Packet loss from UK West Azure VM to UK destinations

Question

Packet loss from UK West Azure VM to UK destinations

Anthony Green 6

We're seeing bursts of up to 70% packet loss and increased latency from our Azure VMs in UK West to various destinations in the UK. One example is: 185.163.68.221. We see the same bursts of latency to several other IPs with other ISPs.

Not all destinations are affected for example cloudflare 1.1.1.1 or Google DNS 8.8.8.8 do not show increased latency from the same Azure VM.

Any idea what this may be? Are there known issues in the UK for Azure at the moment? Or are there ways to work around the latency and packet loss?

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Answer 1

Jackson Martins 10,606 MVP Volunteer Moderator

Hi @Anthony Green
At this moment, there are several degraded services in various Azure regions

You can follow through the link below.
https://status.azure.com/pt-br/status

Get in touch if you need more help with this issue.

--please don't forget to "[Accept the answer]" if the reply is helpful--

Jackson Martins 10,606 Reputation points MVP Volunteer Moderator

2022-08-30T19:26:29.653+00:00

Service health
Anthony Green 6 Reputation points

2022-08-30T19:28:34.95+00:00

I don't see anything related to networking or Azure VMs though?
Jackson Martins 10,606 Reputation points MVP Volunteer Moderator

2022-08-30T19:33:25.537+00:00

There are several problems at the moment, and not all of them have been cataloged. I also opened a case with Microsoft about a connection problem I'm facing.

There is no known workaround at this time. You can open a ticket directly with Microsoft support as well.

Suporte ticket = https://portal.azure.com/#blade/Microsoft_Azure_Support/HelpAndSupportBlade/overview

However, there is a general problem =/
Jackson Martins 10,606 Reputation points MVP Volunteer Moderator

2022-08-30T19:48:20.51+00:00

@Anthony Green

You can use azure speed to test latency from UK regions, see if the tool helps you

https://www.azurespeed.com/Azure/Latency
Jackson Martins 10,606 Reputation points MVP Volunteer Moderator

2022-08-31T09:51:40.16+00:00

@Anthony Green

Has the latency issue been resolved? in my case it is already stabilized

--please don't forget to "[Accept the answer]" if the reply is helpful--
Anthony Green 6 Reputation points

2022-08-31T13:01:20.617+00:00

Still seeing some periods of elevated latency and packet loss today.
Pings to several UK destinations with different ISPs showing the same pattern:
Anthony Green 6 Reputation points

2022-08-31T14:12:49.21+00:00

On further investigation, the common feature of destinations that show elevated latency is that they use Cogent (AS217) as their transit to the Microsoft ASN

So ASNs like
IP Wholesale: AS207195
Eve Networks: AS200994

show elevated latency, but those with direct peering with MS do not, like
AAISP: AS20712
Gamma Telecom AS 31655

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Packet loss from UK West Azure VM to UK destinations

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