ZT8101 Intel (CPU), ZT8101 Datasheet - Page 18

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

Specifications of ZT8101

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Layer 2 Switch Features
4.5
4.6
4.7
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Broadcast and Multicast Storm Control
You can specify thresholds for broadcast or multicast traffic that will activate storm control. When
the threshold is exceeded, the switch drops the broadcast or multicast traffic. When traffic levels
drop below the threshold, the switch resumes forwarding the traffic again.
The thresholds are applied to all Ethernet ports and cannot be set for individual ports. The threshold
specifies in thousands, the number of broadcast or multicast packets per second a port can receive
before triggering a storm control response. The possible range is from 0 K to 255 K packets per
second. This threshold can be configured to apply to broadcast packets, to multicast packets, or to
both.
Link Aggregation
Link aggregation allows several ports to be grouped together so that they can act as a single port.
This is done to either increase the bandwidth of a network connection or to increase fault tolerance.
The group has the following assignments:
When a link aggregation group is deleted or disabled, the ports retain their reassigned port settings.
They do not recover their original port settings. For example, suppose that Port 1 belongs to
VLAN1 and Port 2 belongs to VLAN2. When you create a group with a starting point of Port 1 and
a width of 2, Port 2 will be added to VLAN1 and removed from VLAN2 automatically. If you
delete or disable the group later, the Port 2 will still be assigned to VLAN1.
Remember the following guidelines when creating a link aggregation group:
Class of Service Support (CoS)
MAC address priority is a Layer 2 Class of Service. It allows certain frames, based on their MAC
address, to receive special handling. The following sections explain how this is done.
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Master port: This port is the Ethernet port with the lowest port number. All member ports are
configured to use its port settings and become members of its VLAN.
Anchor port: This port is in charge of sending control packets, such as spanning tree BPDUs,
and the flooding of multicast frames. When a link change event occurs in the group, the anchor
port may be re-elected.
Up to six groups can be established.
A group can contain up to eight ports.
Member ports of a group should always be the same speed and configured in full duplex mode.
You cannot create a group that includes 10/100 Ethernet ports and 100/1000 Ethernet ports.
STP will use the port parameters of the master port in the calculation of port cost and in
determining the state of the link aggregation group. The following formula is used to calculate
the path cost—group path cost = (path cost of master port) minus (number of ports in the
group).
Intel
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NetStructure
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ZT 8101 10/100 Ethernet Switch Technical Product Specification