https://wiki.openvz.org/api.php?action=feedcontributions&feedformat=atom&user=PtmanOpenVZ Virtuozzo Containers Wiki - User contributions [en]2026-06-13T19:26:39ZUser contributionsMediaWiki 1.31.1https://wiki.openvz.org/index.php?title=Source_based_routing&diff=5780Source based routing2008-04-16T12:01:05Z<p>Ptman: Added some info that helped me recently</p>
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<div>Sometimes you have more than one router in your network, and want different [[container]]s to use different routers. For that, you need to set up source-based routing on the host system. For example:<br />
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<pre><br />
# /sbin/ip rule add from $IP table $TBL<br />
# /sbin/ip route add default dev $ETH via $GW table $TBL<br />
# /sbin/ip route add $NET dev $ETH table $TBL<br />
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</pre><br />
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where<br />
* <code>$IP</code> is an IP address which should use non-default gateway. You can also use netmask here, e.g. <code>10.9.8.0/24</code> will mean that all containers with addresses like 10.9.8.x will be routed through the given gateway.<br />
* <code>$NET</code> is an IP network which should be routed straight, that is, not through the gateway. E.g. <code>10.9.8.0/24</code>.<br />
* <code>$ETH</code> is the network interface to route to, e.g. <code>eth0</code>.<br />
* <code>$GW</code> is a gateway for this IP address.<br />
* <code>$TBL</code> is any free table number, I use numbers from 6 upwards. Note that tables 250-255 are usually reserved (see <code>/etc/iproute2/rt_tables</code>).<br />
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Note that every new non-standard gateway will require another table number.<br />
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For more details on routing rules, see <code>man ip</code>.<br />
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== See also ==<br />
* {{Forum|268}}<br />
* {{Forum|492}}<br />
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[[Category:Networking]]<br />
[[Category:HOWTO]]</div>Ptman