Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #179030

Re: TTL expired in transit to qemu virtual machine.

Show all headers | View raw

On 18.03.2017 07:22, Igor Cicimov wrote:
>     >uname -a
>     Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.84-1 x86_64 GNU/Linux
>
> That's an really old kernel, I don't start anything virtual these days without at least 3.13.x kernel.

I regularly do apt-get upgrade, but not to next Debian version. So, how this kernel be old for Debian 7?

> Hmmm, this doesn't make much sense to me, more specifically this part:
>
>         vlan-raw-device bond0
>         bridge_ports bond0
>
> Whats the purpose exactly of the vlan? Usually, and that is how I do it, you would split the VLAN's coming from the switch trunk port over the bond
> and attach them to separate bridges lets say:

Don't mind that line. I putted it as a reminder to continue extend networking in using vlans. For now there is no vlan used.


> That's strange indeed, except if br0 is used by something else like libvrit network that sets up the interface for proxy-arp. What's the output of:
>
> # brctl showmacs br0

port no mac addr                is local?       ageing timer
   1     bridge mac              yes                0.00
   8     fe:54:00:13:76:5b       yes                0.00
   5     fe:54:00:44:ac:39       yes                0.00
   6     fe:54:00:a8:35:fb       yes                0.00
   2     fe:54:00:c2:64:2d       yes                0.00
   4     fe:54:00:d5:17:fb       yes                0.00
   3     fe:54:00:de:83:2d       yes                0.00


> # ip route show

10.0.0.0/8 via 10.10.10.254 dev br0
10.10.0.0/16 dev br0  proto kernel  scope link  src 10.10.10.10


> # arp -n

gives a long list for local and virtual ip/mac

>
> on the host, and:
>
> # ip link show

I can't connect using ssh, only vnc.
This shows lo and eth0 with corresponding mac and is UP

> # ip route show
10.10.0.0/16 dev eth0 proto kernel scope link src 10.10.10.3
169.254.0.0/16 dev eth0 scope link metric 1002
default via 10.10.10.254 dev eth0

> # arp -n

gives a long list for local and virtual ip/mac


>
> on the problematic vm and on one of the good vm's?

Thouse 3 commands shows the same (except ip and mac) on both vm's.


>
> To find the loop I would start by doing ping between good and bad vm (both directions in turns) and check the traffic on the host interface:
>
> # tcpdump -ennqt -i br0 \( arp or icmp \)
>
> and corresponding network devices on both vm's too.

This gives me lot of output regarding arp and icmp on LAN.

> Any sysctl settings you might have changed on the host?

net.ipv4.ip_forward=1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_announce=2


-- 
Mimiko desu.

Back to linux.debian.user | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

TTL expired in transit to qemu virtual machine. Mimiko <vbvbrj@gmail.com> - 2017-03-17 12:00 +0100
  Re: TTL expired in transit to qemu virtual machine. Dominik George <nik@naturalnet.de> - 2017-03-17 12:30 +0100
    Re: TTL expired in transit to qemu virtual machine. Mimiko <vbvbrj@gmail.com> - 2017-03-20 07:30 +0100
  Re: TTL expired in transit to qemu virtual machine. Igor Cicimov <icicimov@gmail.com> - 2017-03-18 06:30 +0100
    Re: TTL expired in transit to qemu virtual machine. Mimiko <vbvbrj@gmail.com> - 2017-03-20 07:50 +0100
      Re: TTL expired in transit to qemu virtual machine. davidson@freevolt.org - 2017-03-21 01:30 +0100
        Re: TTL expired in transit to qemu virtual machine. Mimiko <vbvbrj@gmail.com> - 2017-03-23 07:40 +0100
          Re: TTL expired in transit to qemu virtual machine. Greg Wooledge <wooledg@eeg.ccf.org> - 2017-03-23 13:20 +0100
            Re: TTL expired in transit to qemu virtual machine. Mimiko <vbvbrj@gmail.com> - 2017-03-24 12:00 +0100

csiph-web