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07-26-2015 #1
- Join Date
- Jun 2015
- Posts
- 8
ICMP Signal works, 5 seconds later it doesn't work?
I wrote recently about my problem, but I had luck and restore the environment doesn't work.
My System is a physical Server with Suse Enterprise Server, and a virtual Machine with a Ubuntu Server.
I try the net structur just with a ICMP Signal by now.
my config about my Problem is following:
pyhsical machine: eth1; >virtual bridge: br0,> virtual nic:vnet1 (subnet 1)
this going to transfer in eth0 in the virtual machine
FORWARDING to:
eth1 in the virtual machine
then through ;
virtual nic: vnet0; > virtual bridge: br1; >physical machine: eth0 (subnet2)
First off all my communication between brX and vnetX (this ones in the same subnet) just works if I flush the iptables rules, generated by libvirt.
Then the problem:
I ping between br0 and vnet1: It's work! 5 seconds later. It isn't work but then I can ping between br1 and vnet0. And the other way not work.
My problem also that all my nics: ethX, brX and vnetX are permanent going down or disappear completely. This with tipping the command:
„ip addr show“ And I don't now how I get them to stay.
It is a arp Problem? I read about but I don't understand it until now.
My result of brctl show:
Code:bridge name stp enabled interfaces br0 no eth1 vnet1 br1 no eth0 vnet0 virbr0 yes virbr0-nic
I know there are to ways to connect VM's:
With a normal bridge (br) and a virtual bridge (virbr).
Thank you Flo
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07-29-2015 #2
- Join Date
- Jun 2015
- Posts
- 8
Hi Forum Users,
The bridges doesn't work reliable if the nic's it build of, vnetX and ethX not wired with a partner. I have no wire in my physical ethX. It's mean there was no wire to my router.
But now following:
I have a successfully ICMP signal which forwarding in my virtual machine.
When I use following command:
Code:ping -I 192.168.2.x 192.168.178.y
But now it's away again.
I don't no why?
Now I can ping from br0 to br1 without it recognized from my forwarding iptable rule in my virtual machine. And both br0 and br1 are in different subnets.
I have no forwarding activ in my physical server.
Thank you for reading,
Flo