Hi Ray,
By way of explanation.. without the interface the route is recursive, i.e.
20.20.20.20/24 is sent via 1.1.1.2. So the forwarding can be thought of as
happening in two stages, firstly the lookup for the packet’s destination that
matches 20.20.20.20/24 then the ‘lookup’ on the result of 1.1.1.2. One of the
prime functions of the FIB is to resolve and cache that second lookup during
route programming, so the data-plane can simply follow the result. The
ip4-load-balance node is where this occurs.
/neale
-----Message d'origine-----
De : Ray Kinsella <m...@ashroe.eu>
Date : mardi 13 novembre 2018 à 19:09
À : "vpp-dev@lists.fd.io" <vpp-dev@lists.fd.io>, "Neale Ranns (nranns)"
<nra...@cisco.com>
Objet : Re: [vpp-dev] ip4-load-balance
Mystery solved,
I was missing the interface on the IP Route.
ip route add count 1 20.20.20.0/24 via 1.1.1.2 TenGigabitEthernet83/0/1
Ray K
On 13/11/2018 15:39, Ray Kinsella wrote:
> Folks,
>
> I have configuring my system to get something comparable to CSIT
> performance and I am a few mpps off at the moment, using FD.io VPP 18.07.
>
> I duplicated the IPv4 Base and Scale Test Cases (and environment)
> locally and I end up with extra graph node 'ip4-load-balance' in my
> pipeline?
>
> CSIT records the following pipeline in Test Operation Data.
> https://docs.fd.io/csit/rls1807/report/test_operational_data
>
> Thread 1 vpp_wk_0 (lcore 2)
> Time 5.7, average vectors/node 245.79, last 128 main loops 13.03 per
> node 151.64
> vector rates in 1.2082e7, out 1.2082e7, drop 0.0000e0, punt 0.0000e0
> Name State Calls Vectors
> Suspends Clocks Vectors/Call
> TenGigabitEtherneta/0/0-output active 140125
> 34429184 0 8.41e0 245.70
> TenGigabitEtherneta/0/0-tx active 140125
> 34429184 0 4.09e1 245.70
> TenGigabitEtherneta/0/1-output active 140071
> 34428928 0 8.58e0 245.79
> TenGigabitEtherneta/0/1-tx active 140071
> 34428928 0 3.93e1 245.79
> dpdk-input polling 140580
> 68858112 0 6.07e1 489.81
> ip4-input-no-checksum active 280127
> 68858112 0 2.05e1 245.81
> ip4-lookup active 280127
> 68858112 0 3.03e1 245.81
> ip4-rewrite active 280127
> 68858112 0 2.92e1 245.81
>
>
> I get the following pipeline, with the additional graph node -
> ip4-load-balance.
>
> Thread 2 vpp_wk_1 (lcore 20)
> Time 188.9, average vectors/node 256.00, last 128 main loops 14.00 per
> node 256.00
> vector rates in 9.3287e6, out 9.3287e6, drop 0.0000e0, punt 0.0000e0
> Name State Calls Vectors
> Suspends Clocks Vectors/Call
> TenGigabitEthernet83/0/1-outpu active 6881842
> 1761751552 0 8.46e0 256.00
> TenGigabitEthernet83/0/1-tx active 6881842
> 1761751552 0 5.53e1 256.00
> dpdk-input polling 6881842
> 1761751552 0 8.58e1 256.00
> ip4-input-no-checksum active 6881842
> 1761751552 0 2.19e1 256.00
> ip4-load-balance active 6881842
> 1761751552 0 1.68e1 25
> 6.00
> ip4-lookup active 6881842
> 1761751552 0 2.80e1 256.00
> ip4-rewrite active 6881842
> 1761751552 0 2.89e1 256.00
>
> Any idea where ip4-load-balance is coming from?
>
> Ray K
>
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