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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. Displayed is the bulk configuration view 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

ParameterDescription
STATUS INFORMATION
StateThe state of the transit gateway.
DATA RECEIVED
Rate of Data ReceivedThe total amount of data received per second by the transit gateway between the poll interval (in MB/s).
Data ReceivedThe total amount of data received by the transit gateway between the poll interval (in MB).
DATA SENT
Rate of Data SentThe total amount of data sent per second from the transit gateway between the poll interval (in MB/s).
Data SentThe total amount of data sent from the transit gateway between the poll interval (in MB).
PACKETS RECEIVED
Rate of Packets ReceivedThe total number of packets received per second by the transit gateway between the poll interval (in packets/s).
Packets ReceivedThe total number of packets received by the transit gateway between the poll interval.
PACKETS SENT
Rate of Packets SentThe total number of packets sent per second by the transit gateway between the poll interval (in packets/s).
Packets SentThe total number of packets sent by the transit gateway between the poll interval.
BYTES DROPPED
Bytes Dropped - Blackhole RouteThe total number of data dropped because it matched a blackhole route between the poll interval.
Bytes Dropped - No RouteThe total number of data dropped because it did not match any route between the poll interval.
PACKETS DROPPED
Packets Dropped - Blackhole RouteThe total number of packets dropped because they matched a blackhole route between the poll interval.
Packets Dropped - No RouteThe total number of packets dropped because they did not match any route between the poll interval.
PACKETS DROPPED - TTL EXPIRED
Packets Dropped - TTL ExpiredThe total number of packets dropped because the TTL (Time To Live) expired between the poll interval.

Attachments

ParameterDescription
Transit Gateway Attachments
Attachment IDThe unique identifier of the transit gateway attachment.
Attachment NameThe name of the transit gateway attachment, if configured using the Name tag in the AWS portal.
Attachment StateThe current operational state of the transit gateway attachment.
Resource TypeThe type of the resource attached to the transit gateway.
Possible values: vpc | vpn | direct-connect-gateway | peering | connect | tgw-peering
Resource IDThe unique identifier of the resource attached to the transit gateway.
Route Table Association StateThe state of the route table association.
Possible values: Associating | Associated | Disassociating | Disassociated
Route Table IDThe unique identifier of the route table associated with the transit gateway attachment.
Creation TimeThe timestamp shows when the transit gateway attachment was created.

Configuration

ParameterDescription
CONFIGURATION
Transit Gateway IDThe ID of the transit gateway, if configured using the Name tag in the AWS portal.
DescriptionThe description of the transit gateway.
Creation TimeThe creation time of the transit gateway.
Association Route Table IDThe ID of the default association route table.
Propagation Route Table IDThe ID of the default propagation route table.
Amazon ASNA private Autonomous System Number (ASN) for the Amazon side of a BGP session.
ADVANCED SETTINGS
Association Route TableIndicates whether resource attachments are automatically associated with the default association route table.
Propagation Route TableIndicates whether resource attachments automatically propagate routes to the default propagation route table.
Security Group Referencing SupportIndicates whether referencing security groups across VPCs attached to the transit gateway is allowed.
DNS SupportIndicates whether DNS support is enabled.
VPN ECMP SupportIndicates whether Equal Cost Multipath Protocol (ECMP) support is enabled.
Multicast SupportIndicates whether multicast is enabled on the transit gateway.
Auto Accept Shared AttachmentsIndicates whether attachment requests from other AWS accounts are automatically accepted.

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