ECS4100 Series Web Management Guide-R07

Chapter 1 | Introduction
Description of Software Features
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Port Trunking Ports can be combined into an aggregate connection. Trunks can be manually set
up or dynamically configured using Link Aggregation Control Protocol (LACP – IEEE
802.3-2005). 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 switch supports up to 12 trunks.
Storm Control Broadcast, multicast and unknown unicast storm suppression prevents traffic from
overwhelming the network.When enabled on a port, the level of traffic passing
through the port is restricted. If traffic rises above a pre-defined threshold, it will be
throttled until the level falls back beneath the threshold.
Static MAC Addresses A static address can be assigned to a specific interface on this switch. Static
addresses are bound to the assigned interface and will not be moved. When a static
address is seen on another interface, the 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.
IP Address Filtering Access to insecure ports can be controlled using DHCP Snooping which filters
ingress traffic based on static IP addresses and addresses stored in the DHCP
Snooping table. Traffic can also be restricted to specific source IP addresses or
source IP/MAC address pairs based on static entries or entries stored in the DHCP
Snooping table.
IEEE 802.1D Bridge The 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 switch copies each frame into its memory 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). This prevents bad
frames from entering the network and wasting bandwidth.
To avoid dropping frames on congested ports, the switch provides 4 Mbits for
frame buffering. This buffer can queue packets awaiting transmission on congested
networks.
Spanning Tree
Algorithm
The switch supports these 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 network. This prevents the