I have this weird issue with one of my MC-88V line cards. The cmts is a uBR7246VXR with 12.2(33)SCG3. I'm not doing anything too fancy, just 4x2 bonded channels per MAC domain. Anyhow here is the problem. On one downstream(C4/1) we have 1 rf-channel that will not come up, the other 3 are up and working fine(42dB SNR). It will start to initialize for a while then go to disabled(DOCSIS LB group). First I though something was stomping on that freq(705) but the spectrum analyzer showed otherwise, no noise or anything when I shut the channel down to check the noise floor.
Has anyone done a package with upstream speeds at 25megs or 45megs, and if so, how are your upstreams and cm configs set up? I've got 2 bonded 64qam 6.4mhz wide upstreams, and I'm finding it more difficult to get the upstreams to actually run at the provisioned speeds, more than 18mbs. I can get it closer by setting the SfMaxTrafficBurst up higher, but that surely I don't want that number to be ridiculously high?
After increasing the number of available cable downstreams on fiber node from 4 to 8 im experiencing Docsis Partial service status on all cable modems that are capable to work in 8x4 configuration (cisco). Instead of working in 8x4 mode all modems work only at 4x4 mode and report first four downstream channels in terms of frequency as impaired. Modems report that the reason for impairment is bad rcs.
Fiber node has 8 consecutive downstream channels.
I have a network ip not public and a network of public ip on the same interface cable of a cmts ubr7246vxr. how do i network ip not public access the network ip public. I've tried the loopback interface and route-map but failed.
Hello, I am trying to config an Arris cadant c3 for the first time to test before replacing a Knovative in the field. This router came with its own Up-converter for the downstream and an output of 45-65 Dbmv. I cant get over the very first thing of getting the modems to acquire downstream lock to even start to get to the rest of the configuration. This is connecting through a Blonder Tongue diplexer currently and a series of splitters and pads i have been attenuating the signal with up to -70Db.
Can anyone help me how to close service in the modem configuration file except "network access 0"???
Any ideas how to block the service so that the MTA can work fine?
Hello everyone! I found this website looking for a solution with a problem that I am experimenting on a Cisco UBR7246VXR CMTS. I am having problems with the CPU utilization... The CPU is getting up to 99% when the traffic load is high and the problem is related with the IP Input Process. I am using NAT to provide access to my customers...
I have a system currently with a C7246VXR with a NPE-G1 and a MC28U. We have run into an issue with IP Address Spacing and want to reclaim with NAT. We have about 600 Modems on this system with about 400 of those Arris EMTA's. Normally our CPU usage is 10-15% at peak. When I have enabled NAT through a Single IP things seem to be ok, but as the day progressed the CPU usage kept creeping up. Even though our calls never peak over about 20 at any given time the cpu usage kept climbing. Its now at 86%.... Any suggestions?
