Thank you Tom. Can you clarify the significance of the numbers: e.g. provider a weight 1, provider b weight 10, provider c weight 100, which provider is preferred and what will be the proportional allocation of new flows? - Norm
On Thu, Jan 10, 2019 at 5:53 PM Tom Eastep <teas...@shorewall.net> wrote: > Hi Norm, > > On 1/9/19 11:24 PM, Norman Henderson wrote: > > Hi, We have several different real internet connections as well as > > tunnels used for certain purposes. Some have "capped" volume and others > > not; the ones that do not have different data rates; and all have > > varying reliability. > > > > I'm having trouble understanding how the weight values work for the > > options balance= and fallback= on a provider. > > > > I saw IP Route documentation suggesting that weights on "nexthop" > > clauses (which are what get created by the cited options in the > > providers file), are packet proportions i.e. > > nexthop via x weight 1 > > nexthop via y weight 10 > > would send 10 packets over y for every packet sent over x > > > > However, experiments with the option balance= in shorewall providers > > suggest that a lower number gives a higher priority to a particular > > provider. > > > > Can someone give a clear explanation? > > In Shorewall, the weights in 'nexthop' are only relevant to the first > packet of each outgoing flow. Once an interface is picked, that > interface is used for all outgoing packets of that flow. So it is > *flows* that are distributed via those weights, and not *packets*. > > We take that approach to avoid sending packets with a source IP of one > ISP out through the network of another ISP, as ISPs have a habit of > dropping such packets. > > > > > Also, I believe providers with option fallback=n are never used unless > > all of the balance= providers are disabled, is that correct? > > Yes. > > And then, > > do the weights work the same way as for balance? > > > > Yes. > > -Tom > -- > Tom Eastep \ Q: What do you get when you cross a mobster with > Shoreline, \ an international standard? > Washington, USA \ A: Someone who makes you an offer you can't > http://shorewall.org \ understand > \_______________________________________________ > > _______________________________________________ > Shorewall-users mailing list > Shorewall-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/shorewall-users >
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