DNS after reducing the advertised EDNS UDP packet size to 512 octets
hello
There is something wrong with my DNS server, it open internet webs so slow,and i have no idea with this .
04-Mar-2011 14:31:57.264 zone 0.0.127.in-addr.arpa/IN/com.apple.ServerAdmin.DNS.public: loaded serial 1997022700
04-Mar-2011 14:31:57.264 zone 15.0.168.192.in-addr.arpa/IN/com.apple.ServerAdmin.DNS.public: loaded serial 2011030204
04-Mar-2011 14:31:57.265 zone ******/IN/com.apple.ServerAdmin.DNS.public: loaded serial 2011030404
04-Mar-2011 14:31:57.265 zone localhost/IN/com.apple.ServerAdmin.DNS.public: loaded serial 42
04-Mar-2011 14:31:57.265 running
04-Mar-2011 14:32:00.066 host unreachable resolving 'b.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:7fd::1#53
04-Mar-2011 14:32:00.261 host unreachable resolving 'r.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:500:2f::f#53
04-Mar-2011 14:32:00.261 host unreachable resolving 'r.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:503:c27::2:30#53
04-Mar-2011 14:32:00.261 host unreachable resolving 'r.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:503:ba3e::2:30#53
04-Mar-2011 14:32:00.261 host unreachable resolving 'r.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:7fd::1#53
04-Mar-2011 14:32:00.261 host unreachable resolving 'r.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:dc3::35#53
04-Mar-2011 14:32:00.361 host unreachable resolving 'dr.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:500:1::803f:235#53
04-Mar-2011 14:32:00.361 host unreachable resolving 'dr.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:7fd::1#53
04-Mar-2011 14:32:00.361 host unreachable resolving 'dr.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:dc3::35#53
04-Mar-2011 14:32:00.361 host unreachable resolving 'dr.dns-sd.udp.0.0.168.192.in-addr.arpa/PTR/IN': 2001:503:ba3e::2:30#53
04-Mar-2011 14:32:00.866 host unreachable resolving './NS/IN': 2001:7fd::1#53
04-Mar-2011 14:32:01.005 success resolving './NS' (in '.'?) after reducing the advertised EDNS UDP packet size to 512 octets
04-Mar-2011 14:32:01.408 success resolving 'local/SOA' (in '.'?) after disabling EDNS
04-Mar-2011 14:32:01.533 host unreachable resolving 't.arin.net/AAAA/IN': 2001:503:ba3e::2:30#53
04-Mar-2011 14:32:01.534 host unreachable resolving 'v.arin.net/AAAA/IN': 2001:500:1::803f:235#53
04-Mar-2011 14:32:01.534 host unreachable resolving 'v.arin.net/AAAA/IN': 2001:7fd::1#53
04-Mar-2011 14:32:01.534 host unreachable resolving 'v.arin.net/AAAA/IN': 2001:503:ba3e::2:30#53
04-Mar-2011 14:32:01.534 host unreachable resolving 'w.arin.net/A/IN': 2001:500:1::803f:235#53
anyone help!! Thanks a lot.
Message was edited by: leo.xue
also interesting, when setting DNS servers IPs in Network Settings for your host,
it is important that the IPs are not doubled.
in example if you have Networksettings like
automatic DHCP given from router or server.
IP-Adress: 192.168.2.2
Subnetmask: 255.255.255.0
Router IP: 192.168.2.1
DNS-Server: 127.0.0.1, 192.168.2.2
wich means localhost and again same machine, just different IP..
then your lookup mechanism has to walk thru this steps to know if there is nothing inside to resolve adresses.
which means in this example it would take double the time if DNS-Server would be just 127.0.0.1
you can see if there is a lot to work thru in your logs.
look for something like "sizing zone task pool based on 9 zones".
this mount of zones will change if you set the correct DNS server IP.
more zones are slower than less, very logical!
but this will not solve your problem with packet size at all, it just reduces circles after dns resolves not known adresses even with packet size change.
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Sam <[email protected]> wrote in message
news:[email protected]..
> Hi,
>
> Does anyone know what is the size of the UDP packets which WLS
> allocates to receive broadcast messages in a clsutered enviroment. I am
> running into issues as we have a limitation on JVM/platform combination,
> where we can have message size of only 32K be allocated for UDP packets
> ?? Is ther eany way to configure WLS to use smaller packet sizes?
>
> TIA,
>
> Sam
>
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regards,
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