diff --git a/opendut-lea/opendut-lea-components/src/health.rs b/opendut-lea/opendut-lea-components/src/health.rs
index e239fb68e..b12f93914 100644
--- a/opendut-lea/opendut-lea-components/src/health.rs
+++ b/opendut-lea/opendut-lea-components/src/health.rs
@@ -1,5 +1,5 @@
 use leptos::prelude::*;
-use crate::tooltip::Tooltip;
+use crate::tooltip::{Tooltip, TooltipDirection};
 
 pub struct State {
     pub kind: StateKind,
@@ -15,9 +15,12 @@ pub enum StateKind {
 }
 
 #[component]
-pub fn Health(state: Signal<State>) -> impl IntoView {
+pub fn Health(
+    state: Signal<State>,
+    #[prop(optional)] tooltip_direction: TooltipDirection,
+) -> impl IntoView {
 
-    let classes = move || state.with(|state| {
+    let health_class = move || state.with(|state| {
         match state.kind {
             StateKind::Unknown => "health-light",
             StateKind::Red => "health-light red",
@@ -26,14 +29,21 @@ pub fn Health(state: Signal<State>) -> impl IntoView {
         }
     });
 
-    let tool_tip_text = Signal::derive(move || state.with(|state| {
+    let tooltip_text = Signal::derive(move || state.with(|state| {
         Clone::clone(&state.text)
     }));
+    
+    let tooltip_content = Box::new(move || {
+        view! {
+            <p> { tooltip_text } </p>
+
+        }.into_any()
+    });
 
     view! {
         <div class="is-flex is-justify-content-center">
-            <Tooltip text=tool_tip_text>
-                <div class=classes />
+            <Tooltip text=tooltip_content direction=tooltip_direction>
+                <div class=health_class />
             </Tooltip>
         </div>
     }
diff --git a/opendut-lea/opendut-lea-components/src/tooltip.rs b/opendut-lea/opendut-lea-components/src/tooltip.rs
index ac589b05f..6e7121b97 100644
--- a/opendut-lea/opendut-lea-components/src/tooltip.rs
+++ b/opendut-lea/opendut-lea-components/src/tooltip.rs
@@ -1,6 +1,8 @@
 use leptos::prelude::*;
 
+#[derive(Default, Clone, Copy)]
 pub enum TooltipDirection {
+    #[default]
     Left,
     Right,
     Up,
@@ -18,10 +20,12 @@ impl TooltipDirection {
     }
 }
 
+pub type TooltipContent = Box<dyn FnOnce() -> AnyView + Send>;
+
 #[component]
 pub fn Tooltip(
-    #[prop(into)] text: Signal<String>,
-    #[prop(into, default=Signal::from(TooltipDirection::Left))] direction: Signal<TooltipDirection>,
+    text: TooltipContent,
+    #[prop(into, optional)] direction: Signal<TooltipDirection>,
     #[prop(into, default=Signal::from(false))] is_hidden: Signal<bool>,
     children: Children
 ) -> impl IntoView {
@@ -34,7 +38,7 @@ pub fn Tooltip(
             <div class="tooltip-container" class=("is-hidden", move || is_hidden.get())>
                 <div class="tooltip-content p-0">
                     <div class="tooltip-item p-3">
-                        { text }
+                        { text() }
                     </div>
                 </div>
             </div>
diff --git a/opendut-lea/src/clusters/components/cluster_health.rs b/opendut-lea/src/clusters/components/cluster_health.rs
index 371606ec4..25324a552 100644
--- a/opendut-lea/src/clusters/components/cluster_health.rs
+++ b/opendut-lea/src/clusters/components/cluster_health.rs
@@ -1,10 +1,12 @@
 use leptos::prelude::*;
 use opendut_lea_components::health::{self, Health};
+use opendut_lea_components::tooltip::TooltipDirection;
 use opendut_model::cluster::state::ClusterState;
 
 #[component]
 pub fn ClusterHealth(
-    #[prop(into)] state: Signal<ClusterState>
+    #[prop(into)] state: Signal<ClusterState>,
+    #[prop(optional)] tooltip_direction: TooltipDirection
 ) -> impl IntoView {
     let _ = state;
 
