[nsp] OC3 interfaces for 7xxx vs. other OC12 transport options

[rwcrowe at comcast.net]

OMG look at that interface name !


--
Rob Crowe 
rwcrowe at comcast.net


-------------- Original message -------------- 

> > ds0s are not part of sdh tho, the docs say it can go down to 
> > E1s and do channelized E1s, this implies to me a kind of 2 
> > stage muxing is occuring, the first bit being SDH, the second 
> > being G704 
> 
> 
> Correct, we use these cards here at COLT: 
> 
> Great interface names ! :-) 
> 
> Serial5/0/0.1/1/3/1:0 is up, line protocol is up 
> Hardware is Channelized STM-1 
> Description: XXX 
> .... 
> 
> controller SONET 5/0/0 
> framing sdh 
> ! 
> au-4 1 tug-3 1 
> tug-2 1 e1 1 channel-group 0 timeslots 1-31 
> tug-2 1 e1 1 clock source internal 
> ... 
> tug-2 3 e1 1 channel-group 0 timeslots 26 
> tug-2 3 e1 1 channel-group 1 timeslots 27 
> tug-2 3 e1 1 channel-group 2 timeslots 25 
> tug-2 3 e1 1 channel-group 3 timeslots 24 
> tug-2 3 e1 1 channel-group 4 timeslots 30 
> tug-2 3 e1 1 channel-group 6 timeslots 31 
> tug-2 3 e1 1 channel-group 7 timeslots 17 
> tug-2 3 e1 1 channel-group 8 timeslots 20-23 
> tug-2 3 e1 1 channel-group 9 timeslots 28 
> 
> 
> They are very useful for delivering a huge number 
> of DS0/E1's 
> 
> The OC12 version is very good for DS-3's also: 
> 
> controller SONET 6/1 
> framing sdh 
> aug mapping au-4 
> au-4 1 vc-3 1 serial e3 
> au-4 1 vc-3 2 serial t3 
> au-4 1 vc-3 3 serial t3 
> au-4 2 vc-3 1 serial t3 
> au-4 2 vc-3 2 serial t3 
> au-4 2 vc-3 3 serial t3 
> 
> Problem with it is that a fully loaded box could have +thousands+ of 
> customers on it and if it reboots your helpdesk will be busy. 
> 
> Be wary and test these with the mux/DXC that you plan to use as there are 
> subtle 
> differences in the way that each mux talks. 
> 
> Regards, 
> Neil. 
> 
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