description lapb tunneling with tzsp addrouter r1 int ser1 ser - $1a$ $1b$ ! vrf def v1 rd 1:1 exit int ser1 enc lapb lapb mode dce 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 eth1 eth 0000.0000.2222 $2a$ $2b$ ! vrf def v1 rd 1:1 exit int eth1 vrf for v1 ipv4 addr 1.1.1.1 255.255.255.0 ipv6 addr 1234::1 ffff:: exit int ser1 enc lapb xconnect v1 eth1 tzsp 1.1.1.2 1234 exit ! addrouter r3 int eth1 eth 0000.0000.3333 $2b$ $2a$ int ser1 ser - $3a$ $3b$ ! vrf def v1 rd 1:1 exit int eth1 vrf for v1 ipv4 addr 1.1.1.2 255.255.255.0 ipv6 addr 1234::2 ffff:ffff:: exit int ser1 enc lapb lapb mode dce xconnect v1 eth1 tzsp 1.1.1.1 1234 exit ! addrouter r4 int ser1 ser - $3b$ $3a$ ! vrf def v1 rd 1:1 exit int ser1 enc lapb vrf for v1 ipv4 addr 2.2.2.2 255.255.255.0 ipv6 addr 4321::2 ffff:: exit ! r2 tping 100 10 1.1.1.2 vrf v1 r3 tping 100 10 1.1.1.1 vrf v1 r1 tping 100 10 2.2.2.2 vrf v1 r1 tping 100 10 4321::2 vrf v1 r4 tping 100 10 2.2.2.1 vrf v1 r4 tping 100 10 4321::1 vrf v1