Switching
[ Switching > L2-Redundancy > Spanning Tree > Global ]
205
RM GUI GRS
Release
8.0
09/2019
Forward delay [s]
≥ (
Max age
/2) + 1
If you enter values in the fields that contradict this relationship, then the device replaces these
values with the last valid values or with the default value.
Max age
Specifies the maximum permitted branch length for example, the number of devices to the root
bridge.
Possible values:
6..40
(default setting:
20
)
If the device takes over the role of the root bridge, then the other devices in the network use the
value specified here.
Otherwise, the device uses the value specified by the root bridge. See the
Root information
frame.
The
Spanning Tree
protocol uses the parameter to specify the validity of STP-BPDUs in seconds.
Tx holds
Limits the maximum transmission rate for sending BPDUs.
Possible values:
1..40
(default setting:
10
)
When the device sends a BPDU, the device increments a counter on this port.
If the counter reaches the value specified here, then the port stops sending BPDUs. On the one
hand, this reduces the load generated by RSTP, and on the other when the device does not receive
BPDUs, a communication interruption can be caused.
The device decrements the counter by
1
every second. In the following second, the device sends
a maximum of
1
new BPDU.
BPDU guard
Activates/deactivates the BPDU Guard function in the device.
With this function, the device helps protect your network from incorrect configurations, attacks with
STP-BPDUs, and unwanted topology changes.
Possible values:
marked
The
BPDU guard
is active.
– The device applies the function to manually specified edge ports. For these ports, in the
Switching > L2-Redundancy > Spanning Tree > Port
dialog,
CIST
tab the checkbox in the
Admin
edge port
column is marked.
– If an edge port receives an STP-BPDU, then the device disables the port. For this port, in the
Basic Settings > Port
dialog,
Configuration
tab the checkbox in the
Port on
column is
unmarked
.
unmarked
(default setting)
The
BPDU guard
is inactive.
To Next Page
Loading...
