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[mc36 <>]

sorry for the spam, while added the test cases i found a bug that prevented 
proper compression,
so the final numbers are 900k-->261k for v4 and 160k-->52k for v6, see 
attached...
with this boost, we have plenty of headroom for both v4 and v6 in an nren 
fib...
(we're a tier3 isp mostly default routing to the geant, the only exception is 
bix (with
120k prefixes, mostly from he.net) and some private peerings to local bigger 
isps....
br,
cs

On 1/4/23 18:42, mc36 wrote:
> not again! i forgot the commit url:
> https://github.com/rare-freertr/freeRtr/commit/d76a255b26b2ad3ade8de3a1124e21a1c32c2bcf
> the whole algo fits the screen... :)
>
> On 1/4/23 18:04, mc36 wrote:
> > hi,
> > i've just implemented fib compression based on the following two ideas:
> > -two consecutive prefixes with the same nexthop...
> > -subnets of a supernet with the same nexthop...
> > it reduced the niif v6 fib from 160968 to 72298 (44%) and the v4 fib from 
> > 901199 to482847 (53%)
> > for the 
> > https://bitbucket.software.geant.org/projects/RARE/repos/rare/browse/profiles/9.10.0/tofino2/profile-rawip.p4
> > profile we have a plenty of headroom for v6 and some headroom for v4...
> > for now only show commands are there but nothing holds back from adding 
> > auto-summary knob
> > to the routing protocols and/or export-compress knob to the p4lang server... 
> > or both...:)
> > br,
> > cs
>
>
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