RE: Per packet load balancing -- 2nd try

From: Andrew Smith (as160@yahoo.com)
Date: Tue Oct 23 2001 - 13:11:46 EDT


Paul

Thanks. I will try.

Best
---andrew
--- Paul Goyette <pgoyette@juniper.net> wrote:
> Yes, the selection is random. With a sample of only
> four destinations, you should not expect a perfect
> distribution. If you increase the number of routes
> gbeing advertised to several hundred, you will see a
> more nearly equal distribution.
>
> -----Original Message-----
> From: Andrew Smith [mailto:as160@yahoo.com]
> Sent: Tuesday, October 23, 2001 12:16 AM
> To: juniper-nsp@puck.nether.net
> Subject: Per packet load balancing -- 2nd try
>
>
> Hi, all
>
> I will try to ask this questions again and hope some
> get some expert advice on this topic.
>
> What I have is the following, all boxes have IP2. I
> have per-packet load balancing configured.
>
> ----
> M40 ---- M20 (advertising 1.0.0.0/24
> ---- 1.0.1.0/24
> ---- 1.0.2.0/24
> 1.0.3.0/24)
>
> 4 paths between M40 and M20 are equal cost. M20 is
> advertising 4 destinations via OSPF to M40. What
> I've
> seen on M40's routing table is:
>
> 1.0.0.0/24 via path 1
> via path 2
> via path 3
> >via path 4
>
> 1.0.0.0/24 via path 1
> via path 2
> via path 3
> >via path 4
>
> 1.0.0.0/24 via path 1
> via path 2
> >via path 3
> via path 4
>
> 1.0.0.0/24 via path 1
> via path 2
> >via path 3
> via path 4
>
> So, how is the next-hop selected? randomly? In this
> case, why are the other 2 paths not being utilized?
> I turned on trace options for OSPF, but couldn't
> really extract the info I need.
>
> TIA for any pointers.
> ---andrew
>
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