Hello Jay Mehta,
Thank you for using our services.
If you are going to use sub-domains the first menu is achievable with the built in navigation controls. You just have to specify for the SiteMenu or other navigation control to bind only the first level of items. If you are not going to use sub-domains and each website will be separate entity you will have to create the main navigation by hand.
For site navigation - your top navigation - you can use the SiteMenu and tell it from which node to start from, using the StartingNodeUrl property. This way you can set the node under which the sub-domain is and bind its child nodes.
The same goes for the SitePanelBar. You will have to edit the SitePanelBar.ascx.cs file if you wish to have the StartingNodeUrl property. You can copy the code for this property from the SiteMenu.ascx.cs file.
For more information on creating sub-domains within a Sitefinity website, please take a look at the following KB article
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items.