Interlogix GE-DSSG-244-POE User Manual - Manual (Page 120)

IFS NS3601-24P/4S GE-DSSG-244 and 244-POE User Manual
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between switches B and C. The two (optional) Gigabit ports (default port cost = 20,000) on switch A are connected to one (optional)
Gigabit port on both switch B and C. The redundant link between switch B and C is deliberately chosen as a 100 Mbps Fast Ethernet
link (default port cost = 200,000). Gigabit ports could be used, but the port cost should be increased from the default to ensure that
the link between switch B and switch C is the blocked link.
STP Bridge Configuration
This page allows you to configure STP system settings. The settings are used by all STP Bridge instances in the Switch or switch
Stack. The Managed Switch support the following Spanning Tree protocols:
‧ Compatiable -- Spanning Tree Protocol (STP): Provides a single path between end stations, avoiding and eliminating
loops.
‧ Normal -- Rapid Spanning Tree Protocol (RSTP) : Detects and uses of network topologies that provide faster spanning
tree convergence, without creating forwarding loops.
‧ Extension – Multiple Spanning Tree Protocol (MSTP) : Defines an extension to RSTP to further develop the usefulness
of virtual LANs (VLANs). This "Per-VLAN" Multiple Spanning Tree Protocol configures a separate Spanning Tree for
each VLAN group and blocks all but one of the possible alternate paths within each Spanning Tree.
The STP Bridge Configuration screen is shown
Figure 4-7-7 .
Figure 4-7-7 STP Bridge Configuration page screenshot
The page includes the following fields:
Basic Settings
Object Description
•
Protocol Version The STP protocol version setting. Valid values are STP, RSTP and MSTP.
•
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 4 to 30
seconds
-Default: 15
-Minimum: The higher of 4 or [(Max. Message Age / 2) + 1]
-Maximum: 30