EDS-508A/505A Series User’s Manual
Featured Functions
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Using Bandwidth Management
In general, one host should not be allowed to occupy unlimited bandwidth, particularly when the
device malfunctions. For example, so-called “broadcast storms” could be caused by an incorrectly
configured topology, or a malfunctioning device. The EDS not only prevents broadcast storms, but
can also be configured to a different ingress rate for all packets, giving administrators full control
of their limited bandwidth to prevent undesirable effects caused by unpredictable faults.
Configuring Bandwidth Management
Traffic Rate Limiting Settings
Ingress
Setting
Description
Factory Default
Ingress rate
Select the ingress rate for all packets from the following
options: not limited, 128K, 256K, 512K, 1M, 2M, 4M,
8M
N/A
Using Port Access Control
The EDS provides two kinds of Port-Based Access Controls. One is Static Port Lock and the other
is IEEE 802.1X.
Static Port Lock
The EDS can also be configured to protect static MAC addresses for a specific port. With the Port
Lock function, these locked ports will not learn any additional addresses, but only allow traffic
from preset static MAC addresses, helping to block crackers and careless usage.
IEEE 802.1X
The IEEE 802.1X standard defines a protocol for client/server-based access control and
authentication. The protocol restricts unauthorized clients from connecting to a LAN through ports
that are open to the Internet, and which otherwise would be readily accessible. The purpose of the
authentication server is to check each client that requests access to the port. The client is only
allowed access to the port if the client’s permission is authenticated.
