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Setting modem bridging mode via config file or SNMP?

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Setting modem bridging mode via config file or SNMP?


Does anyone know if it is possible to force a cable modem into bridging mode via a certain TLV in the configuration file or via SNMP? Any feedback on this would be appreciated.


Cable modems ARE bridges, are

Cable modems ARE bridges, are you talking about Cable modem /router combos? If so each manufacturer has its own oid (snmp) to do this. Most newer routers also support TR-69 which can do this in a vendor neutral way.


Specifying a Bridging Cable Modem through a Bridge Mode TLV

Motorola supports a “Bridge Mode TLV”, in a cable modem’s configuration file, that associates the cable modem’s traffic to a specified VLAN by specifying the cable modem as the Bridging CM.

The format of the Bridge Mode TLV is as follows:

Motorola vendor-specific TLV –Type = 43
–Length = 15
–Subtype = 3
–Length = 9
–Value = “vlan: VLAN-ID”

erouter TLV


you my try the erouter TLV specified:

The only thing you have to do is to put it into the docsis-bootfile:

NetworkAccess 1;
GenericTLV TlvCode 202 TlvLength 3 TlvValue 0x010100;

0: Disabled
1: IPv4 Protocol Enabled
2: IPv6 Protocol Enabled
3: Dual IP Protocol Enabled 4-255: Invalid


Vivi (not verified)


I stumbled upon this thread and i would like to know if there is any chance to use cisco epc 3208G (its this G in model name that is the problem) or actually force bridge on this thing and disable local nat, and get public ip on my router with dd wrt behind this cisco?

Thanks in advance

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