While we are on ECMP topic...
In L3VPN, when I've learned say, 3 different routes all using different MPLS
tags to the 3 remote PE's, is there a way to ECMP hash across all of the paths
to load balance?
Aaron
> On May 16, 2018, at 6:32 PM, Thomas Bellman <bell...@nsc.liu.se> wrote:
>
>> On 2018-05-16 15:22, Adam Kajtar wrote:
>>
>> I wasn't using per-packet load balancing. I believe juniper default is per
>> IP.
>
> The Juniper default is to not do ECMP at all. Only a single route is
> programmed into the FIB for each prefix in your RIB. If you e.g. have
> routes to 198.51.100.0/24 pointing to ten different ports, all traffic
> to that entire /24 will go out over a single port, unless you have
> explicitly enabled ECMP.
>
> To enable ECMP, you need this:
>
> policy-options {
> policy-statement ecmp {
> then {
> load-balance per-packet;
> }
> }
> }
> routing-options {
> forwarding-table {
> export ecmp;
> }
> }
>
> in your configuration. Note also that "per-packet" is a mis-nomer; it
> is really "per flow", based on a hash of the L3/L4 headers.
>
> 'show route forwarding-table destination 198.51.100.0/24' shows if you
> actually have multiple routes in your FIB.
>
>
> /Bellman
>
