Amazon EU-West 1 trouble

Dovid Bender dovid at
Sun Apr 23 10:57:56 UTC 2017

HE is having issues in Europe. I spoke with them an hour ago, they said they were aware of the issue but didn't have an ETA. Based on the traces we saw issues with connections coming into London.

  Original Message  
From: baldur.norddahl at
Sent: April 23, 2017 6:52 AM
To: nanog at
Subject: Amazon EU-West 1 trouble


We are currently experiencing massive packet loss from Amazon EU-West 1. 
This page will show most of 
eu-west-1 as down but actually it is packet loss of 90+ %.

I have found that if I shutdown our link to Hurricane Electric the 
problem disappears. Also it is only an IPv4 problem as IPv6 is fine 
(also going through Hurricane Electric).

A traceroute shows everything ok until the first hop inside the Amazon 
network. The peering is apparently at AMS-IX.

Right now we are ok because I am keeping the HE.Net connection down, but 
I managed to find another NLNOG Ring node that has the same problem:

gigabit at casablanca01:~$ ping
PING ( 56(84) bytes of data.
64 bytes from icmp_seq=2 ttl=244 time=35.1 ms
64 bytes from icmp_seq=34 ttl=244 time=35.2 ms
64 bytes from icmp_seq=44 ttl=244 time=35.2 ms
64 bytes from icmp_seq=52 ttl=244 time=35.2 ms
--- ping statistics ---
72 packets transmitted, 4 received, 94% packet loss, time 71228ms
rtt min/avg/max/mdev = 35.170/35.220/35.251/0.232 ms

That IP is one from eu-west-1 taken from the ec2-reachability page. When 
I ping it with the HE.Net link down there is 0% packet loss. With it up 
we are seeing something like the above. However I notice that Casablanca 
is going out through Telia not HE. The return path could very well be 
via HE of course, there is no way to know that.

From all the RING nodes I checked only Casablanca01 seems to experience 
the problem, so it appears it is not very wide spread.

Anyone know how to get in contact with Amazon and have them debug this 



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