rendered paste bodyxen dom0 config is :
(network-script 'network-nat netdev=dummy0')
(vif-script vif-nat)
# ip -6 addr show
1: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qlen 1000
inet6 fe80::240:63ff:fee5:c6d0/64 scope link
valid_lft forever preferred_lft forever
2: lo: <LOOPBACK,UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
19: dummy0: <BROADCAST,NOARP,UP> mtu 1500
inet6 fe80::30ef:2ff:fe5e:2769/64 scope link
valid_lft forever preferred_lft forever
21: vif1.0: <BROADCAST,MULTICAST,UP> mtu 1500
inet6 fe80::fcff:ffff:feff:ffff/64 scope link
valid_lft forever preferred_lft forever
22: vif2.0: <BROADCAST,MULTICAST,UP> mtu 1500
inet6 2001:6f8:37e::1/48 scope global
valid_lft forever preferred_lft forever
inet6 fe80::fcff:ffff:feff:ffff/64 scope link
valid_lft forever preferred_lft forever
24: sixxs@NONE: <POINTOPOINT,NOARP,UP> mtu 1480
inet6 2001:6f8:202:f9::2/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::a00:280/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::c0a8:180/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::c0a8:1fe/64 scope link
valid_lft forever preferred_lft forever
inet6 fe80::58bf:2122/64 scope link
valid_lft forever preferred_lft forever
# ip -6 route show
2001:6f8:202:f9::/64 via :: dev sixxs metric 256 expires 21330616sec mtu 1480 advmss 1420 metric 10 4294967295
2001:6f8:37e::/48 dev vif2.0 metric 256 expires 21330748sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 dev eth0 metric 256 expires 21329593sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 dev dummy0 metric 256 expires 21330202sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 dev vif1.0 metric 256 expires 21330326sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 dev vif2.0 metric 256 expires 21330469sec mtu 1500 advmss 1440 metric 10 4294967295
fe80::/64 via :: dev sixxs metric 256 expires 21330616sec mtu 1480 advmss 1420 metric 10 4294967295
ff00::/8 dev eth0 metric 256 expires 21329593sec mtu 1500 advmss 1440 metric 10 4294967295
ff00::/8 dev dummy0 metric 256 expires 21330202sec mtu 1500 advmss 1440 metric 10 4294967295
ff00::/8 dev vif1.0 metric 256 expires 21330326sec mtu 1500 advmss 1440 metric 10 4294967295
ff00::/8 dev vif2.0 metric 256 expires 21330469sec mtu 1500 advmss 1440 metric 10 4294967295
ff00::/8 dev sixxs metric 256 expires 21330616sec mtu 1480 advmss 1420 metric 10 4294967295
default dev sixxs metric 1024 expires 21330616sec mtu 1480 advmss 1420 metric 10 4294967295
# sysctl -a |grep forward
error: "Operation not permitted" reading key "net.ipv6.route.flush"
error: "Operation not permitted" reading key "net.ipv4.route.flush"
net.ipv6.conf.sixxs.forwarding = 1
net.ipv6.conf.vif2/0.forwarding = 1
net.ipv6.conf.vif1/0.forwarding = 1
net.ipv6.conf.dummy0.forwarding = 1
net.ipv6.conf.eth0.forwarding = 1
net.ipv6.conf.default.forwarding = 1
net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.lo.forwarding = 1
net.ipv4.conf.vif2/0.mc_forwarding = 0
net.ipv4.conf.vif2/0.forwarding = 1
net.ipv4.conf.vif1/0.mc_forwarding = 0
net.ipv4.conf.vif1/0.forwarding = 1
net.ipv4.conf.dummy0.mc_forwarding = 0
net.ipv4.conf.dummy0.forwarding = 1
net.ipv4.conf.eth0.mc_forwarding = 0
net.ipv4.conf.eth0.forwarding = 1
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.default.forwarding = 1
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.all.forwarding = 1
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.lo.forwarding = 1
net.ipv4.ip_forward = 1
(xxxx) replaced to anonymize a little bit
# iptables-save
# Generated by iptables-save v1.3.5 on Wed Jul 26 02:55:41 2006
*raw
:PREROUTING ACCEPT [5057:473215]
:OUTPUT ACCEPT [2839:547828]
COMMIT
# Completed on Wed Jul 26 02:55:41 2006
# Generated by iptables-save v1.3.5 on Wed Jul 26 02:55:41 2006
*nat
:PREROUTING ACCEPT [68:5324]
:POSTROUTING ACCEPT [63:5069]
:OUTPUT ACCEPT [31:2203]
-A PREROUTING -i eth0 -j DNAT --to-destination 192.168.1.1
-A POSTROUTING -o dummy0 -j MASQUERADE
-A POSTROUTING -s 192.168.1.0/255.255.255.0 -o eth0 -j SNAT --to-source 88.xx.xx.xx
COMMIT
# Completed on Wed Jul 26 02:55:41 2006
# Generated by iptables-save v1.3.5 on Wed Jul 26 02:55:41 2006
*mangle
:PREROUTING ACCEPT [5057:473215]
:INPUT ACCEPT [4372:342544]
:FORWARD ACCEPT [662:122592]
:OUTPUT ACCEPT [2839:547828]
:POSTROUTING ACCEPT [3501:670420]
COMMIT
# Completed on Wed Jul 26 02:55:41 2006
# Generated by iptables-save v1.3.5 on Wed Jul 26 02:55:41 2006
*filter
:INPUT ACCEPT [4372:342544]
:FORWARD ACCEPT [662:122592]
:OUTPUT ACCEPT [2839:547828]
-A FORWARD -s 192.168.1.1 -m physdev --physdev-in vif1.0 -j ACCEPT
-A FORWARD -p udp -m physdev --physdev-in vif1.0 -m udp --sport 68 --dport 67 -j ACCEPT
-A FORWARD -s 10.0.0.0/255.255.0.0 -m physdev --physdev-in vif2.0 -j ACCEPT
-A FORWARD -p udp -m physdev --physdev-in vif2.0 -m udp --sport 68 --dport 67 -j ACCEPT
COMMIT
# Completed on Wed Jul 26 02:55:41 2006
========================================
Dom1 / ipv4 only, works perfectly
192.168.1.1
name = "dom1"
vif = [ 'ip=192.168.1.1' ]
disk = ['file:...
========================================
Dom2 / ipv6 only
name = "dom0"
vif = ['bridge=xenbr0']
disk = ['file:...
~# ip addr show
1: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:16:3e:05:c2:60 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.10/24 brd 192.168.1.255 scope global eth0
inet6 2001:6f8:37e::10/48 scope global
valid_lft forever preferred_lft forever
inet6 fe80::216:3eff:fe05:c260/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
~# ip -6 route show
2001:6f8:37e::/48 dev eth0 metric 256 expires 21330222sec mtu 1500 advmss 1440 hoplimit 4294967295
fe80::/64 dev eth0 metric 256 expires 21330178sec mtu 1500 advmss 1440 hoplimit 4294967295
ff00::/8 dev eth0 metric 256 expires 21330178sec mtu 1500 advmss 1440 hoplimit 4294967295
default dev eth0 metric 1024 expires 21330546sec mtu 1500 advmss 1440 hoplimit 4294967295