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An example is presented below:
In this case, 4 IP interfaces are required, so a CIDR notation of 10.32.0.0/10 (or a 10-bit) addressing scheme will work. This
addressing scheme will give a subnet mask of 11111111.11000000.00000000.00000000 (binary) or 255.192.0.0 (decimal).
Using a 10.xxx.xxx.xxx IP address notation, the above example would give 4 network addresses and 4 subnets.
Any IP address from the allowed range of IP addresses for each subnet can be chosen as an IP address for an IP interface on
the switch.
For this example, we have chosen the next IP address above the network address:
The 4 IP interfaces, each with an IP address (listed in the table above), and a subnet mask of 255.192.0.0 can be entered
into the Setup IP Interface menu.
Spanning Tree Protocol
The IEEE 802.1D Spanning Tree Protocol allows for the blocking of links between switches that form loops within the
network. When multiple links between switches are detected, a primary link is established. Duplicated links are blocked
from use and become standby links. The protocol allows for the duplicate links to be used in the event of a failure of the
primary link. Once the Spanning Tree Protocol is configured and enabled, primary links are established and duplicated
links are blocked automatically. The reactivation of the blocked links (at the time of a primary link failure) is also
accomplished automatically – without operator intervention.
This automatic network reconfiguration provides maximum uptime to network users. However, the concepts of the
Spanning Tree Algorithm and protocol are a complicated and complex subject and must be fully researched and
understood. It is possible to cause serious degradation of the performance of the network if the Spanning Tree is incorrectly
configured. Please read the following before making any changes from the default values.
The DGS-3308 STP allows two levels of spanning trees to be configured. The first level constructs a spanning tree on the
links between switches. This is referred to as the Switch or Global level. The second level is on a port group basis.
Groups of ports are configured as being members of a spanning tree and the algorithm and protocol are applied to the
group of ports. This is referred to as the Port or VLAN level.
VLAN Name
System (default)
Engineering
Marketing
Shipping
Table 5-5. VLAN Example – Assigned Ports
VLAN Name
VID
System (default)
1
Engineering
2
Marketing
3
Shipping
4
Table 5-6. VLAN Example – Assigned IP Addresses
VID
Switch Ports
1
2
3
4
Network Address
10.0.0.0
10.64.0.0
10.128.0.0
10.192.0.0
28
8-port Gigabit Ethernet Switch User's Guide
7, 8
1, 2
5, 6
3,4
IP Address
10.0.0.1
10.64.0.1
10.128.0.1
10.192.0.1
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Troubleshooting
