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114 Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual
Using the Web Console
3. Configure these fields.
4. Click
Apply.
The Status field displays whether the port is Disabled or Forwarding. The STP Name field
displays the assigned STP group name for the port.
Forwarding
Forwarding reduces traffic congestion on the network because packets are transmitted only to the
destination port rather than to all ports. The switch maintains a number of static forwarding tables
which you can manually configure for MAC, IP, and ARP forwarding.
This section explains how to configure
• MAC address aging
• MAC forwarding (unicast MAC address, multicast MAC address, and storm control)
• IP forwarding (static and default routes, static ARP)
To configure MAC address aging
A very long MAC address aging time can result in out-of-date dynamic entries that may cause
incorrect packet filtering and forwarding decisions. A very short aging time may cause entries to be
aged out too soon, which results in a high percentage of received packets whose source addresses
cannot be found in the address table. In this case, the switch must broadcast the packet to all ports,
negating many of the benefits of having a switch.
1. In the left panel, select
Forwarding.
2. In the top panel under MAC Forwarding, select
MAC Address Aging Time.
3. In the MAC Address Aging Time field, specify the length of time a learned MAC address can
remain in the forwarding table without being accessed (that is, how long a learned MAC
Address is allowed to remain idle). The aging time can be set to any value between 300—
1,000,000 seconds. The default is 300 seconds (5 minutes).
4. Click Apply.
To configure unicast MAC address forwarding
1. In the left panel, click Forwarding.
1. In the top panel under MAC Forwarding, click
Unicast MAC Address Settings.
Field Description
Cost
Specifies the port cost. It can be set between 1—65535. The lower the cost,
the greater the probability the port will be chosen as the designated port
(chosen to forward packets). The default value for the 10/100 ports is 19,
and for the 100/1000 ports it is 4.
Priority
Specifies the port priority. It can be set between 0—255. The default is 128.
The lower the priority, the greater the probability the port will be chosen as
the root port. If two ports have the same priority, the port with the lowest port
number is selected. For example, STP chooses port 1 over port 5 if they
both have the same priority.
State Enables or disables STP on the specified port or range of ports.