Receive/export route limit behaviour?

[Guillaume LUCAS]

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).