Alpha Technologies DSM3 for XM2 - Technical Manual - Manual (Page 15)

15 745-814-B8-001, Rev. C (03/2014)
The modem community strings should be set in the DOCSIS Configuration File. Failure to set
community strings will result in a less secure system. For automatically updating modem firmware
with the DOCSIS Configuration File, see Section 5.1, Upgrading DSM3 Series Modem Firmware.
3.3.1 Setting Modem Community Strings — DOCSIS 2.0 (IPv4) Method
Set the modem community strings with the DOCSIS Configuration File by including the following
SNMP parameters:
NOTE:
MIB Parameter Object ID Description Value
docsDevNmAccessIp 1.3.6.1.2.1.69.1.2.1.2.x The IP address (or subnet) of the network
management station
e.g. 10.20.30.0
docsDevNmAccessIpMask 1.3.6.1.2.1.69.1.2.1.3.x The IP subnet mask of the network
management stations
e.g. 255.255.255.0
docsDevNmAccessCommunity 1.3.6.1.2.1.69.1.2.1.4.x The community string matched to this IP
address net mask entry
alphanumeric string
docsDevNmAccessControl 1.3.6.1.2.1.69.1.2.1.5.x The level of access granted 1= none
2= read only
3= read/write
docsDevNmAccessInterfaces 1.3.6.1.2.1.69.1.2.1.6.x Specifies the set of interfaces from which
requests from this NMS will be accepted
0x40 : Cable interface (typical)
0x80 : Ethernet interface
0xC0 or 0x00 : Both interfaces
docsDevNmAccessStatus 1.3.6.1.2.1.69.1.2.1.7.x Controls and reflects the status of rows in
this table
4
Table 3-1, Modem Community String Parameters — DOCSIS 2.0 (IPv4) Method
3.0 Network Configuration, continued
3.3 The DOCSIS Configuration File
A cable modem’s DOCSIS Configuration File is a type-length-value (TLV) file that contains important
operational parameters as defined by the DOCSIS standards. It provides certain settings for the cable
modem. In addition to standard entries, settings in the DOCSIS Configuration File should include the
modem’s community strings and if an upgrade is necessary, firmware upgrade parameters. Place the
Configuration File in the TFTP root directory.
The DSM3 Series cable modem interface can support both IPv4 and IPv6 addressing schemes. The
required DOCSIS Configuration File operational parameters will differ depending on company policies,
cable modem firmware versions and IP addressing schemes. The following DOCSIS Configuration File
details listed in this manual are general guidelines. Please consult the published DOCSIS Specification
resources (CableLabs) for additional DOCSIS Configuration File details and guidelines.
To build a DOCSIS Configuration File, use a DOCSIS TLV editor program.
See the example Configuration Files in Sections 3.3.5 and 3.3.6.
Note: X denotes the index of the SNMP entry