Ignoring bogus route 240.0.0.0/4

[Alarig Le Lay]

On mar. 19 sept. 22:32:34 2017, Alexander Demenshin wrote:
> Hi,
> 
> Any reason why 240.0.0.0/4+ routes are ignored by bird (1.6.3)?
> 
> I have tried to blackhole this range in static protocol, but got this
> message.
> 
> Attempts to manually add any kernel route from this range were silently
> ignored.

Hi,

Because this range is not aimed to be routed or added to any host, cf.
https://tools.ietf.org/html/rfc1112 section 4.

You need to be part of a multicast group to use those addresses, as said
in https://en.wikipedia.org/wiki/IP_multicast#Routing

-- 
alarig
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