An IPsec policy defines a combination of security parameters (IPsec proposals) used during IPsec negotiation. During the IPsec negotiation, IPsec looks for an IPsec proposal that is the same on both peers. The peer that initiates the negotiation sends all its policies to the remote peer, and the remote peer tries to find a match.
A match is made when both policies from the two peers have a proposal that contains the same configured attributes. If the lifetimes are not identical, the shorter lifetime between the two policies (from the host and peer) is used.
To configure an IPsec policy:
Table 33: Configuring IPsec Policy