Hi Folks,
If the following sounds too basic, then you are correct since I am very new to CMTS world. Now to my question
Given the following:
GigabitEthernet2/0/0
I understand the first string (GigabitEthernet) represents the "media type"
2 represents the "solt #"
0 represents "port #"
I would like to know what the last number is for ?
Thanks in advance
rogers42
Depending on the media - it could be a subinterface (on Ethernet) or logical channel (on a cable blade). http://en.wikipedia.org/wiki/Subinterface has a little bit of info.
Thanks for the reply.
For a cable blade, does the "logical channel" refer to the US & DS channels ? If so, is there a standard convention that is followed ? i.e. 0= US, 1,2 = DS channels etc
Thanks in advance
rogers42
The layout may specific to the brand of CMTS that you're running; I'm not aware of any standard.
I often see a layout like this with Motorola:
9/0/D1/U3
That's cable blade 9, mac domain 0, downstream 1, upstream 3. That nomenclature does not show any logical channels; if there were, it would probably be at the end, like ...U3/1. Logical channels are different modulation profiles running on the same upstream channel -- for example, a subchannel for QPSK, one for 16QAM, and one 64QAM. Your modems would be arranged on each logical channel based on their signal quality and bandwidth needs. Hope that helps-
This makes sense.
Thanks
rogers42