Difference between revisions of "Source based routing"

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== See also ==
 
== See also ==
[http://forum.openvz.org/index.php?t=msg&th=268 Forum thread #268]
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* {{Forum|268}}
[http://forum.openvz.org/index.php?t=msg&th=492 Forum thread #492]
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* {{Forum|492}}
  
 
[[Category:Networking]]
 
[[Category:Networking]]
 
[[Category:HOWTO]]
 
[[Category:HOWTO]]

Revision as of 17:42, 20 July 2006

Sometimes you have more than one router in your network, and want different VEs to use different routers. For that, you need to set up source-based routing on the host system. For example:

# /sbin/ip rule add from $IP table $TBL
# /sbin/ip route add default dev eth0 via $GW table $TBL

where

  • $IP is an IP address which should use non-default gateway. You can also use netmask here, e.g. 10.9.8.0/24 will mean that all VEs with addresses like 10.9.8.x will be routed through the given gateway.
  • $GW is a gateway for this IP address.
  • $TBL is any free table number, I use numbers from 6 upwards. Note that tables 250-255 are usually reserved (see /etc/iproute2/rt_tables.

Note that every new non-standard gateway will require another table number.

For more details on routing rules, see man ip.

See also