Hi there, was my question(s) either: A) too tough, B) too easy, C) poorly posed, D) just too much ? I didn't get any reply, yet. How I'm expected to pose it? 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 > -----Messaggio originale----- > Da: linux-net-owner@xxxxxxxxxxxxxxx [mailto:linux-net- > owner@xxxxxxxxxxxxxxx] Per conto di Giampaolo Tomassoni > Inviato: mercoledì 9 maggio 2007 20.43 > A: linux-net@xxxxxxxxxxxxxxx > Oggetto: 2.6.20 and multipath routing > > 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 - 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
