On Nov 13, 2007 2:14 PM, Kelly McLaughlin <<a href="mailto:kelmac@mokancomm.net">kelmac@mokancomm.net</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div><span><font face="Arial" size="2">Greetings all, ( Hi
Monty and Jim )</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I need to specify
communication from a multicast IP to communicate on a specific Network
Card. </font></span><br> </div></div></blockquote><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div><span><font face="Arial" size="2">
My routing table appears as follows:</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">Destination
Gateway
Genmask
Flags
MSS
Window
irtt
I Face</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2"><a href="http://216.198.99.0" target="_blank">216.198.99.0</a> <a href="http://0.0.0.0" target="_blank">0.0.0.0</a>
<a href="http://255.255.255.192" target="_blank">255.255.255.192</a>
U
0
0 0
eth1</font></span></div>
<div><span><font face="Arial" size="2"><a href="http://10.0.0.0" target="_blank">10.0.0.0</a> <a href="http://0.0.0.0" target="_blank">0.0.0.0</a>
<a href="http://255.255.255.0" target="_blank">255.255.255.0</a>
U
0
0
0 eth0</font></span></div>
<div><span><font face="Arial" size="2"><a href="http://169.254.0.0" target="_blank">169.254.0.0</a>
<a href="http://0.0.0.0" target="_blank">0.0.0.0</a>
<a href="http://255.255.0.0" target="_blank">255.255.0.0</a>
U
0
0 0 eth1</font></span></div>
<div><span><font face="Arial" size="2"><a href="http://0.0.0.0" target="_blank">0.0.0.0</a> <a href="http://216.198.99.254" target="_blank">216.198.99.254</a>
<a href="http://0.0.0.0" target="_blank">0.0.0.0</a>
UG 0
0 0 eth1</font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">I have 2 network
cards. One with the adress of <a href="http://216.198.99.247" target="_blank">216.198.99.247</a> and a second NIC with
an adress of <a href="http://10.0.0.2" target="_blank">10.0.0.2</a>. The NIC with the 10. address is what I want to use
for a failover communication with a second server. The failover
communication software uses a multicast address of <a href="http://229.255.0.1" target="_blank">229.255.0.1</a>. </font></span></div></div></blockquote><div>If that software can be reconfigured to use the actual unicast address of the other server, it would be better. Unicast IP is much cleaner. Your Cisco is clearly not in on the multicast games you're trying to play, and by your description you don't have a router between the servers on the 10. network, just a crossover cable.
<br><br>That means you have to teach each of the two machines about the multicast addresses you want them to use.<br><br>If you want packets addressed to <a href="http://229.255.0.1">229.255.0.1</a> to be sent via eth0, then try using this command:
<br><b><font style="font-family: courier new,monospace;" size="2">/sbin/route add -host <a href="http://229.255.0.1">229.255.0.1</a> dev eth0</font></b><br>Put it in /etc/rc.local so it will always be run at boot. This should allow other multicast packets to stay on eth1. What this doesn't say is whether the other server will be listening on that IP. For that you may need to use an alias IP. I've never set up multicast, so I don't know for sure what all that entails.
<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div><span><font face="Arial" size="2"> The
default gateway is attached to the 216. network. And ping tests result in
the following: Pinging from 10. NIC I can only receive replies from the
other 10. address. From the 216. NIC I receive replies from everything but
I cannot establish the failover on this NIC. </font></span></div>
<div><span><font face="Arial" size="2"></font></span> </div>
<div><span><font face="Arial" size="2">What I want to do is
tell my computer ( Red Hat Enterprise Linux V.3 ) to force communication
from <a href="http://229.255.0.1" target="_blank">229.255.0.1</a> across the <a href="http://10.0.0.2" target="_blank">10.0.0.2</a> network card. If I can
accomplish this I believe my failover will work.</font></span></div>
<div><span><font face="Arial" size="2"></font></span> <br></div></div></blockquote></div><br>