Cisco Catalyst 3750-E User Manual

30-4
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 30 Configuring SPAN and RSPAN
Understanding SPAN and RSPAN
Figure 30-3 Example of RSPAN Configuration
SPAN and RSPAN Concepts and Terminology
• SPAN Sessions, page 30-4
• Monitored Traffic, page 30-6
• Source Ports, page 30-7
• Source VLANs, page 30-7
• VLAN Filtering, page 30-8
• Destination Port, page 30-8
• RSPAN VLAN, page 30-9
SPAN Sessions
SPAN sessions (local or remote) allow you to monitor traffic on one or more ports, or one or more
VLANs, and send the monitored traffic to one or more destination ports.
A local SPAN session is an association of a destinat
ion port with source ports or source VLANs, all on
a single network device. Local SPAN does not have separate source and destination sessions. Local
SPAN sessions gather a set of ingress and egress packets specified by the user and form them into a
stream of SPAN data, which is directed to the destination port.
RSPAN
VLAN
RSPAN
source ports
RSPAN
source ports
RSPAN
destination ports
RSPAN
source
session B
Intermediate switches
must support RSPAN VLAN
Switch B
RSPAN
destination
session
Switch C
RSPAN
source
session A
Switch A
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Cisco Catalyst 3750-E Specifications

General

Series	Catalyst 3750-E
Switching Capacity	32 Gbps
Stacking Bandwidth	32 Gbps
StackWise Plus	Yes
Layer Support	Layer 3
MAC Address Table Size	12, 000 entries
RAM	256 MB
Flash Memory	64 MB
Memory	256 MB DRAM, 64 MB Flash
Operating Temperature	32 to 113°F (0 to 45°C)
Ports	48 10/100/1000 Ethernet ports
Form Factor	Rack-mountable
Jumbo Frame Support	Yes
Input Voltage	100 to 240 VAC
Storage Temperature	-25 to 70 °C
Relative Humidity	10 to 90% non-condensing