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IPs constantly disconnecting [message #40741]

Mon, 27 September 2010 08:46

jikson26
Messages: 1
Registered: September 2010

Junior Member

Hello,

for some months I have been using OpenVZ with several IPs. I am using cPanel with this VM. there was nothing wrong until about a month ago; my IPs started disconnecting at regular intervals.

It seemed that maybe the ARP entries kept disappearing, I would have to add the IPs to the host node and ping them each time to get them working again, then add them to the VM again.

Are there any known issues similar to this?

Hope someone can help! Thanks!

Info:

# ip rule list
0:      from all lookup 255
32766:  from all lookup main
32767:  from all lookup defaul

# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
xxx.xxx.29.204   0.0.0.0         255.255.255.255 UH    0      0        0 veth101.0
xxx.xxx.29.205   0.0.0.0         255.255.255.255 UH    0      0        0 veth101.0
xxx.xxx.29.206   0.0.0.0         255.255.255.255 UH    0      0        0 veth101.0
xxx.xxx.29.203   0.0.0.0         255.255.255.255 UH    0      0        0 veth101.0
xxx.xxx.29.200   0.0.0.0         255.255.255.248 U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         xxx.xxx.29.201   0.0.0.0         UG    0      0        0 eth0

# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:17:08:D1:06:D3
          inet addr:xxx.xxx.29.202  Bcast:xxx.xxx.29.207  Mask:255.255.255.248
          inet6 addr: fe80::217:8ff:fed1:6d3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:41001262 errors:0 dropped:0 overruns:0 frame:0
          TX packets:45043959 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:17032410607 (15.8 GiB)  TX bytes:36627639484 (34.1 GiB)
          Interrupt:233 Memory:ca000000-ca010000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:677 errors:0 dropped:0 overruns:0 frame:0
          TX packets:677 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:246164 (240.3 KiB)  TX bytes:246164 (240.3 KiB)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          UP BROADCAST POINTOPOINT RUNNING NOARP  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth101.0 Link encap:Ethernet  HWaddr 00:18:51:BC:64:AA
          inet6 addr: fe80::218:51ff:febc:64aa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:45204612 errors:0 dropped:0 overruns:0 frame:0
          TX packets:40660658 errors:0 dropped:9 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:35733073122 (33.2 GiB)  TX bytes:16144734528 (15.0 GiB)

#  iptables -t nat -L && iptables -t filter -L && iptables -t mangle -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination

Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination

# arp -an
? (xxx.xxx.29.201) at 00:D0:02:F0:54:00 [ether] on eth0
? (xxx.xxx.29.203) at 00:18:51:19:D1:B7 [ether] on veth101.0
? (xxx.xxx.29.204) at 00:18:51:19:D1:B7 [ether] on veth101.0
? (xxx.xxx.29.206) at <incomplete> on veth101.0

[Updated on: Mon, 27 September 2010 09:13]

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