DGS-3024 Gigabit Ethernet Switch Manual
| Figure 7- 15. STP Bridge Global Settings window - MSTP | ||
The following parameters can be set: | |||
|
|
|
|
Parameter |
| Description | |
|
|
|
|
STP Status |
| Use the |
|
|
| default is Disabled. |
|
|
|
|
|
STP Version |
| Use the |
|
|
| on the Switch. There are three choices: |
|
|
| STP - Select this parameter to set the Spanning Tree Protocol (STP) globally on |
|
|
| the Switch. |
|
|
| RSTP - Select this parameter to set the Rapid Spanning Tree Protocol (RSTP) |
|
|
| globally on the Switch. |
|
|
| MSTP - Select this parameter to set the Multiple Spanning Tree Protocol (MSTP) |
|
|
| globally on the Switch. |
|
|
|
|
|
Hello Time |
| The Hello Time can be set from 1 to 10 seconds. This is the interval between two |
|
|
| transmissions of BPDU packets sent by the Root Bridge to tell all other Switches |
|
|
| that it is indeed the Root Bridge. This field will only appear here when STP or |
|
|
| RSTP is selected for the STP Version. For MSTP, the Hello Time must be set on |
|
|
| a port per port basis. See the STP Port Settings section for further details. |
|
|
|
|
|
Max Age |
| The Max Age may be set to ensure that old information does not endlessly |
|
|
| circulate through redundant paths in the network, preventing the effective |
|
|
| propagation of the new information. Set by the Root Bridge, this value will aid in |
|
|
| determining that the Switch has spanning tree configuration values consistent with |
|
|
| other devices on the bridged LAN. If the value ages out and a BPDU has still not |
|
|
| been received from the Root Bridge, the Switch will start sending its own BPDU to |
|
|
| all other Switches for permission to become the Root Bridge. If it turns out that |
|
|
| your Switch has the lowest Bridge Identifier, it will become the Root Bridge. The |
|
|
| user may choose a time between 6 and 40 seconds. The default value is 20. |
|
|
|
|
|
Forward Delay (4 - 30 |
| The Forward Delay can be from 4 to 30 seconds. Any port on the Switch spends |
|
Sec) |
| this time in the listening state while moving from the blocking state to the for- |
|
|
| warding state. |
|
|
|
|
|
Max Hops |
| Used to set the number of hops between devices in a spanning tree region before |
|
|
| the BPDU (bridge protocol data unit) packet sent by the Switch will be discarded. |
|
37
