diff --git a/README.md b/README.md
index 3b7653ff..ad3a7b74 100644
--- a/README.md
+++ b/README.md
@@ -200,7 +200,7 @@ Holo supports the following IETF RFCs and Internet drafts:
 | ietf-mpls-ldp@2022-03-14 | 86.96% | 92.31% | 100.00% | 100.00% | [92.38%](http://westphal.com.br/holo/ietf-mpls-ldp.html) |
 | ietf-mpls@2020-12-18 | 0.00% | 57.14% | - | - | [35.29%](http://westphal.com.br/holo/ietf-mpls.html) |
 | ietf-ospf-sr@2023-07-09 | 25.00% | 53.95% | - | - | [52.81%](http://westphal.com.br/holo/ietf-ospf-sr.html) |
-| ietf-ospf@2022-10-19 | 75.00% | 59.36% | 100.00% | 41.94% | [59.33%](http://westphal.com.br/holo/ietf-ospf.html) |
+| ietf-ospf@2022-10-19 | 75.00% | 59.64% | 100.00% | 41.94% | [59.57%](http://westphal.com.br/holo/ietf-ospf.html) |
 | ietf-ospfv3-extended-lsa@2023-08-21 | 50.00% | 85.28% | - | - | [84.85%](http://westphal.com.br/holo/ietf-ospfv3-extended-lsa.html) |
 | ietf-rip@2020-02-20 | 27.91% | 93.33% | 100.00% | - | [55.41%](http://westphal.com.br/holo/ietf-rip.html) |
 | ietf-routing-policy@2021-10-11 | 100.00% | 0.00% | - | - | [98.11%](http://westphal.com.br/holo/ietf-routing-policy.html) |
diff --git a/holo-ospf/src/northbound/yang.rs b/holo-ospf/src/northbound/yang.rs
index 02473eb1..eb228c6d 100644
--- a/holo-ospf/src/northbound/yang.rs
+++ b/holo-ospf/src/northbound/yang.rs
@@ -19,7 +19,6 @@ use crate::packet::tlv::{
     AdjSidFlags, GrReason, PrefixSidFlags, RouterInfoCaps,
 };
 use crate::packet::PacketType;
-use crate::route::PathType;
 use crate::spf::SpfLogType;
 use crate::{ospfv2, ospfv3, spf};
 
@@ -97,17 +96,6 @@ impl ToYang for SpfLogType {
     }
 }
 
-impl ToYang for PathType {
-    fn to_yang(&self) -> String {
-        match self {
-            PathType::IntraArea => "intra-area".to_owned(),
-            PathType::InterArea => "inter-area".to_owned(),
-            PathType::Type1External => "external-1".to_owned(),
-            PathType::Type2External => "external-2".to_owned(),
-        }
-    }
-}
-
 impl ToYang for InterfaceCfgError {
     fn to_yang(&self) -> String {
         match self {
diff --git a/holo-ospf/src/route.rs b/holo-ospf/src/route.rs
index 9a7576e6..fac6c702 100644
--- a/holo-ospf/src/route.rs
+++ b/holo-ospf/src/route.rs
@@ -12,6 +12,7 @@ use bitflags::bitflags;
 use derive_new::new;
 use holo_utils::ip::IpAddrKind;
 use holo_utils::mpls::Label;
+use holo_utils::southbound::OspfRouteType;
 use holo_utils::sr::IgpAlgoType;
 
 use crate::area::Area;
@@ -84,15 +85,6 @@ pub struct SummaryRtr<V: Version> {
     pub metric: u32,
 }
 
-// OSPF path types in decreasing order of preference.
-#[derive(Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
-pub enum PathType {
-    IntraArea,
-    InterArea,
-    Type1External,
-    Type2External,
-}
-
 // Route nexthop key.
 #[derive(Clone, Copy, Debug, Eq, new, Ord, PartialEq, PartialOrd)]
 pub struct NexthopKey<I: IpAddrKind> {
@@ -116,8 +108,9 @@ pub struct Nexthop<I: IpAddrKind> {
     pub sr_label: Option<Label>,
 }
 
-// Ordered list of nexthops.
+// Type aliases.
 pub type Nexthops<I: IpAddrKind> = BTreeMap<NexthopKey<I>, Nexthop<I>>;
+pub type PathType = OspfRouteType;
 
 // ===== impl RouteNet =====
 
diff --git a/holo-ospf/src/southbound/tx.rs b/holo-ospf/src/southbound/tx.rs
index 386b2ed0..f2e4d0dd 100644
--- a/holo-ospf/src/southbound/tx.rs
+++ b/holo-ospf/src/southbound/tx.rs
@@ -11,6 +11,7 @@ use holo_utils::ibus::{IbusMsg, IbusSender};
 use holo_utils::mpls::Label;
 use holo_utils::southbound::{
     LabelInstallMsg, LabelUninstallMsg, Nexthop, RouteKeyMsg, RouteMsg,
+    RouteOpaqueAttrs,
 };
 
