Hi there, this is yet-another-question about multipath routing. I would like to do load-balancing on traffic outgoing through two DSL lines. I would prefer to increase the bandwidth of each connection instead of just the total one, thereby I guess I'm looking for a packet-based multipath routing solution. Somewhere in the Net I found someone writing that I was needed to rebuild my 2.6.20 with CONFIG_IP_ROUTE_MULTIPATH_CACHED=y and some CONFIG_IP_ROUTE_MULTIPATH_(RR|RANDOM|WRANDOM|DRR) in order to obtain this, since with CONFIG_IP_ROUTE_MULTIPATH_CACHED=n I could only do connection-oriented multipath routing. Is this true? I did compile my 2.6.20 with multipath caching on and all the multipath policies as modules, but I seem unable to obtain what I want. My setup is the following: - linux-2.6.20 from Gentoo (sys-kernel/gentoo-sources-2.6.20-r8) - iproute2-2.6.20.20070313 - two ClIP lines over ADSL - two ethernet cards eth0 is my local lan (say, 192.168.0.100/24), eth1 is my DMZ with two addresses (say, 1.1.1.6/29 and 1.2.1.6/29), atm0 is the ClIP interface (say, 1.1.2.1/24) to which my provider sends packet addressed to 1.1.1.0/29, while atm1 (say, 1.2.2.1/24) is the one receiving packets for 1.2.1.0/29. Isn't that easy? :) Ok, let me summarize: eth0: 192.168.0.100/24 eth1: 1.2.1.6/29 (first address) and 1.1.1.6/29 atm0: 1.1.2.1/24, point-to-point with 1.1.2.254, receives in behalf of 1.1.1.0/29 atm1: 1.2.2.1/24, point-to-point with 1.2.2.254, receives in behalf of 1.2.1.0/29 There are many services running in the router (smtp, http, https, pop3, imap, ftp, domain) which have to be accessed from Internet. It is basically much more an all-in-one box than just a router. So, I'm not actually interested in traffic to and from my DMZ, nor I am that much interested in having traffic from eth0 being dynamically MASQueraded with both the addresses of my DMZ. I would prefer to make things simple, so I decided that my outgoing address will always be 1.2.1.6, which is also the only address that "outside" knows to reach my services. The matter here is that I have plenty of downlink bandwidth per ADSL line, while I would like to obtain more uplink bandwidth. Thereby, after modprobing multipath_rr, I invoked this only, simple routing command: ip route add default src 1.2.1.6 mpath rr \ nexthop via 1.2.2.254 dev atm1 \ nexthop via 1.1.2.254 dev atm0 I see this way that outgoing packets seem to route on a per-connection basis: once a connection decided a path, that is kept until the connection shuts down. Now the questions: 1) Is there any way to obtain a per-packed balancing? 2) Would setting CONFIG_IP_ROUTE_MULTIPATH_CACHED=n help in this? I didn't (yet) try this latter because I'm quite sure it wouldn't help. 3) why do I need to pre-load multipath_rr? 4) when I do a "ip route list" I see: 1.2.1.0/29 dev eth1 proto kernel scope link src 1.2.1.6 1.1.1.0/29 dev eth1 proto kernel scope link src 1.1.1.6 192.168.0.0/24 dev eth0 proto kernel scope link src 192.168.0.100 1.2.2.0/24 dev atm1 proto kernel scope link src 1.2.2.1 1.1.2.0/24 dev atm0 proto kernel scope link src 1.1.2.1 127.0.0.0/8 dev lo scope link default src 1.2.1.6 nexthop via 1.2.2.254 dev atm0 weight 1 nexthop via 1.1.2.254 dev atm1 weight 1 See? The mpath I choose is not mentioned in the default route. Is it right? Many thanks, ------------------------------------- Giampaolo Tomassoni - I.T. Consultant Piazza VIII Aprile 1948, 4 I-53043 Chiusi (SI) - Italy Tel/Ph: +39-0578-21100 MAI mandare un messaggio a: NEVER send an e-mail to: rainbowl@xxxxxxxxxxxxx - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
