ZT8101 Intel (CPU), ZT8101 Datasheet - Page 17

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

Specifications of ZT8101

• Lead Free Status / RoHS Status: Supplier Unconfirmed

4.3
4.3.1
4.4
Intel
®
NetStructure
Filtering
A filtering database is used to segment the network and control communication between segments.
It can also filter packets off the network for intrusion control.
Each port on the switch is a unique collision domain, and the switch filters (discards) packets
whose destination lies on the same port as where it originated. This keeps local packets from
disrupting communications on other parts of the network.
The switch does some filtering automatically:
You can also manually configure the switch to drop packets from specified IP addresses.
IP Address Filtering
When filtering by IP address, you have three options. You can have the switch drop the packet
based on whether the IP address appears:
The table can contain 32 entries, and two table entries are needed to configure a bi-directional
filter.
Forwarding
The switch maintains a forwarding table. This table contains the relationship between destination
MAC or IP addresses and the Ethernet port or gateway router the destination resides on. This
information is then used to forward packets. This reduces the traffic congestion on the network,
because packets, instead of being transmitted to all ports, are transmitted to the destination port
only. For example, if Port 1 receives a packet destined for a station on Port 2, the switch transmits
that packet through Port 2 only, and transmits nothing through the other ports. This process is
referred to as “learning” the network topology.
You can configure forwarding rules for the following:
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Dynamic filtering - The switch automatically learns and ages MAC addresses and their
location on the network. Filtering occurs to keep local traffic confined to its segment.
Filtering done by the Spanning Tree Protocol - STP filters packets based on topology, making
sure that signal loops don't occur.
Filtering done for VLAN integrity - The switch filters packets from a member of a VLAN
(VLAN 2, for example) destined for a device on another VLAN (VLAN 3).
as the source
as the destination
in either the source or destination
MAC address aging
MAC address forwarding
IP address to a specified gateway
IP address to a specified MAC address
ZT 8101 10/100 Ethernet Switch Technical Product Specification
Layer 2 Switch Features
17