@@ -17,6 +19,9 @@ pub fn ClusterHealth(
     });
 
     view! {
-        <Health state=health_state />
+        <Health
+            state=health_state
+            tooltip_direction
+        />
     }
 }
diff --git a/opendut-lea/src/clusters/components/delete_cluster_button.rs b/opendut-lea/src/clusters/components/delete_cluster_button.rs
index 87f4bda48..4cfa3828e 100644
--- a/opendut-lea/src/clusters/components/delete_cluster_button.rs
+++ b/opendut-lea/src/clusters/components/delete_cluster_button.rs
@@ -69,9 +69,15 @@ where F: Fn() + Clone + Send + 'static {
         !matches!(button_state.get(), ButtonState::Disabled)
     });
 
+    let tooltip_content = Box::new(move || {
+        view! {
+            Cluster can not be deleted while it is deployed.
+        }.into_any()
+    });
+
     view! {
         <Tooltip
-            text="Cluster can not be deleted while it is deployed."
+            text=tooltip_content
             direction=TooltipDirection::Right
             is_hidden=hide_tooltip
         >
diff --git a/opendut-lea/src/clusters/components/deploy_toggle.rs b/opendut-lea/src/clusters/components/deploy_toggle.rs
index dff92871d..fb85e1a35 100644
--- a/opendut-lea/src/clusters/components/deploy_toggle.rs
+++ b/opendut-lea/src/clusters/components/deploy_toggle.rs
@@ -3,11 +3,12 @@ use std::sync::Arc;
 use leptos::prelude::*;
 use tracing::{debug, error};
 use opendut_carl_api::carl::ClientError;
-use opendut_carl_api::carl::cluster::StoreClusterDeploymentError;
-use opendut_lea_components::tooltip::Tooltip;
+use opendut_carl_api::carl::cluster::{ListClusterPeerStatesResponse, StoreClusterDeploymentError};
+use opendut_lea_components::tooltip::{Tooltip, TooltipDirection};
 use opendut_lea_components::{Toggle, ToggleState};
 use opendut_model::cluster::{ClusterDeployment, ClusterId};
-
+use opendut_model::peer::PeerId;
+use opendut_model::peer::state::PeerMemberState;
 use crate::app::use_app_globals;
 use crate::clusters::IsDeployed;
 use crate::components::{Toast, use_toaster};
@@ -15,8 +16,10 @@ use crate::components::{Toast, use_toaster};
 #[component]
 pub fn DeployToggle<OnDeploymentChanged>(
     #[prop(into)] cluster_id: Signal<ClusterId>,
+    #[prop(into, default=Signal::from(false))] is_new_cluster: Signal<bool>,
     #[prop(into)] is_deployed: Signal<IsDeployed>,
     on_deployment_changed: OnDeploymentChanged,
+    #[prop(optional)] tooltip_direction: TooltipDirection,
 ) -> impl IntoView
 where
     OnDeploymentChanged: Fn() + Clone + Send + 'static,
@@ -101,23 +104,152 @@ where
         }
     };
 
