LevelOne GTL-2691 - Manual (Page 74)

C HAPTER 1 | Introduction
Description of Software Features
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R ATE L IMITING
This feature controls the maximum rate for traffic transmitted or received
on an interface. Rate limiting is configured on interfaces at the edge of a
network to limit traffic into or out of the network. Packets that exceed the
acceptable amount of traffic are dropped.
P ORT M IRRORING
The switch can unobtrusively mirror traffic from any port to a monitor port.
You can then attach a protocol analyzer or RMON probe to this port to
perform traffic analysis and verify connection integrity.
P ORT T RUNKING
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 13/25 trunks per switch or 32 per stack.
S TORM C ONTROL
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.
S TATIC MAC
A DDRESSES
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 A DDRESS
F ILTERING
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 B RIDGE
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.
S TORE - AND -F ORWARD
S WITCHING
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).