Cisco Catalyst 3750-X Command Reference

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Catalyst 3750-X and 3560-X Switch Command Reference
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Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
psp
psp
To control the rate at which protocol packets are sent to the switch, use the psp global configuration
command to specify the upper threshold for the packet flow rate. The supported protocols are Address
Resolution Protocol (ARP), ARP snooping, Dynamic Host Configuration Protocol (DHCP) v4, DHCP
snooping, Internet Group Management Protocol (IGMP), and IGMP snooping. To disable protocol storm
protection, use the no version of the command.
psp {arp | dhcp | igmp} pps value
no psp {arp | dhcp | igmp}
Syntax Description
Defaults Protocol storm protection is disabled by default.
Command Modes Global configuration
Command History
Usage Guidelines To set error-disable detection protocol storm protection, use the errdisable detect cause psp global
configuration command.
When protocol storm protection is configured, a counter records the number of dropped packets. To see
the number of dropped packets for a specific protocol, use the show psp statistics {arp | dhcp | igmp}
privileged EXEC command. To see the number of dropped packets for all protocols, use the show psp
statistics all command. To clear the counter for a protocol, use the clear psp counter [arp | dhcp | igmp]
command.
Related Commands
arp Set protocol packet flow rate for ARP and ARP snooping.
dhcp Set protocol packet flow rate for DHCP and DHCP snooping.
igmp Set protocol packet flow rate for IGMP and IGMP snooping.
pps value Specify the threshold value for the number of packets per second. If the
traffic exceeds this value, protocol storm protection is enforced. The range is
from 5 to 50 packets per second.
Release Modification
12.2(58)SE This command was introduced.
Command Description
show psp config Displays the protocol storm protection configuration.
show psp statistics Displays the number of dropped packets.
clear psp counter Clears the counter of dropped packets.
errdisable detect cause psp Enables error-disable detection for protocol storm
protection.

Cisco Catalyst 3750-X Specifications

General

Brand	Cisco
Model	Catalyst 3750-X
Category	Switch
Language	English