D-Link DES-5024 Product Manual - Page 69

Root Bridge, Root Port

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Fast Ethernet Switching System User's Guide The switch with the lowest Bridge Identifier is the Root Bridge. It is best to make the Root Bridge the best switch on the network to ensure the best network performance and reliability. Root Bridge Specifies the MAC address of the Root Bridge. The DES-5024 may or may not be the root bridge. The DES-5024 is the default root bridge. Root Port Specifies the preferred path to the Root Bridge. Only one path per bridge can exist. The default setting is none. Table 7: User Selective STA Parameters STA parameters Settings Effects Comment Enable/Disable Bridge Priority Hello Time Max Age Time Forward Delay Enable/ Disable Lower the #, higher the priority 1 - 10 seconds Participate in or remove from STA Increases chance of becoming the Root Bridge No effect, if not Root Bridge 6 - 40 seconds 4 - 30 seconds Compete for Root Bridge, if BPDU is not received High # delays the change in state Port Level STA parameters Enable/ Disable Enable/ disable Port Priority Lower the #, higher the priority Enable or disable LAN segment Increases chance of becoming the Root Port Enable in a SNMP network. Avoid, if the switch is used in workgroup level of a large network Never set greater than Max Age Time Avoid low number for unnecessary reset of Root Bridge Max Age < 2 x (Forward Delay 1) Max Age > 2 x Hello Time + 1) Disable a port for security or problem isolation Managing the DES-5024 61

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Fast Ethernet Switching System User’s Guide
Managing the DES-5024
61
The switch with the lowest Bridge Identifier is the Root Bridge. It is best to make the
Root Bridge the best switch on the network to ensure the best network performance and
reliability.
Root Bridge
Specifies the MAC address of the Root Bridge. The DES-5024 may or may not be the
root bridge. The DES-5024 is the default root bridge.
Root Port
Specifies the preferred path to the Root Bridge. Only one path per bridge can exist. The
default setting is none.
Table 7: User Selective STA Parameters
STA parameters
Settings
Effects
Comment
Enable/Disable
Enable/
Disable
Participate in or
remove from
STA
Enable in a
SNMP network.
Bridge Priority
Lower the
#, higher
the
priority
Increases
chance of
becoming the
Root Bridge
Avoid, if the
switch is used in
workgroup level of
a large network
Hello Time
1 – 10
seconds
No effect, if not
Root Bridge
Never set greater
than Max Age
Time
Max Age Time
6 – 40
seconds
Compete for
Root Bridge, if
BPDU is not
received
Avoid low number
for unnecessary
reset of Root
Bridge
Forward Delay
4 – 30
seconds
High # delays
the change in
state
Max Age < 2 x
(Forward Delay -
1)
Max Age > 2 x
Hello Time + 1)
Port Level STA parameters
Enable/ Disable
Enable/
disable
Enable or
disable LAN
segment
Disable a port for
security or
problem isolation
Port Priority
Lower the
#, higher
the
priority
Increases
chance of
becoming the
Root Port