Ericsson ECN330, User Manual

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Management Features Overview
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1553-KDU 137 365 Uen D 2006-06-16
Port Trunking – Ports can be combined into an aggregate connection. Trunks
can be manually set up or dynamically configured using IEEE 802.3-2002
(formerly IEEE 802.3ad) Link Aggregation Control Protocol (LACP). The
additional ports dramatically increase the throughput across any connection,
and provide redundancy by taking over the load if a port in the trunk should fail.
The ECN330-switch supports up to 13 trunks.
Broadcast Storm Control – Broadcast suppression prevents broadcast traffic
from overwhelming the network. When enabled on a port, the level of broadcast
traffic passing through the port is restricted. If broadcast traffic rises above a pre-
defined threshold, it will be throttled until the level falls back beneath the
threshold.
Static Addresses – A static address can be assigned to a specific interface on
the ECN330-switch. Static addresses are bound to the assigned interfaces and
will not be moved. When a static address is seen on another interface, the static
address will be ignored and will not be written to the address table. Static
addresses can be used to provide network security by restricting access for a
known host to a specific port.
IEEE 802.1D Bridge – The ECN330-switch supports IEEE 802.1D transparent
bridging. The address table facilitates data switching by learning addresses, and
then filtering or forwarding traffic based on this information. The address table
supports up to 16K addresses.
Store-and-Forward Switching – The ECN330-switch evaluates in its memory
each frame before forwarding them to another port. This ensures that all frames
are a standard Ethernet size and have been verified for accuracy with the cyclic
redundancy check (CRC), thus preventing bad frames from entering the network
and wasting bandwidth.
To avoid dropping frames on congested ports, the ECN330-switch provides 1
MByte for frame buffering. This buffer can queue packets awaiting transmission
on congested networks.
Spanning Tree Algorithm – The ECN330-switch supports the following
spanning tree protocols:
• Spanning Tree Protocol (STP, IEEE 802.1D) – This protocol provides
loop detection. When there are multiple physical paths between
segments, this protocol will choose a single path and disable all others
to ensure that only one route exists between any two stations on the