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Default
ACL checking of de-encapsulated IPsec packets is enabled.
Views
System view
Default command level
2: System level
Examples
# Enable ACL checking of de-encapsulated IPsec packets.
<Sysname> system-view
[Sysname] ipsec decrypt check
ipsec fragmentation before-encryption
Use
ipsec
fragmentation before-encryption enable
to enable IPsec packet fragmentation before
encryption.
Use
undo
ipsec
fragmentation before-encryption enable
to enable IPsec packet fragmentation
after encryption.
Syntax
ipsec fragmentation
before-encryption enable
undo
ipsec fragmentation
before-encryption enable
Default
IPsec packet fragmentation before encryption is enabled.
Views
System view
Default command level
2: System level
Usage guidelines
If IPsec packet fragmentation before encryption is enabled, the following occurs when an
IPsec-protected interface encapsulates a packet:
•
If the packet size is less than the interface MTU, the interface directly encapsulates the packet.
•
If the packet size exceeds the interface MTU, the interface first fragments and then
encapsulates the packet.
•
If the packet size exceeds the interface MTU and the packet contains a DF bit, the interface
directly drops the packet and reports an ICMP message.
If IPsec packet fragmentation after encryption is enabled, an IPsec-protected interface first
encapsulates a packet, and then fragments the packet if the encapsulated packet size exceeds the
interface MTU.
On an interface applied with an IPsec GDOI policy, IPsec packet fragmentation before encryption
must be enabled. Otherwise, the remote interface cannot decrypt the packets whose size is larger
than the MTU of the remote interface.
Examples
# Enable IPsec packet fragmentation before encryption.
<Sysname> system-view