Chapter 27: Configuring Gre; Installing Licenses - Avaya 1000 Series Configuration Manual

Chapter 27: Configuring GRE

Generic Routing Encapsulation (GRE) is a standards-based (RFC1701, RFC2784) tunneling protocol that
can encapsulate a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-
point link between routers at remote points over an IP network. A tunnel is a logical interface that provides a
way to encapsulate passenger packets inside a transport protocol. By connecting multiprotocol
subnetworks in a single-protocol backbone environment, IP tunneling using GRE allows network
expansion across a single-protocol backbone environment.
IPSec and GRE complement each other well, while IPSec provides a secure method of transporting data
across the Internet GRE provides the capability to transport routing protocols (for example: OSPF) that
use broadcast and multicast.
GRE tunnel can now be configured over the Ethernet that supports 1500 bytes of user data without having
to fragment the packet over the tunnel.

Installing Licenses

Licenses control access to:
Example
• Basic VPN Management (vpn_mgmt) — allows users to manage a remote Secure
Router.
• Advanced VPN (advance_vpn) — allows users to manage remote LANs.
To see the licenses available in this release, enter:
/configure> system licenses ?
NAME
licenses - Configure feature upgrade licenses
SYNTAX
licenses license_type <cr>
DESCRIPTION
license_type
The parameter may have any of the following values:
vpn_mgmt
advance_vpn
To install the advanced VPN license and use all the security features available in this release,
enter:
Avaya Secure Router 1000 Series Configuration Guide
-- Specifies the type of feature upgrade license
-- Enable VPN Mgmt License
-- Enable Advance VPN
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