Can you pull up the database and look for the table "Nodes".In that table look for the NetScaler mentioned in the question.Run the following query and display the results.(Replace X.X.X.X with ip address of the Netsclaer device)
Select objectsubtype,Sysname,caption,ip_address,sysobjectid,description from nodes where ip_address='X.X.X.X'
Only if we have snmp data for this device we can display the chart.So as a first step this query results can guide us to isolate the problem.
Good to see that snmp was used to discover this Node.Look for the "InterfaceTraffic_Detail" table,for this node and their corresponding interfaces.There is a column named "In_Averagebps".Do you see data in there,please check the same for the appropriate date you had on the screen shot?
I would recommend to open a support ticket and reference this thread link.Please post back the ticket# and the solution for the benefit of this community.
