Layer 2+ Features - Fujitsu PRIMERGY BX900 User Manual

2.1.2

Layer 2+ Features

IGMP Snooping/MLD Snooping
IGMP Snooping examines IGMP frame contents, when they are forwarded by the Ethernet Connection
Blade Module from work stations to an upstream Multicast router. From the frame, the Ethernet
Connection Blade Module identifies work stations configured for Multicast sessions, and which Multicast
routers are sending Multicast frames.
Port Mirroring
The mirror port mirrors both transmitted and received packets of the probe ports. In Ethernet Connection
Blade Module, it supports multiple probe ports and one mirror port. The mirror port mirrors packets of all
probe ports no matter whether these packets will eventually be dropped or not. User could set the probe
ports and mirror port by using the switch management function. On setting the probe port and mirror
port, users have to make sure both ports are configured to the same speed so that all packets could be
successfully mirrored. Physical ports and port-channel ports can be the probe ports.
Broadcast Storm Control
Storm control enables limiting the amount of switching IP packets. Since high rates and continuous
traffic can cause flooding on the network. The Storm control mechanism is to prevent the packets from
flooding into other parts of the network. Broadcast, multicast, and uni-cast forwarding rates are
supported. It provides users four different forwarding rates, 64, 128, 256, 512 pps (packets per second),
for broadcast, multicast, and uni-cast frames. Any traffic exceeding the configured forwarding rate will be
discarded in Ethernet Connection Blade. This function is disabled in default configuration.
VLAN Supported Features
The Ethernet Connection Blade supports up to 1000 VLANs and up to 4094 VLAN IDs. 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 Ethernet Connection Blade 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 Ethernet Connection Blade to
restrict traffic to the VLAN groups to which a user has been assigned. By segmenting your network into
VLANs, user can:
a) Eliminate broadcast storms which severely degrade performance in a flat network.
b) Simplify network management for node changes/moves by remotely configuring VLAN membership
for any port rather than having to manually change the network connection.
c) Provide data security by restricting all traffic to the originating VLAN, except where a connection has
been configured between separate VLANs using a router or Layer 3 switch.
VLAN Support
VLANs are collections of switching ports that comprise a single broadcast domain. Packets are classified
as belonging to a VLAN based on either the VLAN tag or based on a combination of the ingress port and
packet contents. Packets sharing common attributes can be grouped in the same VLAN.
a) Port-based VLANs
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