H3C MSR Series Command Reference

536
Related commands
display ipsec ipv6-policy
display ipsec policy
ikev2 profile
ipsec anti-replay check
Use ipsec anti-replay check to enable IPsec anti-replay checking.
Use undo ipsec anti-replay check to disable IPsec anti-replay checking.
Syntax
ipsec anti-replay check
undo ipsec anti-replay check
Default
IPsec anti-replay checking is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
IPsec packet de-encapsulation involves complicated calculation. De-encapsulation of replayed
packets is not necessary but consumes large amounts of resources and degrades performance,
resulting in DoS. IPsec anti-replay checking, when enabled, is performed before the
de-encapsulation process, reducing resource waste.
In some situations, service data packets are received in a different order than their original order. The
IPsec anti-replay feature drops them as replayed packets, which impacts communications. If this
happens, disable IPsec anti-replay checking or adjust the size of the anti-replay window as required.
Only IPsec SAs negotiated by IKE support anti-replay checking. Manually created IPsec SAs do not
support anti-replay checking. Enabling or disabling IPsec anti-replay checking does not affect
manually created IPsec SAs.
Examples
# Enable IPsec anti-replay checking.
<Sysname> system-view
[Sysname] ipsec anti-replay check
Related commands
ipsec anti-replay window
ipsec anti-replay window
Use ipsec anti-replay window to set the anti-replay window size.
Use undo ipsec anti-replay window to restore the default.
Syntax
ipsec anti-replay window width
undo ipsec anti-replay window

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