description ipv4-ipv6 protocol translation

addrouter r1
int eth1 eth 0000.0000.1111 $1a$ $1b$
!
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.1 255.255.255.252
 exit
ipv4 route v1 0.0.0.0 0.0.0.0 1.1.1.2
!

addrouter r2
int eth1 eth 0000.0000.2222 $1b$ $1a$
int eth2 eth 0000.0000.2222 $2a$ $2b$
!
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv4 addr 1.1.1.2 255.255.255.252
 exit
int eth2
 vrf for v1
 ipv6 addr 1234::101:106 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 exit
int tun1
 tunnel vrf v1
 tunnel key 120
 tunnel mode 6to4
 tunnel source eth2
 tunnel destination 1234::101:101
 vrf for v1
 ipv4 addr 1.1.1.0 255.255.255.0
 ipv6 addr 1234::101:100 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00
 exit
!

addrouter r3
int eth1 eth 0000.0000.3333 $2b$ $2a$
!
vrf def v1
 rd 1:1
 exit
int eth1
 vrf for v1
 ipv6 addr 1234::101:105 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 exit
ipv6 route v1 :: :: 1234::101:106
!


r2 tping 100 5 1.1.1.1 vrf v1
r2 tping 100 5 1234::101:105 vrf v1
r1 tping 100 5 1.1.1.5 vrf v1
r3 tping 100 5 1234::101:101 vrf v1