Hi all,
We got a new CMTS with MC28U with two downstream ports and due to scarcity of downstream frequency we need to use only one downstream port for all 8 Upstream ports. Is there any way to do it. Till now, we only 4 upstream ports up at time.
Hi all,
We got a new CMTS with MC28U with two downstream ports and due to scarcity of downstream frequency we need to use only one downstream port for all 8 Upstream ports. Is there any way to do it. Till now, we only 4 upstream ports up at time.
Sorry, I don't know about the cmts model you've mentioned. but the answer would seem basic.
the thought would be to feed half the downstreams with one of the downstream ports and use the same frequency for the other downstream for the other half of the system. the head end tech would need to do some wiring. would be a sort of narrow casting. as the number of subscribers increases, you would need to keep adding downstreams. it will because an issue to manage the modems unless you separate the downstream feeds. you do that with the upstreams now. just wire it so downstream A feeds upstreams 1,2,3 and 4. while the second downstream feeds upstreams 5,6,7 and 8 for example.
Just a thought....
Shutdown hole card- best default config for it.
Now
int cable x/0
cable upstream max-ports 8
and configure 8 upstram and downstream.
You are setup and ready to go!
Oh better try that on 12.2.33 SC tree of IOS don't know how it looks at the older version.
Good luck.
Hi,
I am changin the old CMTS BSR-1000 to ubr7246 Version 12.3(23)BC10, MC28U. My problem is that the downstream is not redeable for the CM, and the lab is working, because with BSR-1000 the CM gets online.
Is there any special configuration that i am not considere?.
Thanks in advance.
interface Cable6/0
no ip address
no cable packet-cache
cable downstream channel-id 7
cable downstream rate-limit
cable downstream annex B
cable downstream modulation 64qam
cable downstream interleave-depth 32
cable downstream frequency 651000000
no cable downstream rf-shutdown
cable downstream rf-power 60
cable upstream max-ports 4
cable upstream 0 connector 0
cable upstream 0 docsis-mode tdma
cable upstream 0 channel-width 1600000 1600000
cable upstream 0 minislot-size 4
cable upstream 0 range-backoff 3 6
cable upstream 0 modulation-profile 41
no cable upstream 0 shutdown
Cable6/0: Downstream is up, IF output is up
420553 packets output, 14298802 bytes, 0 discarded
0 output errors
0 total active devices, 0 active modems
Total downstream bandwidth: 30341 Kbps
Total downstream reserved/reservable bandwidth: 0/24273 Kbps
Estimated usable bandwidth: 26000 Kbps
Worst case latency for low latency queue: 0 usecs
Current Upper limit for worst case latency: 0 usecs
Ranging lists counts
Maintenance list 0, max 0
Continuous list 0, max 0
Pending list 0, max 0
no upstream frequency