Black Box ET0010A User Manual
ETEP Configuration
308
EncrypTight User Guide
IP Address and Subnet Mask
Enter the IP address and subnet mask that you want to assign to the port, in dotted decimal notation.
Default Gateway
The default gateway identifies the router’s local access port, which is used to forward packets to their
destination. The gateway IP address must be on the same subnet as the port’s IP address. In
destination. The gateway IP address must be on the same subnet as the port’s IP address. In
,
the remote default gateway is the router port 192.168.144.100. The local default gateway address is
192.168.144.1.
192.168.144.1.
A default gateway IP address is required when the ETEP is in a routed network. If the ETEPs are in the
same subnet with no routers between them you may leave the default gateway field blank. The ETEP
determines if the packet destination is on the same subnet as the port, and if so, uses ARP to resolve the
destination MAC address. If the packet destination IP address is on a different subnet, the ETEP sends
the packet to the designated default gateway.
same subnet with no routers between them you may leave the default gateway field blank. The ETEP
determines if the packet destination is on the same subnet as the port, and if so, uses ARP to resolve the
destination MAC address. If the packet destination IP address is on a different subnet, the ETEP sends
the packet to the designated default gateway.
Figure 105 Remote port default gateway in a routed network
Related topic:
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Transmitter Enable
The ETEP can be configured to propagate a loss of signal event detected at one of its data ports to the
device connected to its other data port. The ETEP performs this function by monitoring for loss of signal
at the port’s receiver. For example, when the loss of signal is detected on the ETEP’s remote port, the
local port transmitter is disabled, generating a loss of signal event in connecting device’s port. When the
loss of signal event clears on the remote port, the local port transmitter is enabled, clearing the event in
the connecting device’s port. Similarly, when a loss of signal is detected on the local port, the remote port
transmitter is disabled.
device connected to its other data port. The ETEP performs this function by monitoring for loss of signal
at the port’s receiver. For example, when the loss of signal is detected on the ETEP’s remote port, the
local port transmitter is disabled, generating a loss of signal event in connecting device’s port. When the
loss of signal event clears on the remote port, the local port transmitter is enabled, clearing the event in
the connecting device’s port. Similarly, when a loss of signal is detected on the local port, the remote port
transmitter is disabled.
Alternatively, the ETEP port transmitter can be configured to always remain enabled, regardless of the
other port’s link state. In this state the ETEP can reliably recover from a link loss. But because the
transmitter is always on, the appliance may inadvertently mask cable or device failures in the network.
other port’s link state. In this state the ETEP can reliably recover from a link loss. But because the
transmitter is always on, the appliance may inadvertently mask cable or device failures in the network.