Black Box LR1102A-T1/E1 - Manual (Page 103)

Configuring GRE Site to Site with
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Step 5: Configure the Cisco side:
18.4 Configuring GRE Site to Site with IPSec
This example extends the first example by adding encryption to the tunnel.
Step 1:Prepare the WAN link:
Step 2: Configure the tunnel:
Step 3: Configure the routes:
Step 4: Define the policy:
cisco > config t
cisco(config)#interface Ethernet2/0
cisco(config-if)#ip address 192.168.55.75255.255.255.0
cisco(config-if)#exit
cisco(config)#interface Tunnel 0
cisco(config-if)#ip address 103.1.1.1 255.255.255.0
cisco(config-if)#tunnel source 192.168.55.75
cisco(config-if)#tunnel destination 192.168.94.220
cisco(config-if)#exit
cisco(config)#ip route 0.0.0.0 0.0.0.0 192.168.55.254
cisco(config)#ip route 10.3.1.0 255.255.255.0 Tunnel0
Blackbox> configure terminal
Blackbox/ configure> interface bundle wan1
Blackbox/ configure/interface/bundle wan1> link t1 1
Blackbox/ configure/interface/bundle wan1> encapsulation ppp
Blackbox/ configure/interface/bundle wan1> ip address 192.168.94.220 255.255.255.0
Blackbox/ configure/interface/bundle wan1> crypto untrusted
Blackbox/ configure/interface/bundle wan1> exit
Blackbox/ configure> interface tunnel t0
Blackbox/ configure/interface/tunnel t0> ip address 103.1.1.2 24
Blackbox/ configure/interface/tunnel t0> tunnel source 192.168.94.220
Blackbox/ configure/interface/tunnel t0> tunnel destination 192.168.55.75
Blackbox/ configure/interface/tunnel t0> tunnel protection grecisco secretkeyfortest
Blackbox/ configure/interface/tunnel t0> crypto untrusted
Blackbox/ configure/interface/tunnel t0> exit
Blackbox/ configure> ip route 0.0.0.0 0.0.0.0 192.168.94.254
Blackbox/ configure> ip route 40.1.1.0 24 t0