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*SOLVED* broken networking... [message #9690]

Wed, 17 January 2007 09:25

wilf
Messages: 30
Registered: January 2007
Location: UK

Member

Hi,

I pinched Kai's format for this message as it seemed so clear and well presented Smile

I am running

Quote:

VZHost~# uname -a
Linux vzhost.b.c.uk 2.6.18-028test010 #2 Sun Jan 14 10:13:12 GMT 2007 x86_64 AMD Athlon(tm) 64 Processor 3200+ AuthenticAMD GNU/Linux
VZHost~# vzctl --version
vzctl version 3.0.13

under Gentoo 2006.1 for amd64.

Installation went fine, can vzctl enter from the VZHost to the VPS.
Network is up and running on the VZHost, and can ping internal and external addresses successfully.
I can ping from the VZHost to the outside world
I can ping from the outside world to the VZHost
I can't ping from the VZHost to the VPS
I can't ping from the VPS to the VZHost (or anywhere else for that matter)

Here is some info:
ifconfig -a
VZHost

VZHost:~# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:61:71:24:FB:AA
         inet addr:x.y.z.31  Bcast:x.y.z.255  Mask:255.255.255.0
         inet6 addr: fe80::216:17ff:fe42:6948/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:1005904 errors:0 dropped:0 overruns:0 frame:0
         TX packets:1079156 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:294041256 (280.4 Mb)  TX bytes:789113682 (752.5 Mb)
         Interrupt:16 Base address:0x4000

eth1      Link encap:Ethernet  HWaddr 00:61:71:24:FB:AB
         inet addr:a.b.c.134  Bcast:a.b.c.135  Mask:255.255.255.252
         inet6 addr: fe80::216:17ff:fe42:6f08/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:1047700 errors:0 dropped:0 overruns:0 frame:0
         TX packets:966836 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:789674957 (753.0 Mb)  TX bytes:286766768 (273.4 Mb)
         Interrupt:17 Base address:0x6000

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:25765 errors:0 dropped:0 overruns:0 frame:0
         TX packets:25765 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:2885680 (2.7 Mb)  TX bytes:2885680 (2.7 Mb)

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:12 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:1008 (1008.0 b)  TX bytes:0 (0.0 b)

VPS:

VZHost:~# vzctl exec 101  ifconfig -a
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: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)

venet0    Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:x.y.z.80  P-t-P:x.y.z.80  Bcast:0.0.0.0  Mask:255.255.255.255
          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)

route -n
VZHost:

VZHost:~# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
x.y.z.80        0.0.0.0         255.255.255.255 UH    0      0        0 venet0
a.b.c.132       0.0.0.0         255.255.255.252 U     0      0        0 eth1
x.y.z.0         x.y.z.46        255.255.255.0   UG    0      0        0 eth0
x.y.z.0         0.0.0.0         255.255.255.0   U     0      0        0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         a.b.c.133       0.0.0.0         UG    0      0        0 eth1

VPS:

VZHost:~# vzctl exec 101  route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
191.255.255.0   0.0.0.0         255.255.255.0   U     0      0        0 venet0
127.0.0.0       127.0.0.1       255.0.0.0       UG    0      0        0 lo
0.0.0.0         191.255.255.1   0.0.0.0         UG    0      0        0 venet0

These are the VPSs on my VZHost:

VZHost:~# vzlist -a
     VPSID      NPROC STATUS  IP_ADDR         HOSTNAME
      101          1 running                 -

I created a sh script to show what is happening and what is not happening:-

echo ------ VPS
vzctl exec 101 ifconfig -a
echo ------ VZHost
ifconfig -a
ping -c 5 x.y.z.80
echo ------ VPS
vzctl exec 101 ifconfig -a
echo ------ VZHost
ifconfig -a
echo ------ VPS
vzctl exec 101 ping -c 5 x.y.z.31
echo ------ VPS
vzctl exec 101 ifconfig -a
echo ------ VZHost
ifconfig -a

I ran the script as follows:-

2>&1 ~/netvpsstat | tee ~/netvps.txt

I have pruned the lo and eth interfaces from the following results in ~/netvps.txt for clarity (and hopefully I haven't removed the most important info Smile

Quote:

------ VPS
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:x.y.z.80 P-t-P:x.y.z.80 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:2100 (2.0 Kb)

------ VZHost
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:37 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:3108 (3.0 Kb) TX bytes:0 (0.0 b)

PING x.y.z.80 (x.y.z.80) 56(84) bytes of data.
From x.y.z.31 icmp_seq=1 Destination Host Unreachable
From x.y.z.31 icmp_seq=1 Destination Host Unreachable
From x.y.z.31 icmp_seq=1 Destination Host Unreachable
From x.y.z.31 icmp_seq=1 Destination Host Unreachable
From x.y.z.31 icmp_seq=1 Destination Host Unreachable

--- x.y.z.80 ping statistics ---
0 packets transmitted, 0 received, +5 errors

------ VPS
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:x.y.z.80 P-t-P:x.y.z.80 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:25 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:2100 (2.0 Kb)

------ VZHost
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:37 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:3108 (3.0 Kb) TX bytes:0 (0.0 b)

------ VPS
PING x.y.z.31 (x.y.z.31) 56(84) bytes of data.

--- x.y.z.31 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 3999ms

------ VPS
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:x.y.z.80 P-t-P:x.y.z.80 Bcast:0.0.0.0 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:30 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:2520 (2.4 Kb)

------ VZHost
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:42 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:3528 (3.4 Kb) TX bytes:0 (0.0 b)

From this, I can see that

o the VZHost is not sending packets to the VPS
o the VPS is successfully sending packets to the VZHost - which is not responding.

Any help is appreciated,

Paul ...

[ Show the rest of the message ]

[Updated on: Sat, 20 January 2007 20:57]

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[Message index]

		SOLVED broken networking... By: wilf on Wed, 17 January 2007 09:25
		Re: broken networking... By: rickb on Wed, 17 January 2007 11:48
		Re: broken networking... By: wilf on Wed, 17 January 2007 12:27
		Re: broken networking... By: rickb on Wed, 17 January 2007 15:26
		Re: broken networking... By: dev on Thu, 18 January 2007 14:34
		Re: broken networking... By: wilf on Sat, 20 January 2007 20:56

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