 use crate::collections::Arena;
@@ -66,6 +67,9 @@ pub(crate) fn route_install<V>(
         distance: distance.into(),
         metric: route.metric(),
         tag: route.tag,
+        opaque_attrs: RouteOpaqueAttrs::Ospf {
+            route_type: route.path_type,
+        },
         nexthops: nexthops.clone(),
     };
     let msg = IbusMsg::RouteIpAdd(msg);
diff --git a/holo-rip/src/southbound/tx.rs b/holo-rip/src/southbound/tx.rs
index 4a0c1067..b00dc27a 100644
--- a/holo-rip/src/southbound/tx.rs
+++ b/holo-rip/src/southbound/tx.rs
@@ -5,7 +5,9 @@
 //
 
 use holo_utils::ibus::{IbusMsg, IbusSender};
-use holo_utils::southbound::{Nexthop, RouteKeyMsg, RouteMsg};
+use holo_utils::southbound::{
+    Nexthop, RouteKeyMsg, RouteMsg, RouteOpaqueAttrs,
+};
 
 use crate::route::{Route, RouteType};
 use crate::version::Version;
@@ -31,6 +33,7 @@ pub(crate) fn route_install<V>(
         distance: distance.into(),
         metric: route.metric.get() as u32,
         tag: Some(route.tag.into()),
+        opaque_attrs: RouteOpaqueAttrs::None,
         nexthops: [Nexthop::Address {
             ifindex: route.ifindex,
             addr: route.nexthop.unwrap().into(),
diff --git a/holo-routing/src/ibus.rs b/holo-routing/src/ibus.rs
index 540236fa..ee3655f2 100644
--- a/holo-routing/src/ibus.rs
+++ b/holo-routing/src/ibus.rs
@@ -96,6 +96,7 @@ pub(crate) fn notify_redistribute_add(
         distance: route.distance,
         metric: route.metric,
         tag: route.tag,
+        opaque_attrs: route.opaque_attrs.clone(),
         nexthops: route.nexthops.clone(),
     };
     let msg = IbusMsg::RouteRedistributeAdd(msg);
diff --git a/holo-routing/src/northbound/configuration.rs b/holo-routing/src/northbound/configuration.rs
index 74ee4be2..99f271be 100644
--- a/holo-routing/src/northbound/configuration.rs
+++ b/holo-routing/src/northbound/configuration.rs
@@ -22,7 +22,9 @@ use holo_utils::ibus::{IbusMsg, SrCfgEvent};
 use holo_utils::ip::{AddressFamily, IpNetworkKind};
 use holo_utils::mpls::LabelRange;
 use holo_utils::protocol::Protocol;
-use holo_utils::southbound::{Nexthop, NexthopSpecial, RouteKeyMsg, RouteMsg};
+use holo_utils::southbound::{
+    Nexthop, NexthopSpecial, RouteKeyMsg, RouteMsg, RouteOpaqueAttrs,
+};
 use holo_utils::sr::{IgpAlgoType, SidLastHopBehavior, SrCfgPrefixSid};
 use holo_utils::yang::DataNodeRefExt;
 use holo_yang::TryFromYang;
@@ -821,6 +823,7 @@ impl Provider for Master {
                     distance: 1,
                     metric: 0,
                     tag: None,
+                    opaque_attrs: RouteOpaqueAttrs::None,
                     nexthops,
                 };
 
diff --git a/holo-routing/src/northbound/state.rs b/holo-routing/src/northbound/state.rs
index 7a936e13..40ea8edb 100644
--- a/holo-routing/src/northbound/state.rs
+++ b/holo-routing/src/northbound/state.rs
@@ -17,7 +17,8 @@ use holo_northbound::state::{
 };
 use holo_northbound::{CallbackKey, NbDaemonSender};
 use holo_utils::mpls::Label;
-use holo_utils::southbound::Nexthop;
+use holo_utils::protocol::Protocol;
+use holo_utils::southbound::{Nexthop, RouteOpaqueAttrs};
 use holo_yang::ToYang;
 use ipnetwork::{Ipv4Network, Ipv6Network};
 
@@ -348,6 +349,33 @@ fn load_callbacks() -> Callbacks<Master> {
             // TODO: implement me!
             None
         })
+        .path(ribs::rib::routes::route::metric::PATH)
+        .get_element_u32(|_master, args| {
+            let (_, route) = args.list_entry.as_route().unwrap();
+            if matches!(route.protocol, Protocol::OSPFV2 | Protocol::OSPFV3) {
+                Some(route.metric)
+            } else {
+                None
+            }
+        })
+        .path(ribs::rib::routes::route::tag::PATH)
+        .get_element_u32(|_master, args| {
+            let (_, route) = args.list_entry.as_route().unwrap();
+            if matches!(route.protocol, Protocol::OSPFV2 | Protocol::OSPFV3) {
+                route.tag
+            } else {
+                None
+            }
+        })
+        .path(ribs::rib::routes::route::route_type::PATH)
+        .get_element_string(|_master, args| {
+            let (_, route) = args.list_entry.as_route().unwrap();
+            if let RouteOpaqueAttrs::Ospf { route_type } = &route.opaque_attrs {
+                Some(route_type.to_yang())
+            } else {
+                None
+            }
+        })
         .build()
 }
 
