[j-nsp] egress balancing on J2350

[Yucong Sun]

Yes, i forgot to mention that I also have the hash-key set, but the result
is the same.

I've did some traffic analyzing on my egress traffics (before they hit
j2350), the flows are pretty diversifie. there are no dominant  flow that
is responsible for this 40mbps differences as above.   Which led me to
believe something is wrong in j2350.

BTW: my J2350 is also running in packet mode (not selective) , does that
affect any thing?


On Sat, Nov 23, 2013 at 11:51 PM, Chuck Anderson <cra at wpi.edu> wrote:

> "load-balance per-packet" really means "distribute load per-flow based
> on a hash of the traffic".  You should not expect exact balancing, and
> you will never get it.
>
> You can control which fields on the packet (MAC addresses, IP
> addresses, ports) are used to hash the flows by changing the hash-key
> settings:
>
> edit forwarding-options hash-key family inet
> set layer-3
> set layer-4
>
> I'm not sure whether J2350 supports these hash-keys or different ones.
>
> On Sat, Nov 23, 2013 at 11:27:01PM -0800, Yucong Sun wrote:
> > Hi,
> >
> > I'm been trying to get egress load balancing on J2350 10.4R9 and it just
> > does't work as expected, any one can shed some light on this?
> >
> > Here is what  monitor interface traffic looks like
> >
> > Interface    Link     Input bytes        (bps)      Output bytes
> >  (bps) Description
> >  ge-0/0/1      Up 706087502511390   (29248072)    27664195116364
> > (78022952) link-3
> >  ge-0/0/2      Up  30707284714253   (39000048)    27353978545943
> > (38232088) link-2
> >  ge-0/0/3      Up   8076879239425    (3346480)    27858475703889
> > (35689368) link-1
> >
> > Egress is 78/38/35 mbps , not balanced.
> >
> > I have
> >
> > route {
> > forwarding-table {
> >     export LOAD-BALANCE;
> > }
> > }
> >
> > policy-options {
> > policy-statement LOAD-BALANCE {
> >     then {
> >         load-balance per-packet;
> >     }
> > }
> > }
> >
> > I also confirmed route is installed correctly
> >
> > Routing table: default.inet
> > Internet:
> > Destination        Type RtRef Next hop           Type Index NhRef Netif
> > default            user     3                    ulst 262143     5
> >                               0:c:db:fe:ed:0     ucst   909     3
> > ge-0/0/1.992
> >                               0:c:db:fe:ed:0     ucst   608     4
> > ge-0/0/3.999
> >                               0:c:db:fe:ed:0     ucst   892     3
> > ge-0/0/2.991
> >
> >
> > WHY my regress is still not balanced ?! :-(
> >
> > Thanks.
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