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Old 10-04-2014, 09:54   #25
Sephiroth
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Re: Best way to escalate a utilisation fault?

Quote:
Originally Posted by ianch99 View Post
Would customers routing in from Winchester be affected by customers (Students) in Southampton? I guess this depends on the network topology and which network segments route into which CMTS (Southampton has 9 of them I think). Only VM has the answers to these questions I suppose
[SEPH]: The effect of Soton on Winchester would likely only be at peering points and then if both geographies were trying to do the same thing. So, generally and IMO, no.

Question for the cable network gurus: where is utilisation actually measured? at the CMTS? If so, can you have one network segment overloaded but others under-utilised for the same CMTS? Not that it matters, just curious ...
[SEPH]: There are several measurement points, but if the network is properly designed, the two that matter are the CMTS and the line card to wwhich your segment is connected. The current CMTS models rarely get overloaded. The line cards, however are the termination point for user circuits and they are the first port of call when investigating utiliation. A simple resegmentation puts one or more optical nodes onto another line card. A more complex resegmentation, when all line card slots are used and running at normal capacity, then another CMTS has to be found for line cards to go into. All of what I've just mentioned can be considered as a repatching exercise.

So yes, one line card can be under-utilised while another can be over-utilised. Network Team will look at that, see if it's a trend and then load balance accordingly.
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