Chapter 5: Local Management
5-64
DLEHF-MA User’s Guide
Other Considerations
•
If a network loop exists and SmartTrunk becomes disabled, and
Spanning Tree is operational, then the Spanning Tree algorithm will
respond and block the necessary ports.
•
If SmartTrunk becomes disabled, and a network loop exists, and
Spanning Tree is not-operational (disabled), then an infinite packet
loop would occur, taking down the network.
•
If a port is disabled and as a result SmartTrunk is no longer active, then
all traffic is redirected over the remaining port(s).
•
If three or more interface modules, such as the DLEHF-MA, or
standalone devices are connected together in a loop condition and all
the ports that connect the loop are set to NETWORK, the results are
unpredictable. In this case all ports are assigned as NETWORK ports
and none are configured as USER ports. This is deemed an illegal
configuration.
•
If a network loop exists when a port is disabled, then SmartTrunk will
reconfigure the remaining ports and continue to distribute traffic.
•
If a device has multiple instances to separate modules installed in the
same chassis, the results are unpredictable. DIGITAL does not
recommend implementing this type of configuration.
5.19.2
SmartTrunk Configuration Screen
The SmartTrunk Configuration screen, Figure 5-23, allows the user to
logically group interfaces together between devices to achieve greater
bandwidth between the devices.
To access the SmartTrunk Configuration Screen from the Module
Configuration Menu screen, use the arrow keys to highlight the
The SmartTrunk Configuration screen displays only if the
operational mode of the chassis or the DLEHF-MA has been
set to 802.1D SWITCHING or 802.1Q SWITCHING. Refer to
Section 5.7.7 for instructions on configuring the chassis to
operate in this mode and Section 5.15.9 for instructions on
configuring the DLEHF-MA to operate in this mode.
