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I have a working router (thanks to Julian's patches and the threads on
this site) load balancing over Dual ISP's. Links for the curious (see router setup below as well) - Necessary Patches - http://www.ssi.bg/~ja/ How to Patch (I use Debian Sarge and downloaded the latest source from kernel.org) - http://www.desktop-linux.net/debkernel.htm Necessary Reading - http://www.ssi.bg/~ja/nano.txt A couple of fine tuning issues that are still giving me trouble though -- Question 1: One of my ISP's hands out IP Addresses dynamically -- has anyone found a way to handle this elegantly using dhcp client to put the routes automatically into the proper routing tables? Currently I just have another firewall in front of this interface to do the DHCP requests and maintain the dyndns. Question 2 : Because the second IP address is dynamic I am routing traffic from my email server out through the T1 only using an ip src route rule like so: ip rule add from 192.168.1.6 table 200 Is there a way to handle this traffic just for outgoing smtp using fwmark and tc so that other traffic from this server can load balance and only outgoing mail is forced over the T-1 line? My router config is like this so far and working for the load balancing : Currently I configure the main table with a priority of 50 for the main table then the following for three special routing tables ip rule add prio 50 table main ip ro add 127.0.0.0/8 dev lo scope link table 200 for the traffic that came in on the static T1 (eth2) : ip ro add 10.0.0.0/30 dev eth2 src 10.0.0.2 table t1 ip ro add default via 10.0.0.1 table t1 ip rule add prio 200 from 10.0.0.2 table t1 ip route append prohibit default table 200 metric 1 proto static table 201 for the traffic that came in on the Cable Modem (eth1) : ip ro add 192.168.111.0/30 dev eth1 src 192.168.111.2 table 201 ip ro add default via 192.168.111.1 table 201 ip rule add prio 201 from 192.168.111.2 table cable ip route append prohibit default table 201 metric 1 proto static 222 for the default global routes and load balancing: ip rule add prio 222 table 222 ip route add default table 222 proto static nexthop via 10.0.0.1 dev eth2 nexthop via 192.168.111.1 dev eth1 Regards, Mark Royan |
