How to Get Correct Interface MTU when CISCO Client is installed?

Hi,

I installed CISCO VPN client and Modify MTU size for interafaces
using CISCO utility and restart the system.
I write an application that reads MTU using GetIfEntry. But GetIfEntry
returns 1500 only it does not return custom modified MTU value.
If I see packet capture in ethereal then TCP SYN shows me correct
custom MTU Size in MSS.

Please help me what should I do?

Regards,
Anand Choubey
.

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