01-20-2006 12:44 AM
Im having problem reading if im running EuroDOCSIS or just DOCSIS om my uBR7114E CMTS's. Want to know the max bw on my downstream.
It all looks like im running Edocsis :
Cable1/0 Downstream is up
Frequency 135.5000 MHz, Channel Width 8 MHz, 64-QAM, Symbol Rate 6.952000 Msps
FEC ITU-T J.83 Annex A, R/S Interleave I=12, J=17
-----------
Cable1/0 Upstream 0 is up
Frequency 59.984 MHz, Channel Width 3.200 MHz, QPSK Symbol Rate 2.560 Msps
-----------
interface Cable1/0
cable downstream annex A
cable downstream modulation 64qam
cable downstream frequency 135500000
cable downstream rf-power 60
cable upstream 0 frequency 60000000
cable upstream 0 channel-width 3200000
--------
cmts#sh interfaces ca1/0
Cable1/0 is up, line protocol is up
MTU 1500 bytes, BW 37500 Kbit, DLY 1000 usec,
This line says 37,5mbit but
Available Bandwidth 28125 kilobits/sec
says something else.
----
cisco uBR7114E (EGR) processor (revision A)
----
ubr7100-k8p-mz.122-15.BC2f.bin
----
All modems are SurfBoard 4200E and 5100E models so .. we could run EuroDocsis.
Hope someone can give me some info on this
Martin
DK
Solved! Go to Solution.
01-20-2006 11:20 AM
Hello Martin,
I think you are indeed running EuroDOCSIS, have a look at the table in the link below, the channel width (8Mhz) and the Carrier to noise ration (64 QAM) match your output:
Table A-8 EuroDOCSIS Cable Downstream RF Specifications
HTH,
GP
01-20-2006 11:20 AM
Hello Martin,
I think you are indeed running EuroDOCSIS, have a look at the table in the link below, the channel width (8Mhz) and the Carrier to noise ration (64 QAM) match your output:
Table A-8 EuroDOCSIS Cable Downstream RF Specifications
HTH,
GP
01-20-2006 02:02 PM
Hi and thx for the reply.
I have been studying the information very hard but i still cant explain the info i get on the :
show interface ca1/0 then. Been looking at bug navigator to see if it could be an bug. Been reading the release notes on 12.2 and 12.3, no clue about the information from the interface.
Would like to take one of our uBR7114E's out of production just to test the bandwidth on downstream this but have to many customers on them all.
10mbit is alot on downstream, the diff. between EuroDocsis and Docsis.
Martin
01-26-2006 02:14 PM
question solved :
the CMTS is running WFQ, thats why the counter is on
28125 mbit. 28125/37500*100 = 75 % of the total bw,
thats how much you can reverse with WFQ.
Case Solved
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide