Hello
On 27.07.2012 15:44, Fabian Wenk wrote:
On 27.07.2012 14:53, Koos van den Hout wrote:
We have a server (ntp.cs.uu.nl) which is included in the .tr zone and rated
at gigabit speed. It's placed in the network in such a way that no stateful
firewall is in the way.
My systems are also connected directly to the internet, so there
is no stateful firewall in the path, which could cause problems.
Normal traffic is around 1000 requests/second. The peak at the leap second
As the requests are UDP, I assume, that requests/second
corresponds to packets/second, which I am metering with MRTG.
My servers have currently around 150 packets/minute, which
calculates to around 2.5 packets/second. So if the bandwidth
rating is linear, then for my 10 Mbit/s I will probably get an
additional 10 packets/second, when included in the tr zone. So
this is in the end around 12.5 packets/second and only 5 times
more then now (I just ignored IPv6 in the calculation, as this
probably wont matter at this time). I guess this should then be
doable, even when I let add all my 6 (3x IPv4 + IPv6) servers to
the tr zone.
In the meantime Ask has added my servers (ntp[1-3].home4u.ch) to
the tr zone. My graphs [1] show a lot of request peaks (starting
after 29th July 2012 22:00 CEST), which I did not had before in
that frequency. With the above calculation I expected to have
around 12.5 requests / second, which should correspond to 750
packets / minute in my graphs (for average), but it is currently
between 2800 and 3600 packets / minute. This will probably still
go up a little bit more, as not a full day is measured. But it
will also go down again, when some more servers are added to the
tr zone.
[1] http://www.home4u.ch/ntp/
So far it does not have any impact with other services running on
this servers and in my network, so I will keep my servers in the
tr zone.
bye
Fabian
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