does the WAYF have an AAAA record too? Sometimes it takes up to 10
mins to load and even then it's missing all the css
wayf.ukfederation.org.uk has AAAA address 2001:630:1:123::fed0:245
I think firefox on windows and safari on os x use ipv6 by default
Alistair
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mov eax,1
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On 25 Jul 2008, at 17:46, Ian Young wrote:
> Ian Young wrote:
>
>> Roberts A.L. wrote:
>>> loop which strangely resulted in
>>> only some of the metadata servers' IPs being unreachable.
>> The various metadata servers are in colos spread around the UK for
>> resilience. So I'm not very surprised that a route to one of them
>> might get lost while the route to another might be untouched.
>
> There's another possible cause of this kind of thing that came to
> light during discussions with another federation member today. I
> thought it might be useful to post a description here in case anyone
> else is debugging a similar solution in the future.
>
> We recently added an IPv6 AAAA record for one of the metadata
> distribution (and WAYF) machines. That shouldn't affect sites with
> working IPv6 connectivity, and it shouldn't affect sites with no
> IPv6 connectivity... but if you have IPv6 that isn't working, this
> might be one of the only things that will break. The symptom in
> this case is that although some (non-IPv6-aware) applications like
> wget can fetch metadata with no problems, IPv6 aware applications
> (lynx, curl, the Shibboleth SP) might see a delay of a few minutes
> while the IPv6 connection times out before the application backs off
> and tries one of the IPv4 addresses...
>
> -- Ian
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