Comtech EF Data DTMX5000 SpectraCast - Manual (Page 47)

DTMX5000 IP Gateway Operation
Rev. 1 3–11
3.2.2.7 Promiscuous
Path: Edit CFG.INI Parameters/Network Parameters/Promiscuous.
Description: Enables/disables Promiscuous mode.
Enabled When Promiscuous mode is Enabled, the Gateway operates as a bridge (as opposed to a
router), transparently interconnecting two remote LANs into one logical LAN.
For example:
The company has headquarters and a subsidiary. Majority of the traffic is on
the local LAN. A event warrants the need to access the remote LAN.
Promiscuous mode enables the contact of any host on the remote LAN.
Each datagram has a manually entered MAC address (as opposed to the MAC address of
the unit) that defines the destination host. In Promiscuous mode, the unit’s NIC card
allows this MAC address to be transmitted. The Gateway then uses it to identify the
destination MAC address and the LAN to which it belongs.
Disabled When Promiscuous mode is Disabled, the Gateway operates as a router, connecting two or
mode LANs that have different IP addresses. In router mode, datagrams are sent with the
unit’s MAC address as the destination. The unit receives the datagrams and then maps the
source IP address from one LAN to a destination IP address on a second LAN, according
to a routing table. When this mode is selected, Unregistered Users is automatically
Disabled.
Note: The unit must be rebooted in order for settings to take effect.
3.2.2.8 Unregistered Users
Path: Edit CFG.INI Parameters/Network Parameters/Unregistered
Users.
Description: Specifies the way in which the Gateway handles packets
received for users that have not been registered (in the CCU
or via the NMS or terminal) and it does not recognize.
Enabled When this parameter is Enabled, packets for unregistered users are sent using the MAC
address of the destination LAN. This is only valid if Promiscuous mode is Enabled. The
unit knows which MAC address to append because it already accessed the LAN via the
bridge. Packets are sent to unregistered users using the default QoS parameters, with no
encryption.
Disabled When this parameter is Disabled, packets sent to unregistered users are discarded since the
destination MAC address is unknown.
Note 1: Unregistered users will automatically be added to the default group, Group 1.
Note 2: Unregisterd users is automatically disabled when Promiscuous Mode is Disabled.