[j-nsp] Load-Balacing Per-Packets on two equal paths

[Joe Metzger]

Try adding the following to your config:
	set forwarding-options hash-key family inet layer-4

And then have your traffic generator generate 2 streams with
the same source ip, destination ip and source port number. The
destination port address of the 2 streams need to differ by a
multiple of 4.

At this point you should see equal traffic across both links.
All the traffic within each stream should be received in order.

FYI, the actual algorithms used to split the traffic are not well
documented and may be subject to revision on different platforms
and/or different OS revisions...



Tomasz Matusiewicz wrote:
> 
> Hi
> 
> I tried to configure Load-Balancing Per-Packet on two equal paths. My
> network diagram:
> 
>                       fe-0/2/2----eth0
>                      /                \
> TrafficGenerator---M10                 NetBSD Computer (lo0 10.10.10.20)
>                      \                /
>                       fe-0/2/3----eth1
> 
> I sending about 6Mbit/s IP traffic from TrafficGenerator to NetBSD
> loopback address. But traffic to NetBSD is sended only across one
> interface :-(
> 
> M10 configuration:
> 
> interfaces {
>     fe-0/2/2 {
>         unit 0 {
>             family inet {
>                 address 10.10.10.5/30;
>             }
>         }
>     }
>     fe-0/2/3 {
>         unit 0 {
>             family inet {
>                 address 10.10.10.9/30;
>             }
>         }
>     }
> }
> routing-options {
>         route 10.10.10.20/32 next-hop [ 10.10.10.10 10.10.10.6 ];
>     }
>     forwarding-table {
>         export load-balancing;
>     }
> }
> policy-options {
>     policy-statement load-balancing {
>         from protocol [ static direct ];
>         then {
>             load-balance per-packet;
>         }
>     }
> }
> 
> Some outputs from M10:
> 
> > show interfaces statistics | match "^Phy|Input rate|Output rate"
> 
> Physical interface: fe-0/2/2, Enabled, Physical link is Up
>   Input rate     : 6285600 bps (533 pps)
>   Output rate    : 0 bps (0 pps)
> Physical interface: fe-0/2/3, Enabled, Physical link is Up
>   Input rate     : 0 bps (0 pps)
>   Output rate    : 3000 bps (4 pps)
> 
> > show route 10.10.10.20
> 
> inet.0: 118171 destinations, 118176 routes (118171 active, 0 holddown, 0 hidden)
> + = Active Route, - = Last Active, * = Both
> 
> 10.10.10.20/32  *[Static/5] 00:29:42
>                     > to 10.10.10.10 via fe-0/2/3.0
>                       to 10.10.10.6 via fe-0/2/2.0
> 
> --
> many thanks for reply,
> Tom
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> http://puck.nether.net/mailman/listinfo/juniper-nsp

-- 
Joe Metzger
metzger at es.net
Network Engineering,  ESnet
Lawrence Berkeley National Laboratory