DELL N3000 User Manual

Switch Feature Overview

When Layer 2 frames are forwarded, broadcast, unknown unicast, and 

multicast frames are flooded to all ports on the relevant virtual local area 

network (VLAN). The flooding occupies bandwidth, and loads all nodes 

connected on all ports. Storm control limits the amount of broadcast, 

unknown unicast, and multicast frames accepted and forwarded by the 

switch.
For information about configuring Broadcast Storm Control settings, see 

Port mirroring monitors and mirrors network traffic by forwarding copies of 

incoming and outgoing packets from multiple source ports to a monitoring 

port. Source ports may be VLANs, physical interfaces, port-channels, or the 

CPU port. The switch also supports flow-based mirroring, which allows you to 

copy certain types of traffic to a single destination port. This provides 

flexibility—instead of mirroring all ingress or egress traffic on a port the 

switch can mirror a subset of that traffic. You can configure the switch to 

mirror flows based on certain kinds of Layer 2, Layer 3, and Layer 4 

information.
Dell Networking switches support RSPAN destinations where traffic can be 

tunneled across the operational network. RSPAN does not support 

configuration of the CPU port as a source.
For information about configuring port mirroring, see "Monitoring Switch 

Traffic" on page 407.

You can add static entries to the switch’s MAC address table and configure 

the aging time for entries in the dynamic MAC address table. You can also 

search for entries in the dynamic table based on several different criteria.
For information about viewing and managing the MAC address table, see 

"Managing the MAC Address Table" on page 1015.