[outages] ipv6.netflix.com and www.ipv6.cisco.com down

[Frank Bulk]

For those who aren't on outages-discuss, I should close the loop:

ipv6.netflix.com: When I first set up NAGIOS checking I didn't create a
service check but configured the host to perform the check_http check.  I
don't have any notifications for warnings on ipv6 hosts, which is what is
returned when a redirect loop is present.  I discovered the redirection loop
on Saturday, April 23, but I don't know how long it was like that.  At that
time I removed the customized host check (so it does the default ping
instead) and added a check_http service check, where it also returns a
warning but I get notified.  During the outage last week I changed my NAGIOS
check_http to do a "-f follow".  From the NAGIOS records it appears the
issue with ipv6.netflix.com was resolved Friday, April 29 around 3:25 pm
Central because that's when NAGIOS notes a change from a redirect loop to a
failure.  There was a failure on the check_http check because redirection
started working, but to a v4-only site (this has always been the case).  The
NAGIOS check_http service check with "-6 -f follow" properly reports failure
when a v6-site redirects to a v4-only site.  That's why I didn't detect the
recovery on Friday.  I've now set up a custom NAGIOS check_http check to
avoid this issue for ipv6.netflix.com.  

www.ipv6.cisco.com: came up at 4:16 pm Central, just 75 minutes after my
posting.  Perhaps someone from Cisco is lurking on outages.org.

Frank

-----Original Message-----
From: outages-bounces at outages.org [mailto:outages-bounces at outages.org] On
Behalf Of Frank Bulk
Sent: Sunday, May 01, 2011 3:02 PM
To: outages at outages.org
Subject: [outages] ipv6.netflix.com and www.ipv6.cisco.com down

Minor on the grand scale of things, but ipv6.netflix.com has been down since
Tuesday, 6:25 pm (Central) and www.ipv6.cisco.com since Saturday 10:50 am
(Central).

Of the roughly 15 IPv6 websites I monitor, ipv6.cogentco.com has had the
greatest uptime over the last 31 days (100%), followed by ipv6.google.com.

Please direct any comments to outages-discussion.

Frank

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