Chapter 4: Web management
NS3550-8T-2S Industrial Managed Switch User Manual
117
The page includes the following fields:
Basic settings
Object
Description
Protocol Version
The STP protocol version setting. Selections are
STP
,
RSTP
and
MSTP
.
Bridge Priority
Controls the bridge priority. Lower numeric values have higher priority. The
bridge priority plus the MSTI instance number, concatenated with the 6-byte
MAC address of the switch forms a Bridge Identifier.
For MSTP operation, this is the priority of the CIST. Otherwise, this is the
priority of the STP/RSTP bridge.
Forward Delay
The delay used by STP bridges to transition root and designated ports to
forwarding (used in STP compatible mode). Valid values are in the range of
4 to 30 seconds
Default:
15
Minimum: The higher of
4
or [
(Max. Message Age / 2) + 1
]
Maximum:
30
Max Age
The maximum age of the information transmitted by the Bridge when it is the
Root Bridge. Valid values are in the range 6 to 40 seconds.
Default:
20
Minimum: The higher of
6
or [
2 x (Hello Time + 1)
].
Maximum: The lower of
40
or [
2 x (Forward Delay -1)
]
Maximum Hop Count
This defines the initial value of remaining hops for MSTI information
generated at the boundary of an MSTI region. It defines how many bridges a
root bridge can distribute its BPDU information. Valid values are in the range
6
to
40
hops.
Transmit Hold Count
The number of BPDU's a bridge port can send per second. When exceeded,
transmission of the next BPDU is delayed. Valid values are in the range of
1
to
10
BPDU's per second.
