275
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IPsec policy view or
IPsec policy template view.
•
To enter IPsec policy view:
ipsec
{
policy
|
ipv6-policy
}
policy-name
seq-number
[
isakmp
|
manual
]
•
To enter IPsec policy
template view:
ipsec
{
policy-template
|
ipv6-policy-template
}
template-name
seq-number
N/A
3.
Enable QoS pre-classify.
qos pre-classify
By default, QoS pre-classify is
disabled.
Enabling logging of IPsec packets
Perform this task to enable the logging of IPsec packets that are discarded because of reasons such
as IPsec SA lookup failure, AH-ESP authentication failure, and ESP encryption failure. The log
information includes the source and destination IP addresses, the SPI value, and the sequence
number of a discarded IPsec packet, and the reason for the failure.
To enable the logging of IPsec packets:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enable the logging of IPsec
packets.
ipsec logging packet enable
By default, the logging of IPsec
packets is disabled.
Configuring the DF bit of IPsec packets
Perform this task to configure the Don't Fragment (DF) bit in the new IP header of IPsec packets in
one of the following ways:
•
clear
—Clears the DF bit in the new header.
•
set
—Sets the DF bit in the new header.
•
copy
—Copies the DF bit in the original IP header to the new IP header.
You can configure the DF bit in system view and interface view. The interface-view DF bit setting
takes precedence over the system-view DF bit setting. If the interface-view DF bit setting is not
configured, the interface uses the system-view DF bit setting.
Follow these guidelines when you configure the DF bit:
•
The DF bit setting takes effect only in tunnel mode, and it changes the DF bit in the new IP
header rather than the original IP header.
•
Configure the same DF bit setting on the interfaces where the same IPsec policy bound to a
source interface has been applied.
To configure the DF bit of IPsec packets on an interface:
Step Command Remarks
1.
Enter system view.
system-view
N/A
