diff --git a/Netdisco/Changes b/Netdisco/Changes
index ebf2e84a..441e62f0 100644
--- a/Netdisco/Changes
+++ b/Netdisco/Changes
@@ -6,6 +6,7 @@
   * Add Device addresses with DNS entries report
   * Add Ports with multiple nodes attached report
   * Add Ports administratively disabled report
+  * Add Ports that are blocking report
 
   [ENHANCEMENTS]
 
diff --git a/Netdisco/lib/App/Netdisco/Web/Plugin/Report/PortBlocking.pm b/Netdisco/lib/App/Netdisco/Web/Plugin/Report/PortBlocking.pm
new file mode 100644
index 00000000..c79226e5
--- /dev/null
+++ b/Netdisco/lib/App/Netdisco/Web/Plugin/Report/PortBlocking.pm
@@ -0,0 +1,46 @@
+package App::Netdisco::Web::Plugin::Report::PortBlocking;
+
+use Dancer ':syntax';
+use Dancer::Plugin::DBIC;
+use Dancer::Plugin::Auth::Extensible;
+
+use App::Netdisco::Web::Plugin;
+
+register_report(
+    {   category     => 'Port',
+        tag          => 'portblocking',
+        label        => 'Ports that are blocking',
+        provides_csv => 1,
+    }
+);
+
+get '/ajax/content/report/portblocking' => require_login sub {
+    my @results = schema('netdisco')->resultset('Device')->search(
+        { 'stp' => [ 'blocking', 'broken' ], 'up' => { '!=', 'down' } },
+        {   result_class => 'DBIx::Class::ResultClass::HashRefInflator',
+            select       => [ 'ip', 'dns', 'name' ],
+            join         => ['ports'],
+            '+columns'   => [
+                { 'port'        => 'ports.port' },
+                { 'description' => 'ports.name' },
+                { 'stp'         => 'ports.stp' },
+            ],
+            order_by => { -asc => [qw/me.ip ports.port/] },
+        }
+    )->all;
+
+    return unless scalar @results;
+
+    if ( request->is_ajax ) {
+        template 'ajax/report/portblocking.tt', { results => \@results, },
+            { layout => undef };
+    }
+    else {
+        header( 'Content-Type' => 'text/comma-separated-values' );
+        template 'ajax/report/portblocking_csv.tt',
+            { results => \@results, },
+            { layout  => undef };
+    }
+};
+
+1;
diff --git a/Netdisco/share/config.yml b/Netdisco/share/config.yml
index 69ffedeb..36be210d 100644
--- a/Netdisco/share/config.yml
+++ b/Netdisco/share/config.yml
@@ -34,6 +34,7 @@ path: '/'
 web_plugins:
   - Inventory
   - Report::PortAdminDown
+  - Report::PortBlocking
   - Report::PortMultiNodes
   - Report::PortUtilization
   - Report::ApChannelDist
diff --git a/Netdisco/share/views/ajax/report/portblocking.tt b/Netdisco/share/views/ajax/report/portblocking.tt
new file mode 100644
index 00000000..bd0e53e7
--- /dev/null
+++ b/Netdisco/share/views/ajax/report/portblocking.tt
@@ -0,0 +1,23 @@
+[% USE Number.Format %]
+<table class="table table-bordered table-condensed table-striped nd_floatinghead">
+  <thead>
+    <tr>
+      <th>Device</th>
+      <th class="nd_center-cell">Port</th>
+      <th class="nd_center-cell">Port Description</th>      
+      <th class="nd_center-cell">STP Status</th>
+    </tr>
+  </thead>
+  </tbody>
+    [% FOREACH row IN results %]
+    <tr>
+      <td>[% row.dns || row.name || row.ip | html_entity %]</td>
+      <td class="nd_center-cell"><a href="[% device_ports %]&q=[% row.dns || row.ip | uri %]&f=[% row.port | uri %]&c_nodes=on">
+               [% row.port | html_entity %]</a></td>
+      <td class="nd_center-cell">[% row.description | html_entity %]</td>
+      <td class="nd_center-cell">[% row.stp | html_entity %]</td>
+    </tr>
+    [% END %]
+  </tbody>
+</table>
+
diff --git a/Netdisco/share/views/ajax/report/portblocking_csv.tt b/Netdisco/share/views/ajax/report/portblocking_csv.tt
new file mode 100644
index 00000000..ad3da5b9
--- /dev/null
+++ b/Netdisco/share/views/ajax/report/portblocking_csv.tt
@@ -0,0 +1,12 @@
+[% USE CSV -%]
+[% CSV.dump([ 'Device' 'Port' 'Port Description' 'STP Status' ]) %]
+
+[% FOREACH row IN results %]
+  [% mylist = [] %]
+  [% mylist.push(row.dns || row.name || row.ip) %]
+  [% mylist.push(row.port) %]
+  [% mylist.push(row.description) %]
+  [% mylist.push(row.stp) %]
+  [% CSV.dump(mylist) %]
+
+[% END %]