diff --git a/python/sglang/srt/disaggregation/encode_receiver.py b/python/sglang/srt/disaggregation/encode_receiver.py
index fa1ea0d4b83b..3bd3c0d85525 100644
--- a/python/sglang/srt/disaggregation/encode_receiver.py
+++ b/python/sglang/srt/disaggregation/encode_receiver.py
@@ -29,7 +29,11 @@
 from sglang.srt.server_args import ServerArgs
 from sglang.srt.utils import ImageData
 from sglang.srt.utils.hf_transformers_utils import get_processor
-from sglang.srt.utils.network import get_local_ip_auto, get_zmq_socket_on_host
+from sglang.srt.utils.network import (
+    NetworkAddress,
+    get_local_ip_auto,
+    get_zmq_socket_on_host,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -444,10 +448,13 @@ async def send_embedding_port(req_id, receive_count, host_name, embedding_port):
                         part_req_id = create_part_req_id(req_id, part_idx)
                         encoder_url = self.encoder_urls[idx]
                         target_url = f"{encoder_url}/scheduler_receive_url"
+                        receive_url = NetworkAddress(
+                            host_name, embedding_port
+                        ).to_host_port_str()
                         payload = {
                             "req_id": part_req_id,  # use part_req_id to match encode request
                             "receive_count": receive_count,
-                            "receive_url": f"{host_name}:{embedding_port}",
+                            "receive_url": receive_url,
                             "modality": modality.name,
                         }
                         logger.info(
diff --git a/python/sglang/srt/disaggregation/encode_server.py b/python/sglang/srt/disaggregation/encode_server.py
index 4da24e522c98..87f9a731ee9c 100644
--- a/python/sglang/srt/disaggregation/encode_server.py
+++ b/python/sglang/srt/disaggregation/encode_server.py
@@ -1008,10 +1008,10 @@ async def _send(
 
         # Send ack/data
         if url is not None:
-            endpoint = NetworkAddress.parse(url).to_tcp()
+            endpoint = NetworkAddress.parse(url)
         else:
-            endpoint = NetworkAddress(prefill_host, embedding_port).to_tcp()
-        logger.info(f"{endpoint = }")
+            endpoint = NetworkAddress(prefill_host, embedding_port)
+        logger.info(f"{endpoint.to_tcp() = }")
 
         # Serialize data
         if self.server_args.encoder_transfer_backend == "mooncake":
@@ -1031,12 +1031,20 @@ async def _send(
         def send_with_socket():
             sock = self.sync_context.socket(zmq.PUSH)
             config_socket(sock, zmq.PUSH)
+            if endpoint.is_ipv6:
+                sock.setsockopt(zmq.IPV6, 1)
+
             try:
-                sock.connect(endpoint)
+                sock.connect(endpoint.to_tcp())
                 if buffer is not None:
                     sock.send_multipart([serialized_data, buffer], copy=False)
                 else:
                     sock.send_multipart([serialized_data], copy=False)
+            except Exception as e:
+                logger.error(
+                    f"Error occurred while sending data in send_with_socket: {e}"
+                )
+                raise
             finally:
                 sock.close()
 
diff --git a/python/sglang/srt/utils/network.py b/python/sglang/srt/utils/network.py
index c374c9535524..d830559b87d0 100644
--- a/python/sglang/srt/utils/network.py
+++ b/python/sglang/srt/utils/network.py
@@ -204,6 +204,8 @@ def get_zmq_socket_on_host(
         else:
             bind_host = f"tcp://{host}"
     else:
+        # If no host is specified, have to set zmq.IPV6 here(default only binds to IPV4)
+        socket.setsockopt(zmq.IPV6, 1)
         bind_host = "tcp://*"
     port = socket.bind_to_random_port(bind_host)
     return port, socket