Layer 2 Features - Cisco SFE2000 Release Notes

Release Notes for Cisco Small Business SFE2000 Series 24-port 10/100 Ethernet Switches
•
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.
•
VLAN-aware MAC-based Switching—The device always performs VLAN-
aware bridging. Classic bridging (IEEE802. 1 D) is not performed, where
frames are forwarded based only on their destination MAC address.
However, a similar functionality may be configured for untagged frames.
Frames addressed to a destination MAC address that are not associated
with any port are flooded to all ports of the relevant VLAN.
•
MAC/IP Address to Port View—Displays the MAC addresses and IP
addresses that are associated with a given port. For each port, it is possible
to display the MAC addresses and IP addresses that are associated with
that port. The information is based on information available in the ARP table,
but is presented differently.

Layer 2 Features

IGMP Snooping IGMP
Snooping examines IGMP frame contents when they are forwarded by the device
from work stations to an upstream Multicast router. From the frame, the device
identifies work stations configured for Multicast sessions and identifies 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.
Packet Broadcast Storm Control
Storm Control enables limiting the amount of Multicast and Broadcast frames
accepted and forwarded by the device. 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.
L2 Multicast Forwarding and Filtering
When a frame arrives on any switch port and its destination address is in an L2
multicast address, it is forwarded to all relevant ports – that is, ports that are
members of the relevant multicast group.
Release Notes
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