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_hm
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Re: legacy code and that "internet of things"
_hm   8/11/2013 8:45:39 AM
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This looks as opprotunity for more innovation. It may happen that all three approaches will be embraced - write new code for critical apps, device auto convert utilites for some predictable code and change code manually.

 

prabhakar_deosthali
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Can IPv4 and IPV6 co-exist in IOT
prabhakar_deosthali   8/11/2013 7:57:05 AM
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This may turn out to be an another monster like the Y2K .

What we need is a well laid out plan for transition from IPV4 to IPV6 based networks without having to rewrite the code.

Could it be done by accepting the IPV4 addresses in a IPV6 network by padding the additional bits having a fixed pattern non-repetitive in the IPV6 address allocation.

 

This way we can retain the old code and the systems and they can particpate in the new IPV6 network.

May be I am oversimplifying the problem , but just a thought.

 

WKetel
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legacy code and that "internet of things"
WKetel   8/10/2013 9:37:54 PM
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The author has made a very valid point, which comes at the problem from a different point of view, but points at the same disaster, running out of memory and crashing to a halt. As Mr Anderson points out, memory is a big deal, and it is far from infinite. While I don't understand fully the differences between IPV4 and IPV6, his point about the memory problems is certainly valid enough to make one ask "is this really a good idea?" And the prospect of programs just continuing to allot memory space and then not release it does certainly describe a very real and very fatal fault in a lot of current code. And the description of the effort needed to make changes is sort of depressing, I think.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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