Cisco sr not accepting aaa new model

A common issue!

The "Cisco SR" you're referring to is likely a Cisco Switch Router (SR) device, such as a Cisco 3850 or 3650 series switch router.

When the AAA (Authentication, Authorization, and Accounting) server is not accepting new model devices, it's usually due to one of the following reasons:

  1. Incompatible AAA protocol: Ensure that the AAA server and the Cisco SR device are using the same AAA protocol. For example, if the AAA server is using RADIUS (Remote Authentication Dial-In User Service), the Cisco SR device should also be configured to use RADIUS.
  2. Incorrect AAA server IP address: Verify that the AAA server IP address is correctly configured on the Cisco SR device. Make sure the IP address is reachable and the AAA server is responding to authentication requests.
  3. AAA server not configured for new model devices: Check if the AAA server is configured to support the new model device. You may need to update the AAA server configuration to include the new device model.
  4. Device authentication method: Ensure that the Cisco SR device is configured to use the correct authentication method. For example, if the device is configured to use 802.1X, ensure that the AAA server is configured to support 802.1X authentication.
  5. AAA server timeout: Check if the AAA server timeout is set too low, causing the device to timeout before the AAA server can respond. You can increase the timeout value on the AAA server or on the Cisco SR device.
  6. Device firmware version: Ensure that the Cisco SR device is running the latest firmware version. Outdated firmware may cause compatibility issues with the AAA server.
  7. AAA server configuration issues: Check the AAA server configuration for any errors or inconsistencies. Verify that the AAA server is properly configured to authenticate devices and that there are no issues with the authentication process.

To troubleshoot the issue, you can try the following steps:

  1. Enable AAA debugging on the Cisco SR device to gather more information about the authentication process.
  2. Verify the AAA server configuration using tools like radiusd or freeradius.
  3. Check the device logs for any errors or warnings related to AAA authentication.
  4. Try authenticating the device using a different AAA server or a different authentication method.

If you're still experiencing issues, please provide more details about your setup, including the Cisco SR device model, AAA server software, and configuration files. I'll be happy to help you troubleshoot the issue!