0

I've migrated a server from vmware to openvz, both are running on the same physical host (I plan to eliminate vmware). If I give the new openvz container a new IP anybody on the LAN and outside network can get to it with no problem, but as soon as I change its IP address to the original IP (that the vmware guest used to have), only the host server and its contained virtual machines can get to it.

I have made sure to change the IP on the old virtual machine.

andyortlieb
  • 1,092
  • 1
  • 12
  • 25
  • 1
    You might be running into an ARP caching issue - have you verified the ARP cache contents of the hosts which are unable to connect? – the-wabbit Nov 03 '11 at 19:34
  • I only tried deleting the ARP record for that IP on the host server, but it complained that there was no record (even though it was listed when i issued 'arp'). ARP is one of those things I don't understand much about, do you think I might need to clear that cache on our sonicwall router? – andyortlieb Nov 03 '11 at 19:47
  • Can the new container access the outside network? Have you tried traceroute to and from the container? – Aleksandr Levchuk Nov 04 '11 at 13:11
  • It turned out to be the arp cache on our router. @syneticon-dj : if you post an answer I'll accept it, since your comment was invaluable. – andyortlieb Nov 06 '11 at 02:15

2 Answers2

1

Adding the hint as an answer:

You might be running into an ARP caching issue - have you verified the ARP cache contents of the hosts which are unable to connect?

the-wabbit
  • 40,737
  • 13
  • 111
  • 174
0

My openvz host still had a static route to the VM I migrated from openvz to KVM.

A route del -host <ip_addr> fixed the issue for me.

dunxd
  • 9,632
  • 22
  • 81
  • 118
Jeremiah
  • 1