docs: Add additional explanation on jumpbox and port fowarding setup …

…with minor fix. (#52)

Co-authored-by: Robert Xiong <>

samples/langchain_quick_start.ipynb

@@ -91,15 +91,21 @@
    "source": [
     "Memorystore for Redis uses private, internal IP addresses for security. To access your Redis instance from the public internet, you'll need to set up a jump box and SSH into it from your Colab with port forwarding. Using a local Colab runtime makes this process easier.\n",
     "\n",
-    "Download and run the latest Colab runtime docker image on your local machine: `docker run --network=host us-docker.pkg.dev/colab-images/public/runtime`"
+    "The flow of a connection to Redis instance in this colab example would be:\n",
+    "\n",
+    "```\n",
+    "Colab browser -> Colab runtime on local machine -> GCE VM(jump box) -> Redis instance\n",
+    "```"
    ]
   },
   {
    "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Connect Colab to the local Colab runtime. Please refer to the [instructions](https://research.google.com/colaboratory/local-runtimes.html)."
+    "1. Download and run the latest Colab runtime docker image on your local machine: `docker run --network=host us-docker.pkg.dev/colab-images/public/runtime`\n",
+    "\n",
+    "1. Connect Colab to the local Colab runtime. Please refer to the [instructions](https://research.google.com/colaboratory/local-runtimes.html)."
    ]
   },
   {
@@ -350,7 +356,14 @@
    "outputs": [],
    "source": [
     "redis_ip = !gcloud beta redis instances describe {instance_name} --region {region} --format=\"value(host)\"\n",
-    "!gcloud compute ssh --project={project_id} --zone={zone} {vm_name} -- -NL 6379:{redis_ip}:6379"
+    "!gcloud compute ssh --project={project_id} --zone={zone} {vm_name} -- -NL 6379:{redis_ip[0]}:6379\""
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Please run the above command printed in the output of above step in your local machine to establishing traffic forwarding. Note that the above command is a processed as a blocking command, hence it has to be executed outside Colab and you will need run it on your local machine terminal."
    ]
   },
   {