D-Link DGS-3204 - Switch - EN 100VG-AnyLAN, User Manual

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Gigabit Ethernet Switch User’s Guide
54 Using the Console Interface
♦
Time Since Topology Changes(sec) Read-only
object displays the last time changes were made to
the network topology. These changes usually occur
when backup paths are activated due to primary
path failures.
♦
Topology Change Count Read-only object displays
the number of times (since the current management
session with the device was started) changes were
made to the network topology. Changes usually
occur on the network when backup paths are
activated.
♦
Designated Root Read-only object displays the
MAC (Ethernet) address of the bridge/switch on the
network that has been chosen as the STP root.
♦
Root Cost Read-only object displays the cost for
the path between the switch and the root bridge. If
the switch is the root bridge, then the root cost is
zero.
♦
Root Port Read-only object identifies the port (on
the bridge) that offers the least path cost from the
bridge to the root bridge. In the event of a network
loop, data packets will pass through the root port.
♦
Max Age(Sec) Read-only object indicates the
maximum age of STP information learned from the
network (on any port) before it is discarded.
♦
Forward Delay(sec) Read-only object indicates
how fast any port on the bridge can change its
spanning state when moving towards the
forwarding state. The value determines how long
the port stays in each of the listening and learning
states, which precede the forwarding state.