[libvirt-users] How to add static routes?

[Nils Toedtmann]

Clarification:

On 02/26/2013 01:51 PM, Nils Toedtmann wrote:
> Hello
> 
> i have several libvirt hosts (CentOS6, kvm), each with an internal
> libvirt "default" network with "forward mode='route'". I have two
> questions concerning static routes.
> 
> To give some context: On each of my libvirt hosts there is a VM acting
> as a OpenVPN-gateway to the other libvirt hosts.
> 
> 
> 
> [A] How can i add a persistant static route on the libvirt host to one
> of its guests?

Read: How can i add a persistant static route TO the libvirt host (the
static route going via one of its guests)


> Someone had already asked this on this list in 2011 but apperently did
> not receive an answer [1]. Likewise, i found that a
> /etc/sysconfig/network-scripts/route-virbr0 does not get applied when
> libvirt starts its default network.
> 
> 
> 
> [B] How can i make libvirt's dnsmasq push static routes into the guests?
> 
> Apperently dnsmasq supports pushing of static routes using DHCP options
> 33 or 121 [2], e.g. "--dhcp-option=121,x.x.x.x/yy,z.z.z.z". But i did
> not find how to add that to a libvirt network declaration.
> 
> I know that if i had [A] working, the host could redirect the IP traffic
> on behalf of the guests, but i'd like to avoid the resulting extra hop
> and the flood of ICMP redirects.
> 
> 
> 
> Please advise.  Cheers  /nils.
> 
> 
> 
> [1]
> https://www.redhat.com/archives/libvirt-users/2011-December/msg00061.html
> [2] http://tools.ietf.org/html/rfc3442
> 
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