R
EVISED
2018-09-21
W
EB
C
ONFIGURATION
S
OFTWARE
D
RAWING
N
O
. LP0991-G
RSTP
N-Tron
®
Series NT24K
®
Software Manual
2-104
Bridge Identifier MAC:
The unique MAC address of the Bridge is displayed in this field. This is possibly a
different network device.
Hello Time (Sec):
This field indicates the Hello time, when this bridge is the Root Bridge or is attempting to
become the Root Bridge. This is the time interval, in seconds, between the transmission of Configuration
BPDUs by Designated Ports. The range is 1 - 10. The default value is 1.
Forward Delay (Sec):
This field displays the Forward Delay, when this bridge is the Root Bridge or is
attempting to become the Root Bridge. This is the time spent, in seconds, by legacy STP Bridges in
transitioning Root and Designated Ports to Forwarding. This delays Port transitions until other bridges
have received spanning tree information. The range is 4 - 30. The default value is 13 seconds.
Max Age (Sec):
This field displays the Max Age when this bridge is the Root Bridge or is attempting to
become the Root Bridge. For RSTP, this is the maximum hops allowed for any protocol message before it
is discarded and no longer retransmitted. For STP, this is the maximum time, in seconds, that a bridge will
wait for Configuration BPDUs before deciding it is no longer connected to the root bridge. The range is
6 - 40. The default value is 16 seconds.
Tx Hold Count:
This is the maximum number of configuration BPDUs that can be transmitted in one
second from a port on this Bridge before transmission is throttled. The range is 1 to 10. The default value
for this field is 6.
Topology Changes:
This is the number of RSTP topology changes since the switch has been powered on
or rebooted.
RSTP Status:
This is the current status of the RSTP protocol on this bridge. The available options for this
field are RSTP, Force STP or Disabled.
Note:
RSTP & N-Ring are different network topology protocols and cannot share links or segments. If
a port is both an RSTP port and an active N-Ring port, then the port will be disabled for RSTP.
Note:
Do not create redundant network paths unless either RSTP or N-Ring is enabled.
Note:
If a port is both an RSTP port and an enabled trunk group member, then the port will be disabled
for RSTP. The RSTP port status can be seen under advanced RSTP ports.
Note:
It is recommended that an RSTP network consist of RSTP capable switches.
Note:
RSTP is supported on only one VLAN.
Note:
When operating in a VLAN with legacy STP devices, use these values for the Bridge: Hello
Time (Sec) = 2, Forward Delay (Sec) = 15 and Max Age (Sec) = 20.
Click on the
Modify
button and the following dialog window will appear:
Make the required modifications, and click on the
Update
button. To save the changes made, navigate to the
Configuration
menu and click on the
Save
button.Ports