[CentOS-virt] Need info on vnet mapping to guests

Sat Oct 24 22:00:46 UTC 2009
Ben M. <centos at rivint.com>

See if "xm top" gives you what you need.


Neil Aggarwal wrote:
> Hello:
> 
> I have a host running two KVM guests.  The guests
> use br0 and each has a static IP address.
> 
> I am trying to figure out if there is a way to
> use snmpd on the host to measure the traffic
> usage of the guests.  I do not want to require
> anything running on the guests since I do not
> control them.
> 
> Looking at netstat -in on the host, I see this
> info:
> 
> Kernel Interface table
> Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP
> TX-OVR Flg
> br0        1500   0   237609      0      0      0    13615      0      0 0
> BMRU
> eth0       1500   0   967594      0      0      0   354576      0      0 0
> BMRU
> lo        16436   0       63      0      0      0       63      0      0 0
> LRU
> virbr0     1500   0        0      0      0      0       32      0      0 0
> BMRU
> vnet0      1500   0    29802      0      0      0   306940      0      0 0
> BMRU
> vnet1      1500   0   311556      0      0      0   789331      0      0 0
> BMRU
> 
> Looking at the firewall logs for packets that hit the firewall, 
> I see that vnet1 is connected to guestA and vnet0 is connected to 
> guestB.
> 
> Is there a better way to determine which vnet is connected to
> which guest?
> 
> Also, does the mapping change when I stop and start guests
> or reboot the host?
> 
> Thanks,
> 	Neil
> 
> --
> Neil Aggarwal, (281)846-8957, www.JAMMConsulting.com
> Will your e-commerce site go offline if you have
> a DB server failure, fiber cut, flood, fire, or other disaster?
> If so, ask about our geographically redundant database system.
> 
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> http://lists.centos.org/mailman/listinfo/centos-virt
>