[Bug 2139398] Re: Slow connectivity to Ubuntu ports mirrors from AWS ap-southeast-2

[Alex Chaus]

** Description changed:

  Very slow throughput and occasional timeouts are observed when
- provisioning new Ubuntu 24.04 ARM servers in AWS (ap-southeast-2
+ provisioning new Ubuntu 24.04 T4g ARM servers in AWS (ap-southeast-2
  region). The issue appears to affect connectivity to the following
  mirrors:
  
  - ap-southeast-2b.clouds.ports.ubuntu.com
  - ap-southeast-2a.clouds.ports.ubuntu.com
  - ports.ubuntu.com
  
+ Additional findings:
+ 
+ - The issue is reproducible across multiple new and existing T4g ARM instances on Ubuntu 24.04 and Ubuntu 22.04 images
+ - On x86 instances in the same region, Ubuntu repositories resolve to ap-southeast-2.ec2.archive.ubuntu.com, and download performance is normal
+ 
  Environment:
  
  - Platform: AWS EC2
  - Region: ap-southeast-2 (Sydney)
- - Instance type: t4g.small (ARM / aarch64)
- - OS image: Ubuntu 24.04 default cloud image
+ - Instance type: T4g (ARM / aarch64)
+ - OS image: Ubuntu 24.04 / 20.04 default cloud image
  
  Observed behaviour:
  
  - Very low download throughput during apt update / package installation
  - Provisioning delays / timeouts
  - High latency and intermittent packet loss during ping tests
  
  Workaround:
  
  Switching to the AARNet mirror (mirror.aarnet.edu.au) significantly
  improves throughput and provisioning completes normally
  
  Additional notes:
  
  - This behaviour appears consistent across multiple newly provisioned
  and existing instances

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https://bugs.launchpad.net/bugs/2139398

Title:
  Slow connectivity to Ubuntu ports mirrors from AWS ap-southeast-2

Status in apt package in Ubuntu:
  New

Bug description:
  Very slow throughput and occasional timeouts are observed when
  provisioning new Ubuntu 24.04 T4g ARM servers in AWS (ap-southeast-2
  region). The issue appears to affect connectivity to the following
  mirrors:

  - ap-southeast-2b.clouds.ports.ubuntu.com
  - ap-southeast-2a.clouds.ports.ubuntu.com
  - ports.ubuntu.com

  Additional findings:

  - The issue is reproducible across multiple new and existing T4g ARM instances on Ubuntu 24.04 and Ubuntu 22.04 images
  - On x86 instances in the same region, Ubuntu repositories resolve to ap-southeast-2.ec2.archive.ubuntu.com, and download performance is normal

  Environment:

  - Platform: AWS EC2
  - Region: ap-southeast-2 (Sydney)
  - Instance type: T4g (ARM / aarch64)
  - OS image: Ubuntu 24.04 / 20.04 default cloud image

  Observed behaviour:

  - Very low download throughput during apt update / package installation
  - Provisioning delays / timeouts
  - High latency and intermittent packet loss during ping tests

  Workaround:

  Switching to the AARNet mirror (mirror.aarnet.edu.au) significantly
  improves throughput and provisioning completes normally

  Additional notes:

  - This behaviour appears consistent across multiple newly provisioned
  and existing instances

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