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List: centos-virt
Subject: [CentOS-virt] ipv6 routing problem
From: Khapare Joshi <khapare77 () gmail ! com>
Date: 2015-04-30 16:20:49
Message-ID: CABHhH+uErWfJTinhvn7CkncOtGAz7-3mehPqbpo=3taQUVq0hw () mail ! gmail ! com
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I have centos 6 running kvm. IPv4 works perfectly works. But I am having
some problem with ipv6, looks like its bridge routing problem but stuck.
here are my bridge detail:
bridge name bridge id STP enabled interfaces
br0 8000.000af75613f2 no eth1
vnet1
br4 8000.000af75613f0 no eth0
ip -6 route shows :
unreachable ::/96 dev lo metric 1024 error -101 mtu 65536 advmss 65476
hoplimit 4294967295
unreachable ::ffff:0.0.0.0/96 dev lo metric 1024 error -101 mtu 65536
advmss 65476 hoplimit 4294967295
unreachable 2002:a00::/24 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
unreachable 2002:7f00::/24 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
unreachable 2002:a9fe::/32 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
unreachable 2002:ac10::/28 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
unreachable 2002:c0a8::/32 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
unreachable 2002:e000::/19 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
2a00:c88:4000:1431::/64 dev br0 proto kernel metric 256 mtu 1500 advmss
1440 hoplimit 4294967295
2a00:c88:4000:1650::/64 dev br4 proto kernel metric 256 mtu 1500 advmss
1440 hoplimit 4294967295
unreachable 3ffe:ffff::/32 dev lo metric 1024 error -101 mtu 65536 advmss
65476 hoplimit 4294967295
fe80::/64 dev vnet0 proto kernel metric 256 mtu 1500 advmss 1440
hoplimit 4294967295
fe80::/64 dev vnet1 proto kernel metric 256 mtu 1500 advmss 1440
hoplimit 4294967295
fe80::/64 dev vnet2 proto kernel metric 256 mtu 1500 advmss 1440
hoplimit 4294967295
fe80::/64 dev vnet3 proto kernel metric 256 mtu 1500 advmss 1440
hoplimit 4294967295
fe80::/64 dev eth0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit
4294967295
fe80::/64 dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit
4294967295
fe80::/64 dev br0 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit
4294967295
fe80::/64 dev br4 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit
4294967295
default via 2a11:c99:4111:110::11:211 dev br4 metric 1 mtu 1500 advmss
1440 hoplimit 4294967295
Then I added, /etc/sysconfig/network-script/ifcfg-br4
DEVICE=br4
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=static
IPADDR=ipv4address here
NETMASK=255.255.255.0
DNS1=mydnsserver.org
DELAY=0
NM_CONTROLLED=no
IPV6INIT=yes
IPV6_AUTOCONF=no
#IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL=yes
IPV6ADDR=2a11:c99:4111:110::11:65/64
IPV6_DEFAULTGW= 2a11:c99:4111:110::11:211
I can ping the gateway from the kvm host but I cannot ping6 out from the
kvm guest, also I cannot ping kvm guest from external host that is in ipv6
network.
I appreciate some guidance on this.
[Attachment #5 (text/html)]
<div dir="ltr">I have centos 6 running kvm. IPv4 works perfectly works. But I am \
having some problem with ipv6, looks like its bridge routing problem but stuck. \
<div><br></div><div>here are my bridge detail:</div><div><br></div><div><div>bridge \
name<span class="" style="white-space:pre"> </span>bridge id<span class="" \
style="white-space:pre"> </span>STP enabled<span class="" \
style="white-space:pre"> </span>interfaces</div><div>br0<span class="" \
style="white-space:pre"> </span>8000.000af75613f2<span class="" \
style="white-space:pre"> </span>no<span class="" \
style="white-space:pre"> </span>eth1</div><div><span class="" \
style="white-space:pre"> </span>vnet1</div><div>br4<span class="" \
style="white-space:pre"> </span>8000.000af75613f0<span class="" \
style="white-space:pre"> </span>no<span class="" \
style="white-space:pre"> </span>eth0</div></div><div><br></div><div>ip -6 route \
shows :</div><div><br></div><div><div>unreachable ::/96 dev lo metric 1024 error \
-101 mtu 65536 advmss 65476 hoplimit 4294967295</div><div>unreachable ::ffff:<a \
href="http://0.0.0.0/96">0.0.0.0/96</a> dev lo metric 1024 error -101 mtu 65536 \
advmss 65476 hoplimit 4294967295</div><div>unreachable 2002:a00::/24 dev lo metric \
1024 error -101 mtu 65536 advmss 65476 hoplimit 4294967295</div><div>unreachable \
2002:7f00::/24 dev lo metric 1024 error -101 mtu 65536 advmss 65476 hoplimit \
4294967295</div><div>unreachable 2002:a9fe::/32 dev lo metric 1024 error -101 mtu \
65536 advmss 65476 hoplimit 4294967295</div><div>unreachable 2002:ac10::/28 dev lo \
metric 1024 error -101 mtu 65536 advmss 65476 hoplimit \
4294967295</div><div>unreachable 2002:c0a8::/32 dev lo metric 1024 error -101 mtu \
65536 advmss 65476 hoplimit 4294967295</div><div>unreachable 2002:e000::/19 dev lo \
metric 1024 error -101 mtu 65536 advmss 65476 hoplimit \
4294967295</div><div>2a00:c88:4000:1431::/64 dev br0 proto kernel metric 256 \
mtu 1500 advmss 1440 hoplimit 4294967295</div><div>2a00:c88:4000:1650::/64 dev br4 \
proto kernel metric 256 mtu 1500 advmss 1440 hoplimit \
4294967295</div><div>unreachable 3ffe:ffff::/32 dev lo metric 1024 error -101 mtu \
65536 advmss 65476 hoplimit 4294967295</div><div>fe80::/64 dev vnet0 proto kernel \
metric 256 mtu 1500 advmss 1440 hoplimit 4294967295</div><div>fe80::/64 dev vnet1 \
proto kernel metric 256 mtu 1500 advmss 1440 hoplimit \
4294967295</div><div>fe80::/64 dev vnet2 proto kernel metric 256 mtu 1500 \
advmss 1440 hoplimit 4294967295</div><div>fe80::/64 dev vnet3 proto kernel metric \
256 mtu 1500 advmss 1440 hoplimit 4294967295</div><div>fe80::/64 dev eth0 proto \
kernel metric 256 mtu 1500 advmss 1440 hoplimit 4294967295</div><div>fe80::/64 \
dev eth1 proto kernel metric 256 mtu 1500 advmss 1440 hoplimit \
4294967295</div><div>fe80::/64 dev br0 proto kernel metric 256 mtu 1500 advmss \
1440 hoplimit 4294967295</div><div>fe80::/64 dev br4 proto kernel metric 256 \
mtu 1500 advmss 1440 hoplimit 4294967295</div><div>default via \
2a11:c99:4111:110::11:211 dev br4 metric 1 mtu 1500 advmss 1440 hoplimit \
4294967295</div></div><div><br></div><div>Then I added, \
/etc/sysconfig/network-script/ifcfg-br4</div><div><div>DEVICE=br4</div><div>TYPE=Bridge</div><div>ONBOOT=yes</div><div>BOOTPROTO=static</div><div>IPADDR=ipv4address \
here</div><div>NETMASK=255.255.255.0</div><div>DNS1=<a \
href="http://mydnsserver.org">mydnsserver.org</a><br></div><div>DELAY=0<br></div><div> \
NM_CONTROLLED=no</div><div>IPV6INIT=yes</div><div>IPV6_AUTOCONF=no</div><div>#IPV6_DEF \
ROUTE="yes"</div><div>IPV6_FAILURE_FATAL=yes</div><div>IPV6ADDR=2a11:c99:4111:110::11:65/64</div><div>IPV6_DEFAULTGW= \
2a11:c99:4111:110::11:211</div></div><div><br></div><div>I can ping the gateway from \
the kvm host but I cannot ping6 out from the kvm guest, also I cannot ping kvm guest \
from external host that is in ipv6 network.</div><div><br></div><div>I appreciate \
some guidance on this. </div><div><br></div><div><br></div><div><br></div></div>
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