Receive/export route limit behaviour?

[Jonathan Stewart]

I'm not sure the BIRD logic, but it sounds like you're saying:

- send static
*and*
- send all provider A routes
*and*
- send all provider B routes

These would total more than a million routes.

Usually what you share downstream is your own routes; the best-path
selection after BGP processes all the routes it learned.  That would be a
list of about 680k best routes, and be less than your filter.

(alternately, you're getting different routes from each of your providers,
so if you add them together and remove the duplicates, you have more than
700k routes.  I have more than 700k routes in my default-free zone)

Jonathan

On Wed, Apr 4, 2018 at 4:42 PM, Guillaume LUCAS <glucas+bird at glucas.fr>
wrote:

> Le 04/04/2018 à 15:28, Ondrej Zajicek a écrit :
> > Hi
> >
> > What do you see in 'show protocols all' in import/export statistics?
> > Do they make sense?
> >
>
>
> Hi,
>
> # sudo birdc show protocols all
>
> direct1  Direct   master   up     2018-01-12
>   Routes:         2 imported, 0 exported, 2 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:              3          0          0          0
>     3
>     Import withdraws:            1          0        ---          0
>     1
>     Export updates:              0          0          0        ---
>     0
>     Export withdraws:            0        ---        ---        ---
>     0
>
> kernel1  Kernel   master   up     2018-01-12
>   Routes:         31 imported, 681991 exported, 30 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:             52          0          1          0
>    51
>     Import withdraws:           20          0        ---          1
>    20
>     Export updates:       83427721         55          0        ---
> 83427666
>     Export withdraws:      4163126        ---        ---        ---
> 4163135
>
> static_allocations Static   master   up     2018-01-12
>   Routes:         1 imported, 0 exported, 1 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:              1          0          0          0
>     1
>     Import withdraws:            0          0        ---          0
>     0
>     Export updates:              0          0          0        ---
>     0
>     Export withdraws:            0        ---        ---        ---
>     0
>
> bgp_upstream1 BGP      master   up     2018-01-27  Established
>   Routes:         678683 imported, 0 filtered, 1 exported, 569533 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:       38113294          0        294   12493695
> 25619305
>     Import withdraws:      2348477          0        ---        280
> 2348484
>     Export updates:       69298824   25943901   43354922        ---
>     1
>     Export withdraws:      2932089        ---        ---        ---
>     0
>
> bgp_upstream2 BGP      master   up     2018-04-03  Established
>   Routes:         681762 imported, 77 filtered, 1 exported, 112446
> preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:        2828562          0        109          0
> 2828453
>     Import withdraws:       162753          0        ---        125
> 162737
>     Export updates:        2175525     646411    1529113        ---
>     1
>     Export withdraws:        67445        ---        ---        ---
>     0
>
> ibgp     BGP      master   up     2018-02-18  Established
>   Routes:         681993 imported, 682012 exported, 10 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:       29660288          0          0     518955
> 29141333
>     Import withdraws:      7164695          0        ---          0
> 7164695
>     Export updates:       51000527   12312881          0        ---
> 38687646
>     Export withdraws:      1950522        ---        ---        ---
> 12715457
>
> bgp_downstream BGP      master   up     20:17:52    Established
>   Routes:         0 imported, 681980 exported, 0 preferred
>   Route change stats:     received   rejected   filtered    ignored
> accepted
>     Import updates:              0          0          0          0
>     0
>     Import withdraws:            0          0        ---          0
>     0
>     Export updates:        2121052          0      17236        ---
> 2103816
>     Export withdraws:         4750        ---        ---        ---
> 18179
>
>
> It seems to me it makes sense: in ibgp (no filter in place), this router
> redistributes 682012 routes (upstream1 + upstream2 + some differences
> between them, probably). 682012 - 2 (direct1) - 31 (kernel1) = 681979 =
> downstream. (kernel1 and direct1 are block by the "export where", see my
> previous mail)
>
> Yes, I use iBGP because I have an another router. Quagga. Same two
> upstreams. No downstreams. Same receive limits (shutdown BGP session if
> routes > 700,000).
>



-- 
     Jonathan
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