This is part 4 of an 4-part series (so far 4 parts) on the ToS field (i.e. Differentiated Services Field) of IP frames. I finally get into how all this relates to NetFlow in 2009. Make sure you have already read Part 1, Part 2 and Part 3 of this blog.
ToS and DSCP part 4
At the end of Part 3 of this blog series I digressed very briefly on how CBQoS can be used to modify DSCP values on packets which come into the router. In other words, VoIP traffic that comes in on ports 4569 and 5060 could enter a router with one DSCP value 0×00 and leave with a completely different one e.g. 0xEF (i.e. 11101111). Read more »
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