[ovirt-users] No traffic on dummy interface

[Alan Murrell]

Hello,

I am running Ovirt 3.6.1 on CentOS 7.1 in a single server, hosted  
engine setup.


I have created 10 dummy dummy interfaces names 'dummy_[0-9]'.  Ovirt  
sees them, and in "Networks" for my cluster, I created 10 10  
"internal" networks called 'Internal_[0-9]'.


In the "Hosts" tab, in the "Network Interfaces" tab for my host, I  
assigned the 'dummy_*' interfaces tot he appropriate 'Internal_*'  
network (i.e., dummy_0 -> Internal_0, dummy_1 -> Internal_1, etc.)


I have create two VMs and assigned a NIC interface on each attached to  
the 'Internal_0' network.  I gave the interfaces on the gusts an IP  
int he same subnet, but they cannot talk to each other.


When I try to ping one from the other, here is the response I get  
(public IPs redacted):


--- START ---
C:\Users\Administrator>ping 192.168.100.12

Pinging 192.168.100.12 with 32 bytes of data:
Reply from 192.168.100.20: Destination host unreachable.
Reply from XX.XXX.XX.XX: TTL expired in transit.
Request timed out.
Reply from XX.XXX.XX.XX: TTL expired in transit.

Ping statistics for 192.168.100.12:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
--- END ---

The IP of the PC I am pinging from is '192.168.100.20'

I have been able to setup internal networks like this before, but seem  
to be missing something and I am not sure what?


Here is what the dummy_0 interface shows when I run 'ip addr show':

--- START ---
7: dummy_0:  mtu 1500 qdisc noqueue  
master Internal_0 state UNKNOWN

link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
--- END ---

and Internal_0 looks like this:

--- START ---
20: Internal_0:  mtu 1500 qdisc  
noqueue state UP

link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
inet6 fe80::dc07:84ff:fe1b:60cb/64 scope link
   valid_lft forever preferred_lft forever
--- END ---

I am not sure what other info you need, so please do let me know.

I did see this:  
 and  
except that I use 'dummy_*' instead of 'dummy*', my setup is the same.


Thanks, in advance, for your help on this.

Regards,

Alan
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Re: [ovirt-users] No traffic on dummy interface

[Alan Murrell]

OK, don't worry about this ticket.  It seems to be resolved now.  I 
noticed I was in fact missing "PROMISC=yes" in the ifcfg-dummy_* files, 
but even after adding, it I still needed to reboot the host for it to 
seemingly take effect (a simple "systemctl restart network" didn;t do 
the trick)


Weird :-(

-Alan


On 30/01/2016 10:03 AM, Alan Murrell wrote:

Hello,

I am running Ovirt 3.6.1 on CentOS 7.1 in a single server, hosted engine
setup.

I have created 10 dummy dummy interfaces names 'dummy_[0-9]'.  Ovirt
sees them, and in "Networks" for my cluster, I created 10 10 "internal"
networks called 'Internal_[0-9]'.

In the "Hosts" tab, in the "Network Interfaces" tab for my host, I
assigned the 'dummy_*' interfaces tot he appropriate 'Internal_*'
network (i.e., dummy_0 -> Internal_0, dummy_1 -> Internal_1, etc.)

I have create two VMs and assigned a NIC interface on each attached to
the 'Internal_0' network.  I gave the interfaces on the gusts an IP int
he same subnet, but they cannot talk to each other.

When I try to ping one from the other, here is the response I get
(public IPs redacted):

--- START ---
C:\Users\Administrator>ping 192.168.100.12

Pinging 192.168.100.12 with 32 bytes of data:
Reply from 192.168.100.20: Destination host unreachable.
Reply from XX.XXX.XX.XX: TTL expired in transit.
Request timed out.
Reply from XX.XXX.XX.XX: TTL expired in transit.

Ping statistics for 192.168.100.12:
 Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
--- END ---

The IP of the PC I am pinging from is '192.168.100.20'

I have been able to setup internal networks like this before, but seem
to be missing something and I am not sure what?

Here is what the dummy_0 interface shows when I run 'ip addr show':

--- START ---
7: dummy_0:  mtu 1500 qdisc noqueue master
Internal_0 state UNKNOWN
 link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
--- END ---

and Internal_0 looks like this:

--- START ---
20: Internal_0:  mtu 1500 qdisc noqueue
state UP
 link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
 inet6 fe80::dc07:84ff:fe1b:60cb/64 scope link
valid_lft forever preferred_lft forever
--- END ---

I am not sure what other info you need, so please do let me know.

I did see this:
 and
except that I use 'dummy_*' instead of 'dummy*', my setup is the same.

Thanks, in advance, for your help on this.

Regards,

Alan
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users