[Winpcap-users] Problem with WinPcap capture with Jumbo frames

[Gianluca Varenni]

WinPcap does not have a limitation on the maximum packet size. It actually interrogates the underlying miniport driver controlling the network card to know what is the maximum frame size.
Are the jumbo frames transmitted/received by the same PC where WinPcap is capturing? If not, it's entirely possible that your network card either doesn't support jumbo frames (quite strange) or simply by default it doesn't use jumbo frames. What network card are you using?

Have a nice day
GV


From: Bhageriya, Piyush 
Sent: Tuesday, March 23, 2010 11:31 PM
To: Winpcap-users at winpcap.org 
Subject: [Winpcap-users] Problem with WinPcap capture with Jumbo frames


Hi WinPcap users,

I've used winpcap library in my application to capture TCP/IP packets and extract DICOM info from those packets.

 

It looks like the Winpcap is only able to capture "normal" size ethernet frames(1600 bytes) and not jumbo or super jumbo frames(e.g. 16kb). 

Maybe the default setting of WinPCap is to capture only normal size frames?

 

Can we configure ethernet frame size in WinPCap?

We are missing DICOM data in case of Jumbo frames in Fast gigabit Ethernet.

 

Kind regards,

 

Piyush Bhageriya

Philips Healthcare

HI - PII - IOCC

Philips Innovation Campus

Philips Electronics India Ltd

Manayata Tech Park,Nagwara, 

Bangalore - 560045, INDIA

Ph: +91 80 41891056

Fax: +91 80 41891000

E-mail: piyush.bhageriya at philips.com

Intranet: pww.bangalore.philips.com

Internet: www.bangalore.philips.com

 



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