description source port randomization 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 ipv6 addr 1234:1::1 ffff:ffff:: exit server telnet tel vrf v1 port 666 exit ! 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 ipv6 addr 1234:1::2 ffff:ffff:: exit int eth2 vrf for v1 ipv4 addr 1.1.1.5 255.255.255.252 ipv6 addr 1234:2::1 ffff:ffff:: exit access-list test4 permit all 1.1.1.4 255.255.255.252 all 1.1.1.0 255.255.255.252 all exit access-list test6 permit all 1234:2:: ffff:ffff:: all 1234:1:: ffff:ffff:: all exit ipv4 nat v1 seq 10 srclist test4 interface ethernet1 ipv4 nat v1 seq 10 random 1024 2048 ipv6 nat v1 seq 10 srclist test6 interface ethernet1 ipv6 nat v1 seq 10 random 1024 2048 ! addrouter r3 int eth1 eth 0000.0000.3333 $2b$ $2a$ ! vrf def v1 rd 1:1 exit int eth1 vrf for v1 ipv4 addr 1.1.1.6 255.255.255.252 ipv6 addr 1234:2::2 ffff:ffff:: exit ipv4 route v1 0.0.0.0 0.0.0.0 1.1.1.5 ipv6 route v1 :: :: 1234:2::1 ! r2 tping 100 5 1.1.1.1 vrf v1 r2 tping 100 5 1234:1::1 vrf v1 r2 tping 100 5 1.1.1.6 vrf v1 r2 tping 100 5 1234:2::2 vrf v1 r3 send telnet 1.1.1.1 666 vrf v1 r3 tping 100 5 1.1.1.1 vrf v1 r3 send exit r3 read closed r3 send telnet 1234:1::1 666 vrf v1 r3 tping 100 5 1234:1::1 vrf v1 r3 send exit r3 read closed r2 output show ipv4 nat v1 tran r2 output show ipv6 nat v1 tran