Users Guide

Table Of Contents
Stacking 229
ports in the rear of the switch. The N3100-ON supports a pluggable stacking
module in the rear. Stacking on Ethernet ports is not supported. The fixed
stacking ports show as TwentyGigabitStacking and are abbreviated Tw.
NSF is enabled by default. NSF can be disabled to redirect the CPU resources
consumed by data checkpointing; however, this is ill-advised, as
checkpointing consumes almost no switch resources. Checkpointing only
occurs when a backup unit is elected, so there is no need to disable the NSF
feature on a standalone switch. When a new unit is added to the stack, the
new unit is given the configuration of the stack, including the NSF setting.
OSPF implements a separate graceful restart control that enables NSF for
OSPF. OSPF graceful restart is not enabled by default.