Comtech EF Data CDM-750 - Manual (Page 114)

CDM-750 Advanced High-Speed Trunking Modem Revision 2
Front Panel Operation MN-CDM750
5–36
5.2.2.8.2 (CONFIG) Remote Control: Inband
Enable Inband Modem Control: Enable
( v)
Inband Modem Control allows remote Ethernet access via the Gigabit Ethernet data interfaces.
Use the ST arrow keys to Enable or Disable this feature, and then press ENTER.
When Inband is enabled, there is a physical connection between a Layer 2 switch
on the data IP interface ports (J5 | DATA, J6 | DATA, and J7 | OPTICAL) and a
separate Layer 2 switch tied to the physical management port (J4 | MGMT). For
this reason, if Inband control is enabled, a physical jumper connection should never
be connected from any data IP interface port to the physical management port, as
this will cause a networking loop and create a broadcast storm.
Similarly, when Inband is enabled, the data IP interface ports and management
port may not be physically connected to a single external switch, as this will cause
the same networking loop/broadcast storm environment. When Inband control is
desired along with external control, the physical connection between the data IP
interface ports and management port must be separated by a router or two
independent networks.
See Appendix F.ETHERNET NETWORK CONFIGURATION for further information and
illustrations about avoiding networking loops and broadcast storms