Comtech EF Data CDM-750, Installation And Operation Manual

Page: 112 / 300

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 f or further information and
illustrations about avoiding networking loops and broadcast storms