# Diagnostics

## Network Diagnostics

A common issue storage administrators face is the ability to verify connectivity between the storage system
and the servers using the storage. Connectivity might be even harder to verify in a cloud environment,
depending on the network topology.
VPSA Network Diagnostics allows you to check connectivity over the selected network to any server:

1. Go to the **System > Diagnostics**.
2. Select the VPSA network **Interface**.
3. Select the **Diagnostics type**:
   * **Reachability**
     1. Enter the **Target IP Address** of the server in question.
     2. Select whether you want to do one or both of:
        * **Ping** the server, and set the **Count** of echo requests.
        * Run **Traceroute**, and set the number of **TTL** hops.
     3. Click **Run**.

     It takes about a minute until the results display in the output frame.
   * **Packet capture (tcpdump)**

     Click **Run**.

     Packet capture (tcpdump) runs as a background task.
     Runtime is limited to about 2 minutes and the size of the output file
     is limited to 200MB.
     After tcpdump completion you will be able to download the output file.