H3C MSR Series Command Reference

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Usage guidelines
The global ICMP flood attack detection applies to all IP addresses except for those specified by the
icmp-flood detect ip command. The global detection uses the global trigger threshold set by the
icmp-flood threshold command and global actions specified by the icmp-flood action command.
Examples
# Enable global ICMP flood attack detection in the attack defense policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1
[Sysname-attack-defense-policy-atk-policy-1] icmp-flood detect non-specific
Related commands
icmp-flood action
icmp-flood detect ip
icmp-flood threshold
icmp-flood threshold
Use icmp-flood threshold to set the global threshold for triggering ICMP flood attack prevention.
Use undo icmp-flood threshold to restore the default.
Syntax
icmp-flood threshold threshold-value
undo icmp-flood threshold
Default
The global threshold is 1000 for triggering ICMP flood attack prevention.
Views
Attack defense policy view
Predefined user roles
network-admin
Parameters
threshold-value: Specifies the threshold value. The value range is 1 to 1000000 in units of ICMP
packets sent to an IP address per second.
Usage guidelines
The global threshold applies to global ICMP flood attack detection. Adjust the threshold according to
the application scenarios. If the number of ICMP packets sent to a protected server, such as an
HTTP or FTP server, is normally large, set a large threshold. A small threshold might affect the server
services. For a network that is unstable or susceptible to attacks, set a small threshold.
With global ICMP flood attack detection configured, the device is in attack detection state. When the
sending rate of ICMP packets to an IP address reaches the threshold, the device enters prevention
state and takes the specified actions. When the rate is below the silence threshold (three-fourths of
the threshold), the device returns to the attack detection state.
Examples
# Set the global threshold to 100 for triggering ICMP flood attack prevention in the attack defense
policy atk-policy-1.
<Sysname> system-view
[Sysname] attack-defense policy atk-policy-1

H3C MSR Series Specifications

General

Category	Network Router
IPv6 Support	Yes
Dimensions	Varies by model
Weight	Varies by model
Product Type	Modular Router
Ports	Varies by model
WAN Interfaces	Varies by model
Firewall	Yes
QoS	Yes
Wireless Support	Varies by model
USB Ports	Varies by model
Console Port	Yes
Power Supply	Varies by model
Redundancy	Varies by model
Operating Temperature	0°C to 45°C
Storage Temperature	-40°C to 70°C
Humidity	5% to 95% non-condensing
Series	MSR
Certifications	CE, FCC, RoHS