ipv6 in guests not worknig

29 Oct 2015

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Hi,

maybe there was some similar problem in past, but I haven't found any
solution for this.

I want to user IPv6 in our guest but it's not working.

When I try to ping the guest from out side world I see on the ovirt node
(3.5) following:

[root@dipovirt01 ~]# brctl show servers_dmz
bridge name    bridge id        STP enabled    interfaces
servers_dmz        8000.00269e02b640    no        bond0.30
                            vnet0

[root@dipovirt01 ~]# tcpdump -i bond0.30 -n icmp6
tcpdump: WARNING: bond0.30: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on bond0.30, link-type EN10MB (Ethernet), capture size 65535 bytes
09:32:04.475918 IP6 2a02:6300:0:21e::1 > ff02::1:ff00:b: ICMP6, neighbor
solicitation, who has 2a02:6300:0:21e::b, length 32

[root@dipovirt01 ~]# tcpdump -i servers_dmz -n icmp6
tcpdump: WARNING: servers_dmz: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on servers_dmz, link-type EN10MB (Ethernet), capture size
65535 bytes
09:32:45.683960 IP6 2a02:6300:0:21e::1 > ff02::1:ff00:b: ICMP6, neighbor
solicitation, who has 2a02:6300:0:21e::b, length 32

[root@dipovirt01 ~]# tcpdump -i vnet0 -n icmp6
tcpdump: WARNING: vnet0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vnet0, link-type EN10MB (Ethernet), capture size 65535 bytes

On the vnet0 interface I do not see any IPv6 ICMP ND packets, so in the
virtual machine.
I allowed IPv6 forwarding in sysctl and rebooted the node /to be sure/

[root@dipovirt01 ~]# cat /etc/sysctl.d/ipv6.conf
net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.default.forwarding = 1

Any suggestion what's wrong?

    bets regards
        Peter
-- 
*Peter Hudec*
Infraštruktúrny architekt
phudec@cnc.sk <mailto:phudec@cnc.sk>

*CNC, a.s.*
Borská 6, 841 04 Bratislava
Recepcia: +421 2  35 000 100

Mobil:+421 905 997 203
*www.cnc.sk* <http:///www.cnc.sk>

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    Hi,<br>
    <br>
    maybe there was some similar problem in past, but I haven't found
    any solution for this.<br>
    <br>
    I want to user IPv6 in our guest but it's not working.<br>
    <br>
    When I try to ping the guest from out side world I see on the ovirt
    node (3.5) following:<br>
    <br>
    [root@dipovirt01 ~]# brctl show servers_dmz<br>
    bridge name    bridge id        STP enabled    interfaces<br>
    servers_dmz        8000.00269e02b640    no        bond0.30<br>
                                vnet0<br>
    <br>
    [root@dipovirt01 ~]# tcpdump -i bond0.30 -n icmp6<br>
    tcpdump: WARNING: bond0.30: no IPv4 address assigned<br>
    tcpdump: verbose output suppressed, use -v or -vv for full protocol
    decode<br>
    listening on bond0.30, link-type EN10MB (Ethernet), capture size
    65535 bytes<br>
    09:32:04.475918 IP6 2a02:6300:0:21e::1 > ff02::1:ff00:b: ICMP6,
    neighbor solicitation, who has 2a02:6300:0:21e::b, length 32<br>
    <br>
    [root@dipovirt01 ~]# tcpdump -i servers_dmz -n icmp6<br>
    tcpdump: WARNING: servers_dmz: no IPv4 address assigned<br>
    tcpdump: verbose output suppressed, use -v or -vv for full protocol
    decode<br>
    listening on servers_dmz, link-type EN10MB (Ethernet), capture size
    65535 bytes<br>
    09:32:45.683960 IP6 2a02:6300:0:21e::1 > ff02::1:ff00:b: ICMP6,
    neighbor solicitation, who has 2a02:6300:0:21e::b, length 32<br>
    <br>
    <br>
    [root@dipovirt01 ~]# tcpdump -i vnet0 -n icmp6<br>
    tcpdump: WARNING: vnet0: no IPv4 address assigned<br>
    tcpdump: verbose output suppressed, use -v or -vv for full protocol
    decode<br>
    listening on vnet0, link-type EN10MB (Ethernet), capture size 65535
    bytes<br>
    <br>
    <br>
    On the vnet0 interface I do not see any IPv6 ICMP ND packets, so in
    the virtual machine.<br>
    I allowed IPv6 forwarding in sysctl and rebooted the node /to be
    sure/<br>
    <br>
    [root@dipovirt01 ~]# cat /etc/sysctl.d/ipv6.conf <br>
    net.ipv6.conf.all.forwarding = 1<br>
    net.ipv6.conf.default.forwarding = 1<br>
    <br>
    Any suggestion what's wrong?<br>
    <br>
        bets regards<br>
            Peter<br>
    <div class="moz-signature">-- <br>
      <font style="font-size: 12pt" face="Tahoma, sans-serif"
        color="#144d43" size="1"><b>Peter Hudec</b></font><br>
      <font style="font-size: 10pt" face="Tahoma, sans-serif"
        color="#144d43" size="1">Infraštruktúrny architekt</font><br>
      <font style="font-size: 10pt" face="Tahoma, sans-serif"
        color="#800080" size="1"><a href="mailto:phudec@cnc.sk">phudec@cnc.sk</a></font><br>
      <p>
        <font style="font-size: 10pt" face="Tahoma, sans-serif"
          color="#144d43" size="1"><b>CNC, a.s.</b></font><br>
        <font color="#144d43">Borská 6, 841 04 Bratislava</font><br>
        <font style="font-size: 10pt" face="Tahoma, sans-serif"
          color="#144d43" size="1">Recepcia: +421 2  35 000 100</font></p>
      <p>
        <font style="font-size: 10pt" face="Tahoma, sans-serif" size="1">Mobil:+421 905
          997 203</font><br>
        <a href="http:///www.cnc.sk"><font style="font-size: 10pt"
            face="Tahoma, sans-serif" color="#800080" size="1"><b>www.cnc.sk</b></font></a></p>
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Peter Hudec

Jiri Belka

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