dslreports logo
site
 
    All Forums Hot Topics Gallery
spc

spacer




how-to block ads


Search Topic:
uniqs
13
share rss forum feed

andyross
Premium,MVM
join:2003-05-04
Schaumburg, IL
reply to NetFixer

Re: Modem developing an affinity for 1 of 4 downstream channels

My 6120 is evenly split between the channels. I think that 'favorite frequency' just means the first one it tries on a reboot. Just like a non-D3 modem, it just remember that last one used. Once it makes the connection, it is then assigned the other channels.

I wonder if the 6121 is counting ARP traffic or whatever that may only travel over the primary channel, but the 6120 isn't.


EG
The wings of love
Premium
join:2006-11-18
Union, NJ
kudos:10
FWIW, the UCD (Upstream Channel Descriptor) information that the modem needs to know in order to establish the frequency of the return / upstream channel to talk back to the CMTS on is contained on that favorite channel. It is my understanding the the UCD data is not present on all the forward / downstream channels on a system, just certain ones.