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Monitoring SMB signed session statistics

You can monitor SMB sessions statistics and determine which established sessions are signed and which are not.

About this task

The statistics command at the advanced privilege level provides the signed_sessions counter that you can use to monitor the number of signed SMB sessions. The signed_sessions counter is available with the following statistics objects:

  • cifs enables you to monitor SMB signing for all SMB sessions.
  • smb1 enables you to monitor SMB signing for SMB 1.0 sessions.
  • smb2 enables you to monitor SMB signing for SMB 2.x and SMB 3.0 sessions.
    Note
    SMB 3.0 statistics are included in the output for the smb2 object.

If you want to compare the number of signed session to the total number of sessions, you can compare output for the signed_sessions counter with the output for the established_sessions counter.

You must start a statistics sample collection before you can view the resultant data. You can view data from the sample if you do not stop data collection. Stopping data collection gives you a fixed sample. Not stopping data collection gives you the ability to get updated data that you can use to compare against previous queries. The comparison can help you identify trends.

For more information about using the statistics command, see the Performance Monitoring Power Guide.

  1. Set the privilege level to advanced: set -privilege advanced
  2. Start a data collection: statistics start -object {cifs|smb1|smb2} -instance instance -sample-id sample_ID [-node node_name]

    If you do not specify the -sample-id parameter, the command generates a sample identifier for you and defines this sample as the default sample for the CLI session. The value for -sample-id is a text string. If you run this command during the same CLI session and do not specify the -sample-id parameter, the command overwrites the previous default sample.

    You can optionally specify the node on which you want to collect statistics. If you do not specify the node, the sample collects statistics for all nodes in the cluster.

  3. Optional: Use the statistics stop command to stop collecting data for the sample.
  4. View SMB signing statistics:
    If you want to view information for...Enter...
    Signed sessions show -sample-id sample_ID -counter signed_sessions|node_name [-node node_name]
    Signed sessions and established sessions show -sample-id sample_ID -counter signed_sessions|established_sessions|node_name [-node node_name]

    If you want to display information for only a single node, specify the optional -node parameter.
  5. Return to the admin privilege level: set -privilege admin

Examples​

The following example shows how you can monitor SMB 2.x and SMB 3.0 signing statistics on storage virtual machine (SVM) vs1.

The following command moves to the advanced privilege level:

cluster1::> set -privilege advanced

Warning: These advanced commands are potentially dangerous; use them 
only when directed to do so by support personnel.
Do you want to continue? {y|n}: y

The following command starts data collection for a new sample:

cluster1::*> statistics start -object smb2 -sample-id smbsigning_sample -vserver vs1
Statistics collection is being started for Sample-id: smbsigning_sample

The following command stops the data collection for the sample:

cluster1::*> statistics stop -sample-id smbsigning_sample
Statistics collection is being stopped for Sample-id: smbsigning_sample

The following command shows signed SMB sessions and established SMB sessions by node from the sample:

cluster1::*> statistics show -sample-id smbsigning_sample 
-counter signed_sessions|established_sessions|node_name

Object: smb2
Instance: vs1
Start-time: 2/6/2013 01:00:00
End-time: 2/6/2013 01:03:04
Cluster: cluster1

    Counter                                              Value
    -------------------------------- -------------------------
    established_sessions                                     0
    node_name                                           node1
    signed_sessions                                          0
    established_sessions                                     1
    node_name                                           node2
    signed_sessions                                          1
    established_sessions                                     0
    node_name                                           node3
    signed_sessions                                          0
    established_sessions                                     0
    node_name                                           node4
    signed_sessions                                          0

The following command shows signed SMB sessions for node2 from the sample:

cluster1::*> statistics show -sample-id smbsigning_sample 
-counter signed_sessions|node_name -node node2

Object: smb2
Instance: vs1
Start-time: 2/6/2013 01:00:00
End-time: 2/6/2013 01:22:43
Cluster: cluster1

    Counter                                              Value
    -------------------------------- -------------------------
    node_name                                            node2
    signed_sessions                                          1

The following command moves back to the admin privilege level:

cluster1::*> set -privilege admin