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[RARE-users] reenablement of bgp prefix packing...


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  • From: matecs <>
  • To: "" <>, "" <>
  • Subject: [RARE-users] reenablement of bgp prefix packing...
  • Date: Mon, 23 Jan 2023 08:02:00 +0100

hi,
i've re-enabled bgp prefix packing that went out of service when we got
addpath rx/tx support...
now it's functioning again and it saved 22% of the updates and 17% of the
bytes... the latter is
quite low because these connections already use the
draft-bgp-compressed-updates which takes
better care of this by reducing the bgp chattyness to 1/5 in average...
the 10.10.10.25 got the new code early and i let it ran for half a day and
both the new and the
old code arrived to exactly the same rib-in after comparing them so it shows
the correctness of
the current algorithm implemented... this testing involved a lot of
incremental updates and some
route refreshes which induced a full reflooding then switching to the
incremental mode...
br,
cs


sid#
sid#show ipv4 bgp 1955 unicast summary
neighbor as learn accept will done uptime
10.10.10.25 1955 902511 902511 0 0 12:36:31
10.10.10.150 1955 902511 902511 0 0 12:36:31
10.10.10.250 1955 902511 902511 0 0 12:36:31

sid#show ipv4 bgp 1955 connection
update byte refresh
neighbor as rx tx rx tx rx tx
10.10.10.25 1955 2486636 765 49194431 259 0 0
10.10.10.150 1955 3604160 765 59023249 259 0 0
10.10.10.250 1955 3512223 765 57471381 259 0 0

sid#show ipv4 bgp 1955 unicast compare 10.10.10.25 10.10.10.250
% unique to 10.10.10.25
prefix hop metric aspath

% unique to 10.10.10.250
prefix hop metric aspath

% attribute differs
prefix hop metric aspath

sid#show ipv4 bgp 1955 compression
operate ratio
neighbor as rx tx rx tx
10.10.10.25 1955 true true 19.1% 227.1%
10.10.10.150 1955 true true 16.3% 227.1%
10.10.10.250 1955 true true 16.3% 227.1%

sid#


  • [RARE-users] reenablement of bgp prefix packing..., matecs, 01/23/2023

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