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DNS taks over 2 seconds

pacem
Grafter
Posts: 175
Registered: 07-09-2007

DNS taks over 2 seconds

My internal IP is 192.168.1.100, my router IP is ...254 The router just passed DNS queries on to PN's servers 212.159.6.9-10. These are obtained automatically.

Several queries are timing our after 2 seconds, and only the 2nd query is being responded to:
Output from ethereal:

o. Time Source Destination Protocol Info
1 0.000000 192.168.1.100 192.168.1.254 DNS Standard query AAAA www.digitalpoint.com
2 2.019884 192.168.1.100 192.168.1.254 DNS Standard query AAAA www.digitalpoint.com
3 2.410601 192.168.1.254 192.168.1.100 DNS Standard query response CNAME crystalmethod.digitalpoint.com
4 2.411778 192.168.1.100 192.168.1.254 DNS Standard query AAAA crystalmethod.digitalpoint.com
5 4.416017 192.168.1.100 192.168.1.254 DNS Standard query AAAA crystalmethod.digitalpoint.com
6 4.543388 192.168.1.254 192.168.1.100 DNS Standard query response
7 4.574616 192.168.1.100 192.168.1.254 DNS Standard query A crystalmethod.digitalpoint.com
8 6.576287 192.168.1.100 192.168.1.254 DNS Standard query A crystalmethod.digitalpoint.com
9 6.640996 192.168.1.254 192.168.1.100 DNS Standard query response A 216.9.35.56


This poor response means that some web-pages take over a minute to load. This next trace shows request that have to be sent 6 times before a response is received:


No. Time Source Destination Protocol Info
1 0.000000 192.168.1.100 192.168.1.254 DNS Standard query AAAA technet2.microsoft.com
2 0.317867 192.168.1.254 192.168.1.100 DNS Standard query response
3 0.320238 192.168.1.100 192.168.1.254 DNS Standard query A technet2.microsoft.com
4 2.324754 192.168.1.100 192.168.1.254 DNS Standard query A technet2.microsoft.com
5 2.471683 192.168.1.254 192.168.1.100 DNS Standard query response A 207.46.196.114
6 9.276353 192.168.1.100 192.168.1.254 DNS Standard query AAAA js.microsoft.com
7 9.365674 192.168.1.254 192.168.1.100 DNS Standard query response CNAME i.microsoft.com.edgesuite.net CNAME a1475.g.akamai.net
8 9.366797 192.168.1.100 192.168.1.254 DNS Standard query AAAA i.microsoft.com.edgesuite.net
9 9.445778 192.168.1.254 192.168.1.100 DNS Standard query response CNAME a1475.g.akamai.net
10 9.446821 192.168.1.100 192.168.1.254 DNS Standard query AAAA a1475.g.akamai.net
11 11.454714 192.168.1.100 192.168.1.254 DNS Standard query AAAA a1475.g.akamai.net
12 13.461728 192.168.1.100 192.168.1.254 DNS Standard query AAAA a1475.g.akamai.net
13 21.466428 192.168.1.100 192.168.1.254 DNS Standard query AAAA a1475.g.akamai.net
14 29.255645 192.168.1.100 192.168.1.254 DNS Standard query A a1475.g.akamai.net
15 31.263781 192.168.1.100 192.168.1.254 DNS Standard query A a1475.g.akamai.net
16 31.384632 192.168.1.254 192.168.1.100 DNS Standard query response A 84.53.134.207 A 84.53.134.200
17 37.468438 192.168.1.100 192.168.1.254 DNS Standard query AAAA a1475.g.akamai.net
18 37.622978 192.168.1.254 192.168.1.100 DNS Standard query response
19 38.700182 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.com
20 39.290628 192.168.1.100 192.168.1.254 DNS Standard query AAAA m.webtrends.com
21 41.704188 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.com
22 42.177287 192.168.1.254 192.168.1.100 DNS Standard query response CNAME c.microsoft.akadns.net
23 42.184677 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.akadns.net
24 42.296228 192.168.1.100 192.168.1.254 DNS Standard query AAAA m.webtrends.com
25 44.192359 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.akadns.net
26 45.300529 192.168.1.100 192.168.1.254 DNS Standard query AAAA m.webtrends.com
27 45.441609 192.168.1.254 192.168.1.100 DNS Standard query response CNAME microsoft.webtrends.akadns.net
28 45.444851 192.168.1.100 192.168.1.254 DNS Standard query AAAA microsoft.webtrends.akadns.net
29 45.555022 192.168.1.254 192.168.1.100 DNS Standard query response
30 45.556936 192.168.1.100 192.168.1.254 DNS Standard query A microsoft.webtrends.akadns.net
31 47.196919 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.akadns.net
32 47.567415 192.168.1.100 192.168.1.254 DNS Standard query A microsoft.webtrends.akadns.net
33 47.750158 192.168.1.254 192.168.1.100 DNS Standard query response A 63.88.212.184
34 55.201269 192.168.1.100 192.168.1.254 DNS Standard query AAAA c.microsoft.akadns.net
35 58.693284 192.168.1.100 192.168.1.254 DNS Standard query A c.microsoft.akadns.net
36 58.812894 192.168.1.254 192.168.1.100 DNS Standard query response A 207.46.249.253



Please no one suggest OpenDNS.COM; they are breaking internet protocols and storing the address of every site you visit. PN Need to sort their DNS.

Paul.<><
3 REPLIES
Plusnet Staff
Plusnet Staff
Posts: 12,169
Thanks: 18
Fixes: 1
Registered: 04-04-2007

DNS taks over 2 seconds

Hi Paul,

DNS seems OK to me, 6.9 was a tad sluggish on a couple of replies but generally OK. I've asked CSC to try and it seems OK to them at the moment but they are keeping a very close eye on it.

Does it make a difference if you change to 212.159.13.49 and 212.159.13.50 or if you set the DNS in the PC's network settings rather than the router?
Community Veteran
Posts: 26,345
Thanks: 600
Fixes: 8
Registered: 10-04-2007

DNS taks over 2 seconds

I had been noticing that my connection seemed to get more sluggish and that after I rebooted my router it picked up. At some stage I took my routers IP out of the DNS settings on my PC and explicitly entered the 4 PN DNS servers. It seems since then not to have needed the reboot - these facts may not be connected.

This may or may not be a load of tosh - but it's worth a try.
jelv (a.k.a Spoon Whittler)
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N/A

DNS taks over 2 seconds

at risk of veering a little bit off topic, but thought it might be of interest - I use the freeware TreeWalk DNS caching software - it's pretty much idiot-proof to install and it really helps to speed up page loads as fewer addresses need resolving.

(If you use zonealarm or similar, be sure to allow named.exe to access the web when it asks!)

Hope that's useful!