---
title: "Monitor a peering connection"
description: "Watch a VPC peering connection's inbound and outbound traffic and whether its tunnel is up, over the last hour to the last week, in MyAccount."
content_type: "how-to"
product: "vpc"
platform: "MyAccount"
url: "/myaccount/vpc/how-to/monitor-a-peering-connection/"
topic: ["peering"]
relationships: {"requires":["/myaccount/vpc/how-to/peer-two-vpcs/"]}
---

# Monitor a peering connection

Each VPC keeps graphs of its peering connections: how much traffic comes in and goes out through the
tunnel, and whether the tunnel was up. Use them to confirm that a new connection carries traffic, or
to find when a connection dropped.

## Before you begin

- A VPC with a peering connection. See [Peer two VPCs](/myaccount/vpc/how-to/peer-two-vpcs/).

## Open the graphs

1. Open **Network > VPC**, select the VPC, and open its **Monitoring** tab.
2. Under **Peering Connection**, choose the connection to show.
3. Under **Time Range**, choose how far back to look: **Last Hour**, **Last 6 Hours**, **Last 12
   Hours**, **Last 24 Hours**, or **Last 1 Week**.

## Read the graphs

- **Inbound Traffic** is the traffic that reached this VPC through the tunnel.
- **Outbound Traffic** is the traffic this VPC sent through it.
- **Tunnel Activity** shows whether the tunnel was up: `1` means active, and `0` means it was not.

A healthy connection holds **Tunnel Activity** at `1`, with traffic on the other two graphs whenever
your resources talk to each other. A drop to `0` marks when the tunnel went down. If it is still
down,
[Pause, restart, or delete a peering connection](/myaccount/vpc/how-to/pause-restart-or-delete-a-peering-connection/)
shows how to restart it, and [Troubleshooting VPC](/myaccount/vpc/troubleshooting/vpc/) covers what
else to check.