diff --git a/holo-routing/src/rib.rs b/holo-routing/src/rib.rs
index 0a6ad154..aeed4136 100644
--- a/holo-routing/src/rib.rs
+++ b/holo-routing/src/rib.rs
@@ -16,7 +16,7 @@ use holo_utils::mpls::Label;
 use holo_utils::protocol::Protocol;
 use holo_utils::southbound::{
     AddressFlags, AddressMsg, LabelInstallMsg, LabelUninstallMsg, Nexthop,
-    NexthopSpecial, RouteKeyMsg, RouteMsg,
+    NexthopSpecial, RouteKeyMsg, RouteMsg, RouteOpaqueAttrs,
 };
 use holo_utils::{UnboundedReceiver, UnboundedSender};
 use ipnetwork::{IpNetwork, Ipv4Network, Ipv6Network};
@@ -41,6 +41,7 @@ pub struct Route {
     pub distance: u32,
     pub metric: u32,
     pub tag: Option<u32>,
+    pub opaque_attrs: RouteOpaqueAttrs,
     pub nexthops: BTreeSet<Nexthop>,
     pub last_updated: DateTime<Utc>,
     pub flags: RouteFlags,
@@ -88,6 +89,7 @@ impl Rib {
                     distance,
                     0,
                     None,
+                    RouteOpaqueAttrs::None,
                     Default::default(),
                     Utc::now(),
                     RouteFlags::empty(),
@@ -139,6 +141,7 @@ impl Rib {
                     msg.distance,
                     msg.metric,
                     msg.tag,
+                    msg.opaque_attrs,
                     msg.nexthops,
                     Utc::now(),
                     RouteFlags::empty(),
@@ -151,6 +154,7 @@ impl Rib {
                 route.distance = msg.distance;
                 route.metric = msg.metric;
                 route.tag = msg.tag;
+                route.opaque_attrs = msg.opaque_attrs;
                 route.nexthops = msg.nexthops;
                 route.last_updated = Utc::now();
                 route.flags.remove(RouteFlags::REMOVED);
@@ -188,6 +192,7 @@ impl Rib {
                     0,
                     0,
                     None,
+                    RouteOpaqueAttrs::None,
                     msg.nexthops.clone(),
                     Utc::now(),
                     RouteFlags::empty(),
diff --git a/holo-utils/src/southbound.rs b/holo-utils/src/southbound.rs
index 6d2ae96b..9d0b3311 100644
--- a/holo-utils/src/southbound.rs
+++ b/holo-utils/src/southbound.rs
@@ -83,6 +83,7 @@ pub struct RouteMsg {
     pub distance: u32,
     pub metric: u32,
     pub tag: Option<u32>,
+    pub opaque_attrs: RouteOpaqueAttrs,
     pub nexthops: BTreeSet<Nexthop>,
 }
 
@@ -112,6 +113,24 @@ pub struct LabelUninstallMsg {
     pub route: Option<(Protocol, IpNetwork)>,
 }
 
+// Route opaque attributes.
+#[derive(Clone, Debug)]
+#[derive(Deserialize, Serialize)]
+pub enum RouteOpaqueAttrs {
+    None,
+    Ospf { route_type: OspfRouteType },
+}
+
+// OSPF route types in decreasing order of preference.
+#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
+#[derive(Deserialize, Serialize)]
+pub enum OspfRouteType {
+    IntraArea,
+    InterArea,
+    Type1External,
+    Type2External,
+}
+
 // ===== impl Nexthop =====
 
 impl Nexthop {
@@ -192,3 +211,16 @@ impl TryFromYang for NexthopSpecial {
         }
     }
 }
+
+// ===== impl OspfRouteType =====
+
+impl ToYang for OspfRouteType {
+    fn to_yang(&self) -> String {
+        match self {
+            OspfRouteType::IntraArea => "intra-area".to_owned(),
+            OspfRouteType::InterArea => "inter-area".to_owned(),
+            OspfRouteType::Type1External => "external-1".to_owned(),
+            OspfRouteType::Type2External => "external-2".to_owned(),
+        }
+    }
+}
diff --git a/holo-yang/modules/deviations/ietf-ospf-holo-deviations.yang b/holo-yang/modules/deviations/ietf-ospf-holo-deviations.yang
index 6260e7c5..a581181e 100644
--- a/holo-yang/modules/deviations/ietf-ospf-holo-deviations.yang
+++ b/holo-yang/modules/deviations/ietf-ospf-holo-deviations.yang
@@ -3271,16 +3271,4 @@ module ietf-ospf-holo-deviations {
     deviate not-supported;
   }
   */
-
-  deviation "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/ospf:metric" {
-    deviate not-supported;
-  }
-
-  deviation "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/ospf:tag" {
-    deviate not-supported;
-  }
-
-  deviation "/rt:routing/rt:ribs/rt:rib/rt:routes/rt:route/ospf:route-type" {
-    deviate not-supported;
-  }
 }