[pve-devel] [PATCH] add routed network mode

[Alexandre DERUMIER]

about  
>>+my $external_iface = 'vmbr0'; # fixme: autotetect? 
>>No, we need to compare the network setup to find the interface 
>>where to send proxyarp.


Seem that $external_iface is not used anywhere in pve-routed script.

(enable_proxyarp($iface) use tap interface)

Bug ?



----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Lundi 26 Août 2013 15:40:39 
Objet: RE: [PATCH] add routed network mode 

> >>+sub enable_proxyarp { 
> >>+ my ($ifname) = @_; 
> >>+ 
> >>+ PVE::Tools::run_command("echo 1 > 
> >>+/proc/sys/net/ipv4/conf/$ifname/proxy_arp"); 
> >>+} 
> >>+ 
> >>+PVE::Tools::run_command("ifconfig $iface up"); 
> >>+enable_proxyarp($iface); 
> 
> 
> Do we really need proxyarp ? 

yes, see below. 

> I mean, arp request shouldn't go to external 
> vmbr0 unless eth0 is plugged on same bridge than vm nic 
> 
> 
> 
> >>+my $external_iface = 'vmbr0'; # fixme: autotetect? 
> 
> I think we can simply detect the vmbrX with the defaut gw ? 

No, we need to compare the network setup to find the interface 
where to send proxyarp. 

> >>+enable_proxyarp($iface); 
> >>+ 
> >>+PVE::Tools::run_command("route add -net $net->{ip} netmask 
> >>+255.255.255.255 dev $iface"); 
> 
> So, if I understand you don't use bridge ? but directly route from host to tap 
> interface ? 

yes 

> If yes,how do you setup guest configuration ? 

dhcp, but I have not any code so far.