Brent Cook

August 27, 2010
LTE Diaries: GTP Tunneling: The last time I posted to the blog we were talking about questions surrounding IPv6 deployment. You might remember from that post that I am a software architect at BreakingPoint Systems, specializing in design and performance for the network processors in our products. Today I get to continue our "LTE Diaries" series where we have outlined our plans for LTE support and the speed at which we are able to make this happen thanks to the network processor-based architecture. If you haven't read the previous posts I would encourage you to read up on our overall LTE development, the S1AP implementation and our SCTP support. Today we will tackle the GPRS Tunneling Protocol, or GTP. GTP is a layer-4 protocol used for a number of different back-haul tasks in a 3GPP/LTE environment. It comes in two flavors, GTP-C (control plane) and GTP-U (for user data). I have had the opportunity to implement parts of both GTP-C and GTP-U for BreakingPoint's upcoming LTE support, and would like to share some development notes.
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March 1, 2010
Testing and Validation of Network Security Devices: While catching up on security news and blogs the other day, I came across a blog post from ICSA Labs entitled "Why a Test Lab Needs to be Wary of Commercial Exploit Packet Captures" and thought that it would be a good conversation starter to inform our readers about how BreakingPoint approaches developing test cases for security device testing, our methodology behind why we develop our test cases the way we do, and the thought processes and conclusions behind those decisions.
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