Trying to diagnose an issue with IE7 + Vista not honoring DNS "A" record TTL. Ethereal capture on client indicates that the initial DNS resolution returned our established value of 10 minutes, but the client appears to wait a random amount of time to re- resolve. This is not the behavior we have observed with IE6 + XP and 2K. On these systems, the delivered TTL is honored. Is anyone aware of any design differences in the DNS caching of Vista and/or IE7?
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations strongm on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
IE7 + Vista "A" record TTL ignored?
- Thread starter Bremer
- Start date
electronicsfreak
Technical User
You might try this in vista forum if you have not already. Id help but I know very little about vista lol.
Vista forum
forum1583
There is a point in wisdom and knowledge that when you reach it, you exceed what is considered possible - Jason Schoon
Vista forum
forum1583
There is a point in wisdom and knowledge that when you reach it, you exceed what is considered possible - Jason Schoon
have you tried "ipconfig /displaydns" ?
this should show the remaining life time of the server's dns entry in the local cache... running same command several times should show the ttl decrease.
Then see what happens when value becomes 0.
Also, it could depend on the way your web page is working. If it is just static content (no scripts, to reload the page) once the connection is made, their should be no need to re-resolve the server's name...
If links on the page point to the same server it might depend on how they refer to it. i.e relative /otherpage/index.html, as opposed to I suppose the latter might re-resolve where the former will probably not. This could depend on the workings of the browser and could have changed between xp/vista but it is purely hypothetical (as I don't work for MS and have not much experience with Vista)
You might try with Firefow or another browser, to find out if it is a IE issue or DNS cache thing
CU
G.
this should show the remaining life time of the server's dns entry in the local cache... running same command several times should show the ttl decrease.
Then see what happens when value becomes 0.
Also, it could depend on the way your web page is working. If it is just static content (no scripts, to reload the page) once the connection is made, their should be no need to re-resolve the server's name...
If links on the page point to the same server it might depend on how they refer to it. i.e relative /otherpage/index.html, as opposed to I suppose the latter might re-resolve where the former will probably not. This could depend on the workings of the browser and could have changed between xp/vista but it is purely hypothetical (as I don't work for MS and have not much experience with Vista)
You might try with Firefow or another browser, to find out if it is a IE issue or DNS cache thing
CU
G.
- Status
Similar threads
- Locked
- Question
