AWS Transit Gateway Monitoring
AWS Transit Gateway - An Overview
Amazon Transit Gateway is a fully managed service that enables customers to connect Virtual Private Clouds (VPCs) and on-premises networks through a central hub. It simplifies complex network topologies by acting as a scalable, high-performance transit layer for routing traffic between networks. Additionally, it supports key features such as bandwidth control, route propagation, and inter-region peering.
Creating a new AWS Transit Gateway monitor
To learn how to create a new AWS Transit Gateway monitor, refer here.
Monitored Parameters
Go to the Monitors Category View by clicking the Monitors tab. Click on Transit Gateway from the 'Child Monitors' under the Cloud Apps table. The bulk configuration view is displayed, distributed into three tabs:
- Availability tab gives the Availability history for the past 24 hours or 30 days.
- Performance tab gives the Health Status and events for the past 24 hours or 30 days.
- List view enables you to perform bulk admin configurations.
Click on the monitor name to see all the Amazon Transit Gateway metrics listed under the following tabs:
Performance Overview
| Parameter | Description |
|---|
| STATUS INFORMATION |
| State | The state of the transit gateway. |
| DATA RECEIVED |
| Rate of Data Received | The total amount of data received per second by the transit gateway between poll intervals (in MB/s). |
| Data Received | The total amount of data received by the transit gateway between the poll intervals (in MB). |
| DATA SENT |
| Rate of Data Sent | The total amount of data sent per second from the transit gateway between poll intervals (in MB/s). |
| Data Sent | The total amount of data sent from the transit gateway between the poll intervals (in MB). |
| PACKETS RECEIVED |
| Rate of Packets Received | The total number of packets received per second by the transit gateway during the poll interval (in packets/s). |
| Packets Received | The total number of packets received by the transit gateway between the poll interval. |
| PACKETS SENT |
| Rate of Packets Sent | The total number of packets sent per second by the transit gateway between the poll interval (in packets/s). |
| Packets Sent | The total number of packets sent by the transit gateway between poll intervals. |
| BYTES DROPPED |
| Bytes Dropped - Blackhole Route | The total number of bytes dropped because they matched a blackhole route between poll intervals. |
| Bytes Dropped - No Route | The total number of data packets dropped because they did not match any route between poll intervals. |
| PACKETS DROPPED |
| Packets Dropped - Blackhole Route | The total number of packets dropped because they matched a blackhole route between poll intervals. |
| Packets Dropped - No Route | The total number of packets dropped because they did not match any route during the poll interval. |
| PACKETS DROPPED - TTL EXPIRED |
| Packets Dropped - TTL Expired | The total number of packets dropped because the TTL (Time To Live) expired between poll intervals. |
Attachments
| Parameter | Description |
|---|
| Transit Gateway Attachments |
| Attachment ID | The unique identifier of the transit gateway attachment. |
| Attachment Name | The name of the transit gateway attachment, if configured using the Name tag in the AWS portal. |
| Attachment State | The current operational state of the transit gateway attachment. |
| Resource Type | The type of the resource attached to the transit gateway.
Possible values: vpc | vpn | direct-connect-gateway | peering | connect | tgw-peering |
| Resource ID | The unique identifier of the resource attached to the transit gateway. |
| Route Table Association State | The state of the route table association.
Possible values: Associating | Associated | Disassociating | Disassociated |
| Route Table ID | The unique identifier of the route table associated with the transit gateway attachment. |
| Creation Time | The timestamp shows when the transit gateway attachment was created. |
Connects
The Connects tab displays monitoring data for Connect-type attachments and their associated Connect peers configured in the transit gateway.
Note: Data collection for Transit Gateway Connects is disabled by default. To enable/disable data collection, navigate to Settings > Performance Polling. In the Optimize Data Collection tab, select Amazon Transit Gateway as the Monitor Type, choose Transit Gateway Connects as the Metric Name, and update the Default Polling Status as required.
| Parameter | Description |
|---|
| Number of Connect Attachments | The total number of Connect attachments associated with the transit gateway. |
| Number of Connect Peers | The total number of Connect peers associated with the transit gateway. |
| CONNECT ATTACHMENTS |
| Connect Attachment ID | The unique identifier of the Transit Gateway Connect attachment. |
| Name | The user-defined name of the Transit Gateway Connect attachment. |
| Transport Attachment ID | The identifier of the underlying Transit Gateway attachment on which the Connect attachment was created. |
| Creation Time | The date and time when the Transit Gateway Connect attachment was created. |
| Connect Peer Count | The total number of Connect peers associated with the Connect attachment. |
| Connect Peer Down Rate | The percentage of Connect peers associated with the attachment that are in a down state (in %). |
| Connect Attachment State | The current lifecycle state of the Transit Gateway Connect attachment. |
| CONNECT ATTACHMENT PEERS |
| Connect Peer ID | The unique identifier of the Transit Gateway Connect peer. |
| Name | The user-defined name of the Transit Gateway Connect peer. |
| Creation Time | The date and time when the Transit Gateway Connect peer was created. |
| TGW GRE Address | The GRE tunnel IP address assigned to the Transit Gateway side of the Connect peer. |
| Peer GRE Address | The GRE tunnel IP address assigned to the peer side of the Connect peer. |
| BGP Session Count | The total number of BGP sessions configured for the Connect peer. |
| BGP Session Down Rate | The percentage of BGP sessions for the Connect peer that are currently in the down state (%). |
| Peer State | The current lifecycle state of the Transit Gateway Connect peer. |
| PERFORMANCE CHARTS |
| Top 5 Connect Peers by BGP Session Count | Displays the top 5 Connect peers by the total number of BGP sessions between the poll intervals. |
| Top 5 Connect Peers by BGP Session Down Rate | Displays the top 5 Connect peers by the percentage of BGP sessions in a down state between the poll intervals. |
Configuration
| Parameter | Description |
|---|
| CONFIGURATION |
| Transit Gateway ID | The ID of the transit gateway, if configured using the Name tag in the AWS portal. |
| Description | The description of the transit gateway. |
| Creation Time | The creation time of the transit gateway. |
| Association Route Table ID | The ID of the default association route table. |
| Propagation Route Table ID | The ID of the default propagation route table. |
| Amazon ASN | A private Autonomous System Number (ASN) for the Amazon side of a BGP session. |
| ADVANCED SETTINGS |
| Association Route Table | Indicates whether resource attachments are automatically associated with the default association route table. |
| Propagation Route Table | Indicates whether resource attachments automatically propagate routes to the default propagation route table. |
| Security Group Referencing Support | Indicates whether referencing security groups across VPCs attached to the transit gateway is allowed. |
| DNS Support | Indicates whether DNS support is enabled. |
| VPN ECMP Support | Indicates whether Equal Cost Multipath Protocol (ECMP) support is enabled. |
| Multicast Support | Indicates whether multicast is enabled on the transit gateway. |
| Auto Accept Shared Attachments | Indicates whether attachment requests from other AWS accounts are automatically accepted. |
