Rank: Newbie
Groups: Member
Joined: 7/13/2007
Posts: 3
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Hi!
There is a page with listboxes and 4 callbackpanels. The first lisbox has an Onclick event handled by javascript. The javascript calls the server side EO function which refreses the second listbox. Se there is a regular callbackpanel usage.
This page works fine in the most of our users. But at some users the callback doesn't refreshes the listboxes.
The common at these users: They have an ADSL subsription shared by a router. In the router the MTU parameter is set to 1492. With this setting the callback dosen't works. When the MTU is set to 1400 the callback works.
Have you ever met this problem?
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Rank: Administration
Groups: Administration
Joined: 5/27/2007
Posts: 24,194
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Hi,
MTU is a key factor of network connectivity but we do not exactly know why 1492 would not work in your environment. 1492 should be good enough for an ADSL over PPPoE. However under a few circumstance you would need to reduce it further:
1. If you have a VPN. VPN needs additional information in the package. This often causes the uploader to work. But occasionally it can cause other control stops working because the root of the problem is a network connectivity issue;
2. Certain network equipments in between, mostly firewalls, sometimes have smaller MTU values that can cause problem;
3. Certain firewalls restrict HTTP requests with bigger HTML form variable values. This issue is not strictly related to MTU though;
ASP.NET has a setting that can break bigger view state data into small chunks. That something can fix scenario 3, but for scenario 1 and 2, it is still strictly a network configuration issue and we do not believe there anything can be done on the application level.
Thanks
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Rank: Newbie
Groups: Member
Joined: 7/13/2007
Posts: 3
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Thanks
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