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DES-3010F/DES-3010FL/DES-3010G/DES-3016/DES-3018/DES-3026 Fast Ethernet Switch Manual
104
Bridge Max Age
(6-40 Sec)
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.
Bridge Hello Time
(1-10 Sec)
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.
Bridge Forward Delay
(4-30 Sec)
The Forward Delay can be from 4 to 30 seconds. Any port on the Switch spends this time
in the listening state while moving from the blocking state to the forwarding state.
Bridge Priority (0-61440)
A Priority for the Switch can be set from 0 to 61440. This number is used in the voting
process between Switches on the network to determine which Switch will be the root
Switch. A low number indicates a high priority, and a high probability that this Switch will be
elected as the root Switch.
Default Path Cost
This read-only field displays the protocol used in determining the default path cost per port.
802.1t will calculate this 32-bit cost value through the use of a specific formula based on
the port bandwidth.
STP Version
Use the pull-down menu to choose the desired version of STP to be implemented on the
Switch. There are two choices:
STPCompatibility - 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.
TX Hold Count (1-10)
Used to set the maximum number of Hello packets transmitted per interval. The count can
be specified from 1 to 10. The default is 3.
Forwarding BPDU
This field can be Enabled or Disabled. When Enabled, it allows the forwarding of STP
BPDU packets from other network devices. The default is Enabled.
Click Apply to implement changes made.