192.168.100.1/scanover.htm
It might ask for a password, in that case please try : freq3871
These mibs are not there anymore in D3 modems.
However what we can try to do is the following.
You let the modems come online on the correct frequency in the lab. When the modem is online on this frequency the frequency gets stored in nvram.
When you bring the modem into the field this frequency will be scanned first.
I believe we can store up to 8 frequencies this way.
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Again I investigated more and find more information for you :
I don’t believe there are SNMP MIBs available but there are DOCSIS TLVs that can be used (See TLV-41 section below).
If there are no cached or preset frequencies, the modem will start to scan from the top to bottom of the spectrum. You can use the scanning override webpage on the LAN side to force the modem to a specific frequency. See solution below.
As I mentioned, some customers perform some kind of staging in their lab/warehouse where they bring the modem online on a specific frequency, say F1, which will cached.
When the modem is installed in the field, the modem will first lock directly to the cached frequency F1 without scanning the spectrum. My understanding you can cache 5 DS frequencies.
=============================== RF CACHE INFO ===================================
DS frequency db in NVRAM:
Number of cached freq = 5
Head = 0
Tail = 4
Place 0 - DS freq = 747000
Place 1 - DS freq = 615000
Place 2 - DS freq = 723000
Place 3 - DS freq = 627000
Place 4 - DS freq = 645000
Some customers set a DS freq that all modems lock on initially and can then be moved to a different DS freq during registration via CMTS or config file override.
NOTE: As you probably know, for the modem to take any config file settings (like override, ds freq list, etc), it first have to get online.
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Here you go also a solution that exists to explain this :
PS Solution 300391: Force Tuning a CM / eMTA to a Downstream Frequency
Follow these steps to specify a downstream frequency and optional Upstream Channel Descriptor (UCD). You can specify up to five frequencies to search; if the E-UE does not find a carrier on one of those frequencies, it begins the normal scanning process at 861 MHz.
Connect an Ethernet cable between the laptop and the CM / eMTA.
Go to a web browser and type in: 192.168.100.1/scanover.htm
Make sure the Ethernet port is in the same subnet as 192.168.100.1.
You will be prompted for a password; the password is: freq3871.
In the Downstream Frequency (MHz) field, enter the frequency you wish to lock in.
For example, enter 581 to specify 581 MHz.
(Optional) Enter a UCD identifier in the Upstream Channel ID field.
Click on 'Change Freq' to force the CM / eMTA to that frequency. Optionally, you can click the Save Freq button to store the frequency in the cache. This can be used to pre-provision the modem to a specific frequency.
Note 1: The Scanning Override screen may be accessed only from a LAN interface before the Telephony Modem has registered (WAN access is not allowed). If the modem has registered, it redirects attempts to access the Scanning Override screen to the Status screen.
You may also look into this (From TS 9.1 Firmware Guide):
Support for TLV-41 (Downstream Channel Lists)
TLV-41 provides Downstream Channel List support. When provisioned in the CM configuration file, downstream channel lists provide the ability to specify an allowed range of downstream frequencies to use during downstream scanning operations.
When Downstream Channel Lists are specified in the configuration file, the CM does not use any frequencies outside of the provisioned range without specifically being directed to do so by the CMTS. Also, this list overrides the last operational channel value stored in NVRAM. If the CM (portion of the E-UE) loses sync with the CMTS, the CM retains the provisioned list of downstream channels provided in the configuration file, and uses them to search for a new downstream during subsequent MAC re-initialization and downstream scanning.
Full details on the operation of this feature and TLV-41 parameters can be found in Appendix C of the DOCSIS 2.0 RFI specification (SP-RFIv2.0-I11-060206).
Example:
{DownstreamChannelList
{SingleDownstreamChannel
{SingleDSChannelFreq 749000000}
}
{SingleDownstreamChannel
{SingleDSChannelFreq 794000000}
}
{DownstreamFreqRange
{DSFreqRangeStart 400000000}
{DSFreqRangeEnd 600000000}
{DSFreqRangeStepSize 6000000}
}
}