Overview Of Ipsec Vpn Configuration - Avaya G250 Administration

Improving transmission efficiency
R3.0 offers two methods for improving transmission efficiency:
IPPCP (IP Payload Compression), which compresses the original IP packet prior to
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encryption. The supported compression is the industry standard LZS compression.
IPSEC VPN Transport mode, in which the G250/G350 does not add an additional IP
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header (i.e., a tunnel header), but rather uses the original packet's header. It is applicable
only when the VPN tunnel endpoints are equivalent to the original packet's source and
destination IP addresses. This is generally the case when using GRE over IPSec.
Enabling continuous channel
R3.0 offers the capability of keeping the VPN connection continuously alive, even if no traffic is
traversing the connection and the timeouts have expired. This offers advantages such as
immediate evaluation of a new VPN tunnel, and elimination of the waiting time necessary to
construct a new VPN connection following timeout expiration in an existing VPN tunnel.

Overview of IPSec VPN configuration

This section provides an overview of the VPN configuration process.
components you need to define and the order in which you need to define them.
describes the relationships among the various VPN components.
Introduction to IPSec VPN
Figure 38 summarizes the
Figure 39
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