R3303-HP HSR6800 Routers Security Configuration Guide

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Task Remarks
Configuring an IPsec transform set
Required.
An IPsec transform set for the IPsec
tunnel interface to reference
supports tunnel mode only.
Configuring an IPsec profile Required.
Configuring an IPsec tunnel interface Required.
Enabling packet information pre-extraction on the IPsec tunnel interface Optional.
Applying a QoS policy to an IPsec tunnel interface Optional.
Enabling the encryption engine Optional.
Configuring the IPsec anti-replay function Optional.
Configuring an IPsec profile
An IPsec policy is uniquely identified by its name and sequence number. An IPsec policy group is a
collection of IPsec policies with the same name but different sequence numbers. In an IPsec policy group,
an IPsec policy with a smaller sequence number has a higher priority. After an IPsec policy group is
applied to an interface, for each packet arriving at the interface, the system checks the IPsec policies of
the IPsec policy group in the ascending order of sequence numbers. One IPsec tunnel will be established
for each data flow to be protected, and multiple IPsec tunnels might exist on an interface.
An IPsec profile is similar to an IPsec policy. The difference is that an IPsec profile is uniquely identified
by its name and it does not support ACL configuration. An IPsec profile defines the IPsec transform set to
be used for protecting data flows, and specifies the parameters for IKE negotiation. After an IPsec profile
is applied to an IPsec tunnel interface, only one IPsec tunnel is set up to protect all data flows that are
routed to the tunnel.
IPsec profiles can be applied to only DVPN interfaces and IPsec tunnel interfaces. The IPsec tunnel
established using an IPsec profile protects all IP data routed to the tunnel interface.
Before configuring an IPsec profile, complete the following tasks:
• Configure the IPsec transform set for the IPsec profile to reference. For more information, see
"Configuring an IPsec profile."
• C
onfigure the IKE peer. For more information, see "Configuring IKE."
The parameters for the local and remote ends must match.
During an IKE negotiation based on an IPsec profile, the source and destination addresses of the IPsec
tunnel interface are used as the local and remote addresses. The local-address and remote-address
commands configured for IKE negotiation do not take effect.
If you do not configure the destination address of the IPsec tunnel interface, the local peer can only be
an IKE negotiation responder; it cannot initiate an IKE negotiation.
DVPN is a technology when VPN is established between enterprise branches that use dynamic
addresses to access the public network. For more information about DVPN tunnel interface, see Layer
3—IP Services Configuration Guide.
To configure an IPsec profile: