[Xen-users] No network on VM after migrating to another xcp server on the same pool

[Gabriel Queiroz Silva <gabriel@xxxxxxxxxxxxxxxxx>]

Hi,

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I have migrated one ubuntu VM from one XCP 1.6 server to another. After doing this, this VM is not able to connect to the networks as before. I have kept IP and MAC Addresses the same.

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After running ifconfig, i can see the interface as follows:

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eth0 Â Â ÂLink encap:Ethernet ÂHWaddr YYY Â

     inet addr:XXXX ÂBcast:XXXX ÂMask:255.255.255.192

     inet6 addr: XXXXXX/64 Scope:Link

     UP BROADCAST RUNNING MULTICAST ÂMTU:1500 ÂMetric:1

     RX packets:0 errors:0 dropped:0 overruns:0 frame:0

     TX packets:319 errors:0 dropped:0 overruns:0 carrier:0

     collisions:0 txqueuelen:1000Â

     RX bytes:0 (0.0 B) ÂTX bytes:13614 (13.6 KB)

     Interrupt:68Â

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lo    ÂLink encap:Local Loopback Â

     inet addr:127.0.0.1 ÂMask:255.0.0.0

     inet6 addr: ::1/128 Scope:Host

     UP LOOPBACK RUNNING ÂMTU:16436 ÂMetric:1

     RX packets:679 errors:0 dropped:0 overruns:0 frame:0

     TX packets:679 errors:0 dropped:0 overruns:0 carrier:0

     collisions:0 txqueuelen:0Â

     RX bytes:3985002 (3.9 MB) ÂTX bytes:3985002 (3.9 MB)

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Bringing down and up the eth0 interface works, as follows:

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root@xx:~# ifdown -v eth0

Configuring interface eth0=eth0 (inet)

run-parts --verbose /etc/network/if-down.d

run-parts: executing /etc/network/if-down.d/resolvconf

run-parts: executing /etc/network/if-down.d/sendmail

run-parts: executing /etc/network/if-down.d/upstart

run-parts: executing /etc/network/if-down.d/wpasupplicant

ip route del default via XXX metric 100 dev eth0 2>&1 1>/dev/null || trueÂ

ip -4 addr flush dev eth0 label eth0

ip link set dev eth0 down

run-parts --verbose /etc/network/if-post-down.d

run-parts: executing /etc/network/if-post-down.d/sendmail

run-parts: executing /etc/network/if-post-down.d/wireless-tools

run-parts: executing /etc/network/if-post-down.d/wpasupplicant

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root@xx:~# ifup -v eth0

Configuring interface eth0=eth0 (inet)

run-parts --verbose /etc/network/if-pre-up.d

run-parts: executing /etc/network/if-pre-up.d/ethtool

run-parts: executing /etc/network/if-pre-up.d/wireless-tools

run-parts: executing /etc/network/if-pre-up.d/wpasupplicant

ip addr add XXXX/255.255.255.192 broadcast + Â dev eth0 label eth0

ip link set dev eth0 Â up

Âip route add default via XXXX metric 100 dev eth0Â

run-parts --verbose /etc/network/if-up.d

run-parts: executing /etc/network/if-up.d/000resolvconf

run-parts: executing /etc/network/if-up.d/ethtool

run-parts: executing /etc/network/if-up.d/ntpdate

run-parts: executing /etc/network/if-up.d/openssh-server

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Routes seem to be in order:

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Destination   Gateway     Genmask     Flags Metric Ref  ÂUse Iface

0.0.0.0 Â Â Â Â XXX 0.0.0.0 Â Â Â Â UG Â Â100 Â Â0 Â Â Â Â0 eth0

XXX 0.0.0.0 Â Â Â Â 255.255.255.192 U Â Â 0 Â Â Â0 Â Â Â Â0 eth0

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But i still can't start the networking service...

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root@xxx:~# service networking start

networking stop/waiting

No error messages are shown anywhere.

Is there some point to the migration i could be missing? What could differ from one server to another to cause the networking to fail on the new host?

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Thanks,

Gabriel

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