> Lukas Tribus
> Sent: Thursday, April 21, 2016 1:17 PM
>
> > On 20/Apr/16 20:12, Lukas Tribus wrote:
> >
> >> If we would know the platform, we could tell you more, but
> >> generically speaking, ECMP doesn't behave any better or worse than
> port-channeling.
> >
> > Beg to differ on this one.
> >
> > We have converted some LACP links to native IP/MPLS to get ECMP
> > because of issues with some of the payload not being equally hashed
> > across the LACP member links.
>
> What I meant (with "generically speaking"), is that there is no reason for a
> box to differ in the load-balancing behavior just because of ECMP vs LACP,
> because the NP lookup to create the load balancing hash has the same exact
> cost (its not like LACP is a encapsulation so the NP has to look deeper into
> the
> packet).
>
> That doesn't mean all boxes use the same load balancing hash algorithm for
> ECMP and LACP, it just means that there is no reason this data plane load
> balancing algorithm has to differ between LACP and ECMP.
>
> I'm talking about the load-balancing hash here. Its obvious that ECMP can
> load-balance in all kinds of l3 topologies where as LACP only balances towards
> the same box.
>
>
> ASR9k is a platform that behaves the same from a load-balancing hash
> perspective with both ECMP and LACP afaik.
>
What parameters used for load-balancing actually depends on the case in which
the bundle is used in.
For details please see:
https://supportforums.cisco.com/document/111291/asr9000xr-loadbalancing-architecture-and-characteristics#L2
adam
Adam Vitkovsky
IP Engineer
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