diff --git a/easytier/src/instance/instance.rs b/easytier/src/instance/instance.rs
index dbb762cc..baa23fed 100644
--- a/easytier/src/instance/instance.rs
+++ b/easytier/src/instance/instance.rs
@@ -271,6 +271,9 @@ impl InstanceConfigPatcher {
         self.patch_connector(patch.connectors).await?;
 
         let global_ctx = weak_upgrade(&self.global_ctx)?;
+        let provider_reconcile_was_running = global_ctx.config.get_ipv6_public_addr_provider()
+            && global_ctx.config.get_ipv6_public_addr_prefix().is_none();
+        let mut provider_config_changed = false;
         if let Some(hostname) = patch.hostname {
             global_ctx.set_hostname(hostname.clone());
             global_ctx.config.set_hostname(Some(hostname));
@@ -285,9 +288,38 @@ impl InstanceConfigPatcher {
             global_ctx.set_ipv6(Some(ipv6.into()));
             global_ctx.config.set_ipv6(Some(ipv6.into()));
         }
+        if let Some(enabled) = patch.ipv6_public_addr_provider {
+            global_ctx.config.set_ipv6_public_addr_provider(enabled);
+            provider_config_changed = true;
+        }
+        if let Some(enabled) = patch.ipv6_public_addr_auto {
+            global_ctx.config.set_ipv6_public_addr_auto(enabled);
+        }
+        if let Some(prefix) = patch.ipv6_public_addr_prefix {
+            let prefix = prefix.trim();
+            let parsed = if prefix.is_empty() {
+                None
+            } else {
+                Some(prefix.parse().with_context(|| {
+                    format!("failed to parse ipv6 public address prefix: {prefix}")
+                })?)
+            };
+            global_ctx.config.set_ipv6_public_addr_prefix(parsed);
+            provider_config_changed = true;
+        }
 
         global_ctx.issue_event(GlobalCtxEvent::ConfigPatched(patch_for_event));
 
+        if provider_config_changed {
+            reconcile_public_ipv6_provider_runtime(&global_ctx).await;
+
+            let provider_reconcile_should_run = global_ctx.config.get_ipv6_public_addr_provider()
+                && global_ctx.config.get_ipv6_public_addr_prefix().is_none();
+            if !provider_reconcile_was_running && provider_reconcile_should_run {
+                run_public_ipv6_provider_reconcile_task(&global_ctx);
+            }
+        }
+
         Ok(())
     }
 
diff --git a/easytier/src/launcher.rs b/easytier/src/launcher.rs
index 290960fb..82d5b02b 100644
--- a/easytier/src/launcher.rs
+++ b/easytier/src/launcher.rs
@@ -881,8 +881,13 @@ impl NetworkConfig {
             result.network_length = Some(ipv4.network_length() as i32);
         }
 
-        result.ipv6_public_addr_provider = Some(config.get_ipv6_public_addr_provider());
-        result.ipv6_public_addr_auto = Some(config.get_ipv6_public_addr_auto());
+        if config.get_ipv6_public_addr_provider() != default_config.get_ipv6_public_addr_provider()
+        {
+            result.ipv6_public_addr_provider = Some(config.get_ipv6_public_addr_provider());
+        }
+        if config.get_ipv6_public_addr_auto() != default_config.get_ipv6_public_addr_auto() {
+            result.ipv6_public_addr_auto = Some(config.get_ipv6_public_addr_auto());
+        }
         result.ipv6_public_addr_prefix = config
             .get_ipv6_public_addr_prefix()
             .map(|prefix| prefix.to_string());
diff --git a/easytier/src/proto/api_config.proto b/easytier/src/proto/api_config.proto
index 568f4855..131b8eb3 100644
--- a/easytier/src/proto/api_config.proto
+++ b/easytier/src/proto/api_config.proto
@@ -24,6 +24,9 @@ message InstanceConfigPatch {
   repeated ExitNodePatch exit_nodes = 8;
   repeated UrlPatch mapped_listeners = 9;
   repeated UrlPatch connectors = 10;
+  optional bool ipv6_public_addr_provider = 11;
+  optional bool ipv6_public_addr_auto = 12;
+  optional string ipv6_public_addr_prefix = 13;
 }
 
 message PortForwardPatch {
diff --git a/easytier/src/tests/three_node.rs b/easytier/src/tests/three_node.rs
index a1f6d7ae..4c2b15f9 100644
--- a/easytier/src/tests/three_node.rs
+++ b/easytier/src/tests/three_node.rs
@@ -3646,6 +3646,46 @@ pub async fn config_patch_test() {
         },
     );
 
+    // 测试1.1：修改公网 IPv6 provider 相关配置
+    let public_prefix = "2001:db8:100::/64";
+    let patch = InstanceConfigPatch {
+        ipv6_public_addr_provider: Some(true),
+        ipv6_public_addr_auto: Some(true),
+        ipv6_public_addr_prefix: Some(public_prefix.to_string()),
+        ..Default::default()
+    };
+    insts[1]
+        .get_config_patcher()
+        .apply_patch(patch)
+        .await
+        .unwrap();
+    assert!(
+        insts[1]
+            .get_global_ctx()
+            .config
+            .get_ipv6_public_addr_provider()
+    );
+    assert!(insts[1].get_global_ctx().config.get_ipv6_public_addr_auto());
+    assert_eq!(
+        insts[1]
+            .get_global_ctx()
+            .config
+            .get_ipv6_public_addr_prefix(),
+        Some(public_prefix.parse().unwrap())
+    );
+    assert!(
+        insts[1]
+            .get_global_ctx()
+            .get_feature_flags()
+            .ipv6_public_addr_provider
+    );
+    assert_eq!(
+        insts[1]
+            .get_global_ctx()
+            .get_advertised_ipv6_public_addr_prefix(),
+        Some(public_prefix.parse().unwrap())
+    );
+
     // 测试2: 端口转发
     let patch = InstanceConfigPatch {
         port_forwards: vec![PortForwardPatch {