Got a little bit further:
Select Top 1000000 tblAssets.AssetID As [Asset ID],
tblAssets.AssetName,
tsysAssetTypes.AssetTypename,
tsysAssetTypes.AssetTypeIcon10 As Icon,
tsysIPLocations.IPLocation As [SER Location],
tblSNMPInfo.IfDescription As Port,
tblAssets.IPAddress
From tsysAssetTypes
Inner Join tblAssets On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tblAssetMacAddress On
tblAssets.AssetID = tblAssetMacAddress.AssetID
Inner Join tblSNMPAssetMac On tblAssetMacAddress.Mac =
tblSNMPAssetMac.AssetMacAddress
Inner Join tblSNMPInfo On tblSNMPAssetMac.IfIndex = tblSNMPInfo.IfIndex And
tblSNMPAssetMac.AssetID = tblSNMPInfo.AssetID
Inner Join tblAssets tblAssets_1 On tblSNMPInfo.AssetID = tblAssets_1.AssetID
Inner Join tsysIPLocations On tsysIPLocations.LocationID =
tblAssets.LocationID
Order By tblAssets.AssetName
This shows everything i asked above but not the right IP-adress from the switch it's connected to, i hope someone can help with this last part.