Solution, Failed to retrieve crls, Symptom – H3C Technologies H3C WX3000E Series Wireless Switches User Manual
Page 301: Analysis

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The URL of the registration server for certificate request is not correct or not configured.
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No authority is specified for certificate request.
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Some required parameters of the entity DN are not configured.
Solution
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Make sure that the network connection is physically proper.
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Retrieve a CA certificate.
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Regenerate a key pair.
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Specify a trusted CA.
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Use the ping command to check that the RA server is reachable.
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Specify the authority for certificate request.
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Configure the required entity DN parameters.
Failed to retrieve CRLs
Symptom
Failed to retrieve CRLs.
Analysis
Possible reasons include:
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The network connection is not proper. For example, the network cable might be damaged or loose.
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No CA certificate has been retrieved before you try to retrieve CRLs.
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The IP address of LDAP server is not configured.
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The CRL distribution URL is not configured.
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The LDAP server version is wrong.
Solution
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Make sure that the network connection is physically proper.
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Retrieve a CA certificate.
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Specify the IP address of the LDAP server.
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Specify the CRL distribution URL.
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Re-configure the LDAP version.
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