GRE over IPsec Scenario

Example for Configuring GRE over IPsec

GRE over IPsec is a technology for encrypting and encapsulating packets that cannot be encrypted or encapsulated by IPsec, such as multicast and broadcast packets. IPsec is used for encrypting and encapsulating IP packets only.

Example for Configuring GRE over IPsec (with the Source Interface Address of a GRE Tunnel the Same as the Source IP Address of an IPsec Tunnel)

In GRE over IPsec networking, using the same the source IP address for the GRE tunnel and the IPsec tunnel helps save IP address resources.

Example for Configuring Inter-Board IPv6 over GRE over IPsec

IPsec applies only to IPv4 unicast packets. To cover IPv6 unicast, IPv4 multicast, IPv4 broadcast, and L2VPN/L3VPN IPv4 packets, configure IPv6 over GRE over IPsec.

Example for Configuring Inter-Board BGP over GRE over IPsec

Example for Configuring Inter-Board LDP over GRE over IPsec