On 19/04/13 19:59, Willard Dennis wrote:
Hi all,
Trying to do something with dnsmasq that I believe is
possible, but I cannot get it to work... First, please take a look at my
topology
diagram:
http://s1096.photobucket.com/user/willdennis/media/testbed_topology_diagram.png.html
My problem is with the "WANem VM" host. It is
connected to the two LANs, and I want the "10-net" interface to get a
specific IP assigned, as well as a default gateway (this is working.) The
problem is, I want the other NIC to get an IP assigned (which is working), but,
NO default gateway set for that NIC. So the state I want to end up with is:
Eth0 ("10-net") -> specific IP address
assigned, has default gateway set (same as all other hosts on that network that
use DHCP)
Eth1 ("20-net") -> pool IP address assigned,
NO default gateway set (unlike the other hosts on this network that use DHCP,
which all need a default gateway assigned)
Right now, the eth1 on the WANem host IS getting a
default gateway assigned, which leads to this host having two default paths
out:
Destination Gateway Genmask Flags
Metric Ref Use Iface
<netroutes redacted>
0.0.0.0 192.168.10.254 0.0.0.0 UG
0 0 0 eth0
0.0.0.0 192.168.20.254 0.0.0.0 UG
0 0 0 eth1
This is causing a reachability problem with this host.
Here are the active stanzas in dnsmasq.conf currently:
interface=vl10-ovsbr0
interface=vl20-ovsbr0
bind-interfaces
dhcp-range=vl10-ovsbr0,192.168.10.50,192.168.10.150,4h
dhcp-range=vl20-ovsbr0,192.168.20.50,192.168.20.150,4h
dhcp-host=52:54:00:d5:ee:4d,id:*,192.168.10.1
dhcp-mac=set:wanem-20,52:54:00:45:8c:6a
dhcp-option=vl10-ovsbr0,3,192.168.10.254
dhcp-option=vl20-ovsbr0,3,192.168.20.254
dhcp-option=net:wanem-20,3
I'm sure it's a simple config change, but I cannot seem
to figure it out... If someone could help me out here, I'd sure appreciate
it...
You're right , the change is simple. You just have to make the second
dhcp-option line NOT apply to you wanem-20 host, so
dhcp-option=vl20-ovsbr0,3,192.168.20.254
becomes
dhcp-option=tag:vl20-ovsbr0,tag:!wanem-20,3,192.168.20.254
The above uses the newer tag syntax, and assumes your copy of dnsmasq is
not ancient. If it's earlier than 2.53, then you need
dhcp-option=vl20-ovsbr0,#wanem-20,3,192.168.20.254
Cheers,
Simon.
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