-    let tooltip_text = Signal::derive(move || {
-        if is_deployed.get().0 {
-            "Deployment requested".to_string()
+    let blocked_cluster_deployment = {
+        let carl = globals.client.clone();
+        let cluster_id = cluster_id.get_untracked();
+
+        LocalResource::new(move || {
+            let mut carl = carl.clone();
+            let is_new_cluster = is_new_cluster.get();
+            let _ = is_deployed.get();
+
+            async move {
+                if is_new_cluster {
+                    return None;
+                }
+
+                let states = carl.cluster.list_cluster_peer_states(cluster_id).await
+                    .expect("Failed to request the list of cluster's peer state.");
+                match states {
+                    ListClusterPeerStatesResponse::Success { peer_states } => {
+                        let invalid_peers = peer_states.iter()
+                            .filter(|(_, peer_state)| {
+                                matches!(&peer_state.member, PeerMemberState::Blocked { .. })
+                            })
+                            .map(|(peer_id, _)| peer_id.to_owned())
+                            .collect::<Vec<_>>();
+
+                        if invalid_peers.is_empty() {
+                            None
+                        } else {
+                            Some(BlockedDeployment::Peers(invalid_peers))
+                        }
+                    }
+                    ListClusterPeerStatesResponse::Failure { message } => {
+                        Some(BlockedDeployment::Message(message))
+                    }
+                }
+            }
+        })
+    };
+
+    move || {
+        let on_deploy = on_deploy.clone();
+        let on_undeploy = on_undeploy.clone();
+
+        Suspend::new(async move {
+            let blocked_deployment = blocked_cluster_deployment.await;
+
+            let is_deployed = Signal::derive(move || is_deployed.get().0);
+
+            let show_error = Signal::derive({
+                let blocked_deployment = blocked_deployment.clone();
+                move || blocked_deployment.is_some() && !is_deployed.get()
+            });
+
+            let toggle_state = Signal::derive(move || {
+                if show_error.get() || is_new_cluster.get() {
+                    ToggleState::Disabled
+                } else {
+                    ToggleState::Enabled
+                }
+            });
+
+            let tooltip_content = Box::new(move || {
+                view! {
+                    <DeploymentTooltipContent is_new_cluster is_deployed blocked_deployment />
+                }.into_any()
+            });
+
+            view! {
+                <Tooltip text=tooltip_content direction=tooltip_direction>
+                    <Toggle
+                        is_active=is_deployed
+                        state=toggle_state
+                        on_action=move || {
+                            if is_deployed.get() { on_undeploy() } else { on_deploy() }
+                        }
+                    />
+                </Tooltip>
+            }
+        })
+    }
+}
+
+#[derive(Clone)]
+enum BlockedDeployment {
+    Peers(Vec<PeerId>),
+    Message(String),
+}
+
+#[component]
+fn DeploymentTooltipContent(
+    is_new_cluster: Signal<bool>,
+    is_deployed: Signal<bool>,
+    blocked_deployment: Option<BlockedDeployment>,
+) -> impl IntoView {
+
+    move || {
+        if is_new_cluster.get() {
+            return view! {
+                "Save the cluster first."
+            }.into_any();
+        }
+
+        if !is_deployed.get()
+            && let Some(blocked_deployment) = blocked_deployment.as_ref() {
+                return match blocked_deployment {
+                    BlockedDeployment::Peers(peers) => {
+                        let amount = peers.len();
+
+                        let message = if amount == 1 {
+                            "1 Peer is already in use:".to_string()
+                        } else {
+                            format!("{amount} Peers are already in use:")
+                        };
+
+                        let peer_links = peers
+                            .iter()
+                            .enumerate()
+                            .map(|(index, peer_id)| {
+                                let href = format!("/peers/{peer_id}/configure/general");
+
+                                view! {
+                                    <span>
+                                        {if index == 0 { "" } else { ", " }}
+                                        <a href=href>{peer_id.to_string()}</a>
+                                    </span>
+                                }
+                            })
+                            .collect_view();
+
+                        view! {
+                            <span>{message} " " {peer_links}</span>
+                        }
+                            .into_any()
+                    }
+
+                    BlockedDeployment::Message(message) => {
+                        view! { { message.to_owned() } }.into_any()
+                    }
+                };
+            }
+
+
+        if is_deployed.get() {
+            view! { "Deployment requested" }.into_any()
         } else {
-            "Undeployed".to_string()
+            view! { "Undeployed" }.into_any()
         }
-    });
-
-    view! {
-        <Tooltip text=tooltip_text>
-            <Toggle
-                is_active=Signal::derive(move || is_deployed.get().0)
-                state=ToggleState::Enabled
-                on_action=move || {
-                    if is_deployed.get().0 { on_undeploy() } else { on_deploy() }
-                }
-            />
-        </Tooltip>
     }
 }
diff --git a/opendut-lea/src/clusters/configurator/components/controls.rs b/opendut-lea/src/clusters/configurator/components/controls.rs
index 1ef03b955..b4a0bd9db 100644
--- a/opendut-lea/src/clusters/configurator/components/controls.rs
+++ b/opendut-lea/src/clusters/configurator/components/controls.rs
@@ -37,20 +37,22 @@ where
             navigate_to(WellKnownRoutes::ClustersOverview, use_navigate.clone());
         }
     };
+    
+    let tooltip_direction = TooltipDirection::Right;
 
