Cisco Systems 3560 Manual De Usuario

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24-6
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 24      Configuring Port-Based Traffic Control
Configuring Protected Ports
This example shows how to enable the small-frame arrival-rate feature, configure the port recovery time, 
and configure the threshold for error disabling a port:
Switch# configure terminal
Switch# errdisable detect cause small-frame
Switch# errdisable recovery cause small-frame
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# small-frame violation rate 10000
Switch(config-if)# end
Configuring Protected Ports
Some applications require that no traffic be forwarded at Layer 2 between ports on the same switch so 
that one neighbor does not see the traffic generated by another neighbor. In such an environment, the 
use of protected ports ensures that there is no exchange of unicast, broadcast, or multicast traffic between 
these ports on the switch.
Protected ports have these features:
  •
A protected port does not forward any traffic (unicast, multicast, or broadcast) to any other port that 
is also a protected port. Data traffic cannot be forwarded between protected ports at Layer 2; only 
control traffic, such as PIM packets, is forwarded because these packets are processed by the CPU 
and forwarded in software. All data traffic passing between protected ports must be forwarded 
through a Layer 3 device.
  •
Forwarding behavior between a protected port and a nonprotected port proceeds as usual.
These sections contain this configuration information:
  •
  •
  •
Default Protected Port Configuration
The default is to have no protected ports defined.
Step 5
interface interface-id
Enter interface configuration mode, and specify the interface to be 
configured.
Step 6
small violation-rate pps
Configure the threshold rate for the interface to drop incoming 
packets and error disable the port. The range is 1 to 10,000 packets 
per second (pps)
Step 7
end
Return to privileged EXEC mode.
Step 8
show interfaces interface-id
Verify the configuration.
Step 9
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose