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Re: IPv6 and OVZ part deux [message #41423 is a reply to message #41338] Tue, 18 January 2011 20:45 Go to previous messageGo to previous message
Jean-Marc Pigeon is currently offline  Jean-Marc Pigeon
Messages: 27
Registered: October 2007
Junior Member
Bonjour,

Found difficult to set up IPV6 on a container, the key part
to catch is the bridge position within the stack. I was already
using veth with IPV4 config but it was not working properly
with IPV6.

Found lack of detailed example setup making "life difficult",
so I am providing my test setup, such it can be used as
starting point to some of you and a base for advise
or suggestion for those with an IPV6/IPV4 setup already
working.

On an standard IPV4 with VETH here is my production config (on the host side)

ifcfg-eth0=
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
HWADDR=00:26:B9:67:A7:E1
IPADDR=192.2Y.X.248
NETMASK=255.255.255.224

ifconfig eth0=
eth0 Link encap:Ethernet HWaddr 00:26:B9:67:A7:E1
inet addr:192.2Y.X.Y Bcast:192.2Y.X.255 Mask:255.255.X.224
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19359552 errors:0 dropped:0 overruns:0 frame:0
TX packets:38144778 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5174070630 (4.8 GiB) TX bytes:35554807003 (33.1 GiB)
Interrupt:177 Memory:dxXf0000-dff00000

ifcfg-br0=
DEVICE=br0
ONBOOT=yes
TYPE=Bridge
BOOTPROTO=static
IPADDR=192.0.2.1
NETMASK=255.255.255.255

ifconfig br0=
br0 Link encap:Ethernet HWaddr 00:18:51:08:8D:E1
inet addr:192.0.2.1 Bcast:192.0.2.1 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:135837164 errors:0 dropped:0 overruns:0 frame:0
TX packets:144774563 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:98367107659 (91.6 GiB) TX bytes:160370520042 (149.3 GiB)

with ifconfig VE as setup by vetctl start

testve Link encap:Ethernet HWaddr 00:18:51:EE:2A:1C
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:48523 errors:0 dropped:0 overruns:0 frame:0
TX packets:279080 errors:0 dropped:336 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2799240 (2.6 MiB) TX bytes:24558278 (23.4 MiB)



;----------------------------------------------------------- ----------
This configuration is workin alright on IPV4, but adding IPV6 make it
not working alright, the host was able to ping6 the VE but not the other way.



Found IPV6 Working config as such:


ifcfg-eth0=
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
BRIDGE=br0
HWADDR=00:19:D1:12:41:87

ifconfig eth0=
eth0 Link encap:Ethernet HWaddr 00:19:D1:12:41:87
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2262 errors:0 dropped:0 overruns:0 frame:0
TX packets:976 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:512724 (500.7 KiB) TX bytes:123021 (120.1 KiB)
Memory:e8000000-e8020000


ifcfg-br0=
DEVICE=br0
ONBOOT=yes
TYPE=Bridge
BOOTPROTO=dhcp
IPV6INIT=yes
IPV6_AUTOCONF=yes
DHCPV6C=yes

ifconfig br0=
br0 Link encap:Ethernet HWaddr 00:19:D1:12:41:87
inet addr:192.2Y.X.242 Bcast:192.2Y.X.255 Mask:255.255.255.224
inet6 addr: 2002::c02xY:Xf2/64 Scope:Global
inet6 addr: xX80::2Y:d1ff:xX12:4187/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2514 errors:0 dropped:0 overruns:0 frame:0
TX packets:1140 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:514621 (502.5 KiB) TX bytes:142714 (139.3 KiB)

you have both IPV4 and IPV6 assigned via DHCP.

I added an alias to br0 to keep IPV4 routing capablity.
ifcfg-br0:vegw=
DEVICE=br0:vegw
ONBOOT=no
IPADDR=192.0.2.1
NETMASK=255.255.255.255

ifconfig br0:vegw=
br0:vegw Link encap:Ethernet HWaddr 00:19:D1:12:41:87
inet addr:192.0.2.1 Bcast:192.0.2.1 Mask:255.255.255.255
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

This complet the HOST side setup.


On the VE side
ifcfg-eth0=
DEVICE=eth0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.2Y.X.77
NETMASK=255.255.255.255
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6ADDR=2001:2xY8::192.2Y.X.77/64
IPV6ADDR_SECONDARIES=2002::192.2Y.X.77/64

ifconfig eth0=
eth0 Link encap:Ethernet HWaddr 00:18:51:1E:6D:F4
inet addr:192.2Y.X.77 Bcast:192.2Y.X.77 Mask:255.255.255.255
inet6 addr: xX80::218:51ff:xX1e:6df4/64 Scope:Link
inet6 addr: 2002::c02xY:xX4d/64 Scope:Global
inet6 addr: 2001:2xY8::c02xY:xX4d/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:2671 errors:0 dropped:0 overruns:0 frame:0
TX packets:257 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:585756 (572.0 KiB) TX bytes:27772 (27.1 KiB)

As usual you have file route-eth0=
192.0.2.0/24 dev eth0 scope link
default via 192.0.2.1 dev eth0


on the VE
[root@testvz network-scripts]# ping6 -n -c 3 2002::c02xY:xXf2
PING 2002::c02xY:xXf2(2002::c02xY:xXf2) 56 data bytes
64 bytes from 2002::c02xY:xXf2: icmp_seq=0 ttl=64 time=0.445 ms
64 bytes from 2002::c02xY:xXf2: icmp_seq=1 ttl=64 time=0.035 ms
64 bytes from 2002::c02xY:xXf2: icmp_seq=2 ttl=64 time=0.034 ms

on the HOST
ping6 -c 3 -n 2002::c02xY:xX4d
PING 2002::c02xY:xX4d(2002::c02xY:xX4d) 56 data bytes
64 bytes from 2002::c02xY:xX4d: icmp_seq=0 ttl=64 time=1.77 ms
64 bytes from 2002::c02xY:xX4d: icmp_seq=1 ttl=64 time=0.037 ms
64 bytes from 2002::c02xY:xX4d: icmp_seq=2 ttl=64 time=0.041 ms


Sure enough IPV4 stack is still fully fonctionnal

my 2 cents, have fun and keep me posted.

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