description cross connect tunnel interfaces addrouter r1 int ser1 ser - $1a$ $1b$ ! vrf def v1 rd 1:1 exit int ser1 vrf for v1 ipv4 addr 1.1.1.1 255.255.255.0 ipv6 addr 1234::1 ffff:: exit int tun1 tunnel vrf v1 tunnel mode gre tunnel source ser1 tunnel destination 1.1.1.2 vrf for v1 ipv4 addr 2.2.2.1 255.255.255.0 ipv6 addr 4321::1 ffff:: exit ! addrouter r2 int ser1 ser - $1b$ $1a$ int ser2 ser - $2a$ $2b$ ! vrf def v1 rd 1:1 exit int ser1 vrf for v1 ipv4 addr 1.1.1.2 255.255.255.0 ipv6 addr 1234::2 ffff:: exit int ser2 vrf for v1 ipv4 addr 1.1.2.2 255.255.255.0 ipv6 addr 1235::2 ffff:: exit int tun1 tunnel vrf v1 tunnel mode gre tunnel source ser1 tunnel destination 1.1.1.1 exit int tun2 tunnel vrf v1 tunnel mode gre tunnel source ser2 tunnel destination 1.1.2.1 connect tun1 exit ! addrouter r3 int ser1 ser - $2b$ $2a$ ! vrf def v1 rd 1:1 exit int ser1 vrf for v1 ipv4 addr 1.1.2.1 255.255.255.0 ipv6 addr 1235::1 ffff:: exit int tun1 tunnel vrf v1 tunnel mode gre tunnel source ser1 tunnel destination 1.1.2.2 vrf for v1 ipv4 addr 2.2.2.2 255.255.255.0 ipv6 addr 4321::2 ffff:: exit ! r1 tping 100 30 2.2.2.2 vrf v1 r1 tping 100 30 4321::2 vrf v1 r3 tping 100 30 2.2.2.1 vrf v1 r3 tping 100 30 4321::1 vrf v1