diff --git a/src/PSProxmoxVE/Cmdlets/Network/NewPveSdnSubnetCmdlet.cs b/src/PSProxmoxVE/Cmdlets/Network/NewPveSdnSubnetCmdlet.cs
index 0150626..ffd9b0f 100644
--- a/src/PSProxmoxVE/Cmdlets/Network/NewPveSdnSubnetCmdlet.cs
+++ b/src/PSProxmoxVE/Cmdlets/Network/NewPveSdnSubnetCmdlet.cs
@@ -45,6 +45,14 @@ namespace PSProxmoxVE.Cmdlets.Network
 
             var session = GetSession();
             RequireVersion(session, "SDN", 6, 2, 8, 0);
+
+            if (!string.IsNullOrEmpty(DhcpRange)
+                && session.ServerVersion != null && !session.ServerVersion.IsAtLeast(8, 1))
+            {
+                WriteWarning("The -DhcpRange parameter requires PVE 8.1 or later. "
+                    + $"Connected server is PVE {session.ServerVersion}. The parameter will be sent but may be ignored.");
+            }
+
             using var client = new PveHttpClient(session);
 
             WriteVerbose($"Creating SDN subnet '{Subnet}' on VNet '{Vnet}'...");
diff --git a/src/PSProxmoxVE/Cmdlets/Network/SetPveSdnSubnetCmdlet.cs b/src/PSProxmoxVE/Cmdlets/Network/SetPveSdnSubnetCmdlet.cs
index 4c7120d..cf35a8c 100644
--- a/src/PSProxmoxVE/Cmdlets/Network/SetPveSdnSubnetCmdlet.cs
+++ b/src/PSProxmoxVE/Cmdlets/Network/SetPveSdnSubnetCmdlet.cs
@@ -45,6 +45,14 @@ namespace PSProxmoxVE.Cmdlets.Network
 
             var session = GetSession();
             RequireVersion(session, "SDN", 6, 2, 8, 0);
+
+            if (!string.IsNullOrEmpty(DhcpRange)
+                && session.ServerVersion != null && !session.ServerVersion.IsAtLeast(8, 1))
+            {
+                WriteWarning("The -DhcpRange parameter requires PVE 8.1 or later. "
+                    + $"Connected server is PVE {session.ServerVersion}. The parameter will be sent but may be ignored.");
+            }
+
             var service = new NetworkService();
 
             WriteVerbose($"Updating SDN subnet '{Subnet}' on VNet '{Vnet}'...");
diff --git a/src/PSProxmoxVE/Cmdlets/Storage/SendPveFileCmdlet.cs b/src/PSProxmoxVE/Cmdlets/Storage/SendPveFileCmdlet.cs
index 29c9a86..b169ccc 100644
--- a/src/PSProxmoxVE/Cmdlets/Storage/SendPveFileCmdlet.cs
+++ b/src/PSProxmoxVE/Cmdlets/Storage/SendPveFileCmdlet.cs
@@ -66,6 +66,14 @@ namespace PSProxmoxVE.Cmdlets.Storage
                 return;
 
             var session = GetSession();
+
+            if ((!string.IsNullOrEmpty(Checksum) || !string.IsNullOrEmpty(ChecksumAlgorithm))
+                && session.ServerVersion != null && !session.ServerVersion.IsAtLeast(7, 1))
+            {
+                WriteWarning("The -Checksum and -ChecksumAlgorithm parameters require PVE 7.1 or later. "
+                    + $"Connected server is PVE {session.ServerVersion}. The upload will proceed without checksum verification.");
+            }
+
             using var client = new PveHttpClient(session);
 
             WriteVerbose($"Uploading {fileName} to {Node}/{Storage} (content={ContentType})...");