of interfaces and we don't have to configure whole SSID configurations under all the interfaces we need to enable.

If you have configured the SSID in the global mode make sure that SSIDs are applied to specific Radio Interface in the Interface configuration mode  inorder to bring the Radio up.


Default SSID Configuration



Default Setting



Guest Mode SSID

tsunami (The access point broadcasts this SSID in its beacon and allows client devices with no SSID to associate.)



Creating an SSID


Beginning in privileged EXEC mode, follow these steps to create an SSID:







Step 1

configure terminal

Enter global configuration mode.

Step 2

interface dot11radio { 0 | 1 }

Enter interface configuration mode for the radio interface. The 2.4-GHz radio is radio 0, and the 5-GHz radio is radio 1.

Step 3

ssid ssid-string

Create an SSID and enter SSID configuration mode for the new SSID. The SSID can consist of up to 32 alphanumeric characters. SSIDs are case sensitive.

Step 4

authentication client
username username
password password

(Optional) Set an authentication username and password that the access point uses to authenticate to the network when in repeater mode. Set the username and password on the SSID that the repeater access point uses to associate to a root access point, or with another repeater.

Step 5

accounting list-name

(Optional) Enable RADIUS accounting for this SSID. For list-name, specify the accounting method list. Click this link for more information on method lists: /en/US/docs/ios/12_2/security/configuration/guide/scfacct.html#xtocid2

Step 6

vlan vlan-id

(Optional) Assign the SSID to a VLAN on your network. Client devices that associate using the SSID are grouped into this VLAN. You can assign only one SSID to a VLAN.

Step 7


(Optional) Designate the SSID as your access point's guest-mode SSID. The access point includes the SSID in its beacon and allows associations from client devices that do not specify an SSID.

Step 8

infrastructure-ssid [optional]

(Optional) Designate the SSID as the SSID that other access points and workgroup bridges use to associate to this access point. If you do not designate an SSID as the infrastructure SSID, infrastructure devices can associate to the access point using any SSID. If you designate an SSID as the infrastructure SSID, infrastructure devices must associate to the access point using that SSID unless you also enter the optional keyword.

Step 9


Return to privileged EXEC mode.

Step 10

copy running-config startup-config

(Optional) Save your entries in the configuration file.




Problem Type

Error message


IOS Errors, Warnings, Statistics and Log Messages

DOT11-4-NO_SSID: No SSIDs configured radio not started




Default SSID Configuration

Error messages on a Dot11Radio refer 802.11 Subsystem Message

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