VPN

GRE Tunnel

Configuration

Router(config)# interface tunnel0
Router(config-if)# ip address x.x.x.x x.x.x.x
Router(config-if)# tunnel source x.x.x.x
Router(config-if)# tunnel destination x.x.x.x
Router(config-if)# tunnel mode gre ip

DMVPN

Configuration

Router(config-if)# ip nhrp map 192.168.246.4 10.0.24.4

Show Command

Router# show dmvpn

Router# show ip nhrp

Router# show crypto ipsec sa

Router# show crypto isakmp sa

VRF

Configuration

Router(config)# ip vrf test
Router(config-vrf)# interface tunnel14
Router(config-if)# ip vrp forwarding test
Router(config-if)# ip address 14.14.14.14 255.255.255.0

Router(config)# router eigrp 10
Router(config-routrer)# address-family ipv4 vrf test autonomous-system 10

Show Command

Router# sh ip vrf

Router# show ip route vrf test

Router# ping vrf test 14.14.14.1 source 14.14.14.4

Router# show ip eigrp vrf test