ZT8101 Intel (CPU), ZT8101 Datasheet - Page 23

• Manufacturer Part Number: ZT8101
• Manufacturer: Intel (CPU)

Specifications of ZT8101

• Lead Free Status / RoHS Status: Supplier Unconfirmed

4.10
4.10.1
4.10.2
Intel
®
Table 5.
NetStructure
Spanning Tree Protocol (IEEE 802.1D)
The Spanning Tree Protocol (STP) prevents loops in a network by allowing only one active path
between any two network devices at a time. STP operates on two levels. The switch has a global
setting, which either enables all ports to participate in STP or prevents all ports from participating
in STP. When STP is globally enabled on the switch, STP can be enabled and disabled on
individual ports.
Forwarding Database (Layer 2 Address Table)
The Layer 2 MAC forwarding database contains at most 8 KByte of entries (over 8,000 addresses).
The default aging time for dynamically learned entries is 300 seconds. The value is user-
configurable; the range is 300 to 1,000,000 seconds. The switch has a minimum learning rate of 3K
MAC addresses per second.
When the switch discovers that a topology change has occurred, the STP aging time is decreased to
the “Forward Delay” time, which has a default value of 15 seconds. (The default STP aging time is
20 seconds.)
The forwarding database supports two types of static entries: static and black hole.
Path Cost Issue
When you enable STP and you do not configure a port cost for a port, the switch assigns a default
port cost based on the port’s current link speed.
Path Cost
For the master port of the group, the path cost is the assigned value minus the number of ports in
the group. However, if you configure the path cost for the master port, the configured value will be
used instead.
•
•
TM
Black Hole: If a black-hole entry is added for a specified MAC address, the switch discards all
frames with the specified MAC address in the source or destination field.
Static: If a static entry is added for a MAC address, the switch forwards all frames with this
MAC address to a specified port.
ZT 8101 10/100 Ethernet Switch Technical Product Specification
Link Speed
1000 Mbps
100 Mbps
10 Mbps
Default Cost
100
19
4
1-65535
1-65535
1-65535
Range
Layer 2 Switch Features
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