253
Step Command
Remarks
9.
Configure the IPsec SA
lifetime.
sa
duration
{
time-based
seconds
|
traffic-based
kilobytes
}
By default, the global SA lifetime
settings are used.
10.
(Optional.) Set the IPsec SA
idle timeout.
sa idle-time
seconds
By default, the global SA idle
timeout is used.
11.
Return to system view.
quit
N/A
12.
Configure the global SA
lifetime.
ipsec
sa
global-duration
{
time-based
seconds
|
traffic-based
kilobytes
}
By default, time-based SA lifetime
is 3600 seconds, and traffic-based
SA lifetime is 1843200 kilobytes.
13.
(Optional.) Enable the global
IPsec SA idle timeout function,
and set the global SA idle
timeout.
ipsec sa idle-time
seconds
By default, the global IPsec SA idle
timeout function is disabled.
14.
Create an IPsec policy by
referencing the IPsec policy
template.
ipsec
{
ipv6-policy
|
policy
}
policy-name seq-number
isakmp
template
template-name
By default, no IPsec policy exists.
Applying an IPsec policy to an interface
You can apply an IPsec policy to an interface to protect certain data flows. To cancel the IPsec protection,
remove the application of the IPsec policy. In addition to VLAN interfaces, you can apply an IPsec policy
to tunnel interfaces to protect GRE flows.
For each packet to be sent out of an interface applied with an IPsec policy, the interface looks through the
IPsec policy entries in the IPsec policy in ascending order of sequence numbers. If the packet matches the
ACL of an IPsec policy entry, the interface uses the IPsec policy entry to protect the packet. If no match is
found, the interface sends the packet out without IPsec protection.
When the interface receives an IPsec packet whose destination address is the IP address of the local
device, it searches for the inbound IPsec SA according to the SPI carried in the IPsec packet header for
de-encapsulation. If the de-encapsulated packet matches the permit rule of the ACL, the device processes
the packet. Otherwise, it drops the packet.
An interface can reference only one IPsec policy. An IKE-based IPsec policy can be applied to more than
one interface, but a manual IPsec policy can be applied to only one interface.
To apply an IPsec policy to an interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A