Re: [Xen-users] 2 NIC HVM's not working properly.

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

David Todd wrote:
> I've asked this question before, and aside from a response asking me 
> if DHCP was turned on (it is and all other clients on that network are 
> communicating properly), received no further assistance. I hope 
> someone can be of further assistance this time.
>
> I have a CentOS 5 64-bit machine running a 4-core Intel processor and 
> 4GB of memory with two onboard network cards.
> The network cards are fully supported, eth0 and eth1 show up and 
> obtain DHCP addresses from their respective networks
> eth0 is 192.168.1.220 (/24 subnet) gateway: 192.168.1.254
> eth1 is 192.168.2.220 (/24 subnet) gateway: 192.168.2.254
> default gateway is 192.168.2.254 (eth1 comes up second, this is auto-set)
>
> I have this script running as my network-bridge script wrapper:
> #!/bin/sh
> dir=$(dirname "$0")
> "$dir/network-bridge" "$@" vifnum=0
> "$dir/network-bridge" "$@" vifnum=1
>
> as such, I have both bridges: xenbr0 mapped to eth0 and xenbr1 mapped 
> to eth1
> Any and all guests on XEN Virtualization obtain an IP address from the 
> eth0/xenbr0 side of the equation (an address on the 192.168.1.0/24 
> network)
> Any and all guests on XEN Virtualization DO NOT obtain an IP address 
> from the eth1/xenbr1 side of the equation (on the 192.168.2.0/24 network)
> Here is an example of one of my guest configurations:
> name = "VendPrintMDID"
> builder = "hvm"
> memory = "1024"
> disk = [ 'file:/xen/disks/VendPrintMDID,hda,w', 
> 'file:/xen/iso/MWS2003R2-i386-DISK1.iso,hdc:cdrom,r', 
> 'file:/xen/iso/MWS2003R2-i386-DISK2.iso,hdd:cd$
> vif = [ 'type=ioemu, mac=00:16:3e:4c:69:28, bridge=xenbr0', 
> 'type=ioemu, mac=01:16:3e:4c:69:28, bridge=xenbr1' ]
It's because the mac address for the second NIC is not from the reserved 
range for xen.  Use a mac address from 00:16:3e:xx:xx:xx.
--Sadique

> #uuid = "0a08915c-636d-cc1d-8a6c-8d1e457bdcd1"
> device_model = "/usr/lib64/xen/bin/qemu-dm"
> kernel = "/usr/lib/xen/boot/hvmloader"
> vnc=1
> vncunused=1
> apic=1
> acpi=1
> pae=1
>
> and the routing table:
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  
> irtt Iface
> 192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          
> 0 eth1
> 192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          
> 0 eth0
> 169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          
> 0 eth1
> 0.0.0.0         192.168.2.254   0.0.0.0         UG        0 0          
> 0 eth1
>
> ifconfig shows both xenbr0 and xenbr1 up, a bunch of vif's up/etc.
>
> does anyone have any clue what the problem is here and why my guests 
> can't communicate in or out on xenbr1?
> Thanks!
> David Todd
>
>
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