     view! {
         <div class="is-flex is-align-items-center">
-            <div class=("is-hidden", move || is_new_cluster.get())>
+            <div class="is-flex is-align-items-center">
                 <DeployToggle
                     cluster_id
+                    is_new_cluster
                     is_deployed=deployed_signal
                     on_deployment_changed
+                    tooltip_direction
                 />
             </div>
-            <div class=("is-hidden", move || is_new_cluster.get())>
-                <div class="px-2" />
-            </div>
-            <ClusterHealth state=cluster_state />
+            <div class="px-2" />
+            <ClusterHealth state=cluster_state tooltip_direction />
             <div class="px-2" />
             <SaveClusterButton
                 cluster_descriptor
@@ -145,9 +147,15 @@ fn SaveClusterButton(
         !deployed_signal.get().0
     });
 
+    let tooltip_content = Box::new(move || {
+        view! {
+            Cluster can not be updated while it is deployed.
+        }.into_any()
+    });
+
     view! {
         <Tooltip
-            text="Cluster can not be updated while it is deployed."
+            text=tooltip_content
             direction=TooltipDirection::Right
             is_hidden=hide_tooltip
         >
diff --git a/opendut-lea/src/peers/components/delete_peer_button.rs b/opendut-lea/src/peers/components/delete_peer_button.rs
index fde7e3b09..9c1a2111c 100644
--- a/opendut-lea/src/peers/components/delete_peer_button.rs
+++ b/opendut-lea/src/peers/components/delete_peer_button.rs
@@ -69,9 +69,15 @@ where F: Fn() + Clone + Send + 'static {
         !matches!(button_state.get(), ButtonState::Disabled)
     });
 
+    let tooltip_content = Box::new(move || {
+        view! {
+            Peer can not be deleted while it is configured in a cluster.
+        }.into_any()
+    });
+
     view! {
         <Tooltip
-            text="Peer can not be deleted while it is configured in a cluster."
+            text=tooltip_content
             direction=TooltipDirection::Right
             is_hidden=hide_tooltip
         >
diff --git a/opendut-lea/src/peers/configurator/tabs/devices/device_panel.rs b/opendut-lea/src/peers/configurator/tabs/devices/device_panel.rs
index f08a5bc3d..dce03fea4 100644
--- a/opendut-lea/src/peers/configurator/tabs/devices/device_panel.rs
+++ b/opendut-lea/src/peers/configurator/tabs/devices/device_panel.rs
@@ -34,7 +34,6 @@ where
                     <ReadOnlyInput label="ID" value=device_id_string />
                     <DeviceNameInput device_configuration />
                     <DeviceInterfaceInput user_peer_descriptor device_configuration />
-                    <DeviceInterfaceInput user_peer_descriptor device_configuration />
                     <DeviceTagInput device_configuration />
                     <DeviceDescriptionInput device_configuration />
                 </div>
diff --git a/opendut-lea/src/viper_tests/components/duplicate_viper_test_button.rs b/opendut-lea/src/viper_tests/components/duplicate_viper_test_button.rs
index 66bebaea4..b56aa1334 100644
--- a/opendut-lea/src/viper_tests/components/duplicate_viper_test_button.rs
+++ b/opendut-lea/src/viper_tests/components/duplicate_viper_test_button.rs
@@ -63,8 +63,14 @@ pub fn DuplicateViperTestButton(
         })
     };
 
+    let tooltip_content = Box::new(move || {
+        view! {
+            Duplicate Test Run.
+        }.into_any()
+    });
+
     view! {
-        <Tooltip text="Duplicate Test Run" direction=TooltipDirection::Right>
+        <Tooltip text=tooltip_content direction=TooltipDirection::Right>
             <IconButton
                 icon=FontAwesomeIcon::Duplicate
                 color=ButtonColor::White