diff --git a/release/models/isis/openconfig-isis-routing.yang b/release/models/isis/openconfig-isis-routing.yang
index 80a3154ff8..496d5edad8 100644
--- a/release/models/isis/openconfig-isis-routing.yang
+++ b/release/models/isis/openconfig-isis-routing.yang
@@ -20,7 +20,13 @@ submodule openconfig-isis-routing {
   description
     "This module describes YANG model for ISIS Routing";
 
-  oc-ext:openconfig-version "1.7.0";
+  oc-ext:openconfig-version "1.8.0";
+
+  revision "2026-05-23" {
+    description
+      "Add IP reachability suppression per global, level, and interface-level address family with inheritance.";
+    reference "1.8.0";
+  }
 
   revision "2024-02-28" {
     description
@@ -361,6 +367,7 @@ submodule openconfig-isis-routing {
         uses isis-metric-config;
         uses rt-admin-config;
         uses isis-ecmp-config;
+        uses isis-reachability-global-config;
       }
 
       container state {
@@ -372,6 +379,7 @@ submodule openconfig-isis-routing {
         uses isis-metric-config;
         uses rt-admin-config;
         uses isis-ecmp-config;
+        uses isis-reachability-global-config;
       }
 
       uses isis-mt-list;
@@ -412,6 +420,7 @@ submodule openconfig-isis-routing {
         uses isis-afi-safi-config;
         uses isis-metric-config;
         uses rt-admin-config;
+        uses isis-reachability-interface-config;
       }
 
       container state {
@@ -421,6 +430,7 @@ submodule openconfig-isis-routing {
         uses isis-afi-safi-config;
         uses isis-metric-config;
         uses rt-admin-config;
+        uses isis-reachability-interface-config;
       }
 
       uses oc-sr:sr-igp-interface-top;
@@ -533,4 +543,90 @@ submodule openconfig-isis-routing {
       }
     }
   }
+
+  grouping isis-reachability-global-config {
+    description
+      "Grouping defining reachability options for ISIS at the global context.";
+
+    leaf suppress-interface-ip {
+      type oc-isis-types:suppress-interface-ip-mode;
+      default "NONE";
+      description
+        "Controls IP reachability (TLVs 135/235) advertisement for all
+        interfaces enabled for this address-family.";
+    }
+  }
+
+  grouping isis-reachability-level-config {
+    description
+      "Grouping defining reachability options for ISIS at the level context.";
+
+    leaf suppress-interface-ip {
+      type oc-isis-types:suppress-interface-ip-mode;
+      description
+        "Controls IP reachability (TLVs 135/235) advertisement for interfaces
+        enabled in this level.
+        If not specified, the value is inherited from the global level configuration.";
+    }
+  }
+
+  grouping isis-reachability-interface-config {
+    description
+      "Grouping defining reachability options for ISIS at the interface level context.";
+
+    leaf suppress {
+      type boolean;
+      description
+        "Controls IP reachability (TLVs 135/235) advertisement for this interface.
+        When set to true, advertisement of the interface's IP prefix is suppressed.
+        When set to false, advertisement of the interface's IP prefix is not suppressed.
+        If not specified, the behavior is inherited from the level or global configuration.";
+    }
+  }
+
+  grouping isis-level-afi-safi-list {
+    description
+      "This grouping defines address-family configuration and state
+      information per level.";
+
+    list af {
+      key "afi-name safi-name";
+
+      description
+        "Address-family/Subsequent Address-family list per level.";
+
+      leaf afi-name {
+        type leafref {
+          path "../config/afi-name";
+        }
+        description
+          "Reference to address-family type";
+      }
+
+      leaf safi-name {
+        type leafref {
+          path "../config/safi-name";
+        }
+        description
+          "Reference to subsequent address-family type";
+      }
+
+      container config {
+        description
+          "This container defines AFI-SAFI configuration parameters per level.";
+
+        uses isis-afi-safi-config;
+        uses isis-reachability-level-config;
+      }
+
+      container state {
+        config false;
+        description
+          "This container defines AFI-SAFI state information per level.";
+
+        uses isis-afi-safi-config;
+        uses isis-reachability-level-config;
+      }
+    }
+  }
 }
diff --git a/release/models/isis/openconfig-isis-types.yang b/release/models/isis/openconfig-isis-types.yang
index eb33a4ea31..393ced2c6a 100644
--- a/release/models/isis/openconfig-isis-types.yang
+++ b/release/models/isis/openconfig-isis-types.yang
@@ -20,7 +20,13 @@ module openconfig-isis-types {
     "This module contains general data definitions for use in ISIS YANG
     model.";
 
-  oc-ext:openconfig-version "0.6.0";
+  oc-ext:openconfig-version "0.7.0";
+
+  revision "2026-05-23" {
+    description
+      "Add IP reachability suppression mode enumeration.";
+    reference "0.7.0";
+  }
 
   revision "2022-02-11" {
     description
@@ -205,6 +211,29 @@ module openconfig-isis-types {
   }
 
   // typedef statements
+  typedef suppress-interface-ip-mode {
+    type enumeration {
+      enum NONE {
+        description
+          "Do not suppress IP reachability on any interface.";
+      }
+      enum ALL {
+        description
+          "Suppress IP reachability on all interfaces in this level/address-family.";
+      }
+      enum NON_PASSIVE {
+        description
+          "Suppress IP reachability on all non-passive (active) interfaces.";
+      }
+      enum NON_PASSIVE_POINT_TO_POINT {
+        description
+          "Suppress IP reachability on non-passive (active) point-to-point interfaces only.";
+      }
+    }
+    description
+      "Mode for interface IP reachability suppression.";
+  }
+
   typedef level-type {
     type enumeration {
       enum LEVEL_1 {
diff --git a/release/models/isis/openconfig-isis.yang b/release/models/isis/openconfig-isis.yang
index fcad2fb687..3948af92f7 100644
--- a/release/models/isis/openconfig-isis.yang
+++ b/release/models/isis/openconfig-isis.yang
@@ -54,7 +54,13 @@ module openconfig-isis {
             +-> { levels config }
             +-> { level adjacencies }";
 
-  oc-ext:openconfig-version "1.7.0";
+  oc-ext:openconfig-version "1.8.0";
+
+  revision "2026-05-23" {
+    description
+      "Add IP reachability suppression per global, level, and interface-level address family with inheritance.";
+    reference "1.8.0";
+  }
 
   revision "2024-02-28" {
     description
@@ -1665,6 +1671,13 @@ module openconfig-isis {
         "This container defines ISIS authentication.";
       uses isis-level-authentication-group;
     }
+
+    container afi-safi {
+      description
+        "This container defines address-family specific configuration
+        and state information per level.";
+      uses isis-level-afi-safi-list;
+    }
   }
 
   grouping isis-level-authentication-group {