Layer 2 Features - Fujitsu Siemens Computers PRIMERGY BX Description

Features of the Switch Introduction
Automatic Aging for MAC Addresses
MAC addresses from which no traffic is received for a given period are aged out. This prevents
the Bridging Table from overflowing.
Port Security
Port security prevents unauthorized users from accessing your network. It allows each port to
learn, or be assigned, a list of MAC addresses for devices authorized to access the network
through that port. Any packet received on the port must have a source address that appears in
the authorized list, otherwise it will be dropped. Port security is disabled on all ports by default,
but can be enabled on a per-port basis.
Address Filtering –
This switch provides a packet filter for all traffic entering the CPU port and hence potentially
forwarded or routed to the management network. The packet filter is rule/pattern based and
constitutes a set of patterns which when matched will DROP the packet, and a further set of
patterns which when matched will ACCEPT the packet.
MAC Multicast Support
Multicast service is a limited broadcast service, which allows one-to-many and many-to-many
connections for information distribution. Layer 2 Multicast service is where a single frame is
addressed to a specific Multicast address, from where copies of the frame are transmitted to
the relevant ports.

2.1.2 Layer 2 Features

IGMP Snooping
IGMP Snooping examines IGMP frame contents, when they are forwarded by the Ethernet
Switch Module from work stations to an upstream Multicast router. From the frame, the
Ethernet Switch Module identifies work stations configured for Multicast sessions, and which
Multicast routers are sending Multicast frames.
Port Mirroring
Port mirroring monitors and mirrors network traffic by forwarding copies of incoming and
outgoing packets from a monitored port to a monitoring port. Users specify which target port
receives copies of all traffic passing through a specified source port.
Broadcast Storm Control
Storm Control enables limiting the amount of Multicast and Broadcast frames accepted and
forwarded by the Ethernet Switch Module. When Layer 2 frames are forwarded, Broadcast and
Multicast frames are flooded to all ports on the relevant VLAN. This occupies bandwidth, and
loads all nodes connected on all ports.
VLAN Supported Features
The switch supports up to 228 VLANs. A Virtual LAN is a collection of network nodes that share
the same collision domain regardless of their physical location or connection point in the
network. The switch supports tagged VLANs based on the IEEE 802.1Q standard. Members of
VLAN groups can be dynamically learned via GVRP, or ports can be manually assigned to a
specific set of VLANs. This allows the switch to restrict traffic to the VLAN groups to which a
user has been assigned. By segmenting your network into VLANs, you can:
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Lan Switch and